Icom IC-R8600 "Wide Band" SDR / DSP
The excellent ICOM IC-R8600 "Wide Band"
communications receiver. Direct Sampling SDR below 30 MHz. Hybrid Superhet / SDR above 30
It is NOT just a IC-7300 "receiver" section with VHF / UHF Coverage
added on (however overall HF receiver performance is similar). In our
view the best receiver Icom has produced to date ("Wide Band" or not).
One MUST remember this is NOT a "scanner" type receiver, so no Trunking
IC-R8600 has much fuller audio range when compared to the IC-7300
transceiver cousin (which has no bass response in comparison). One bug
that existed until firmware 1.34 was what we called "AGC
Swamping" (see text). A number of display failures reports have appeared (see bottom of page). (N9EWO Photo)
Icom IC-R8600 Wide Band SDR / DSP Communications Receiver (as Stock).
Comparisons made in this report to the Icom IC-R9000, IC-7300 HF SDR
Transceiver and IC-R9500 Wide Band
(all tested and or owned previously).
Important Note : This report
looking at the IC-R8600 receiver more on the "Short Wave" HF side of
below 30 MHz.
Model : ICOM
Manufacture : Japan
Tested : 1.02, 1.10, 1.20, 1.30, 1.31, 1.32, 1.33, 1.34, 1.35
(approx.) of Test Sample : 0201xxx (02 USA Cell Blocked Version)
Accessories Tested :
IR Remote : USA (discontinued / was not manufactured by Icom)
Software" (Versions 1.10, 1.20) [Made in Japan]
SP-39AD External Speaker / Power Supply (Made in Japan) [Contains
AD-55NS, Made In China]
RS-12A Regulated Linear Power Supplies [Made in USA]
Various Die-Cast 2 Way Mini-Speakers (see text)
Test Antenna's :
Comet DS150S Discone Antenna (30 ft height)
RF Systems MLBA-MK2 long wire (55 ft length - 24 ft height at peak)
Comet H-422 Dipole (24 ft height - Straight Configuration)
SERVICE MANUAL ADDENDUM (March
2021) : Optional service manual addendum dated March 2021 shows updated
specifications, parts list, board layouts and schematics. What
differences between earlier samples and later ones covered in the addendum have not been compared or experienced / tested.
Second production run of the USA Cell Blocked 02 version of the IC-R8600 ? Production runs are indicated in the serial number : 02002xxx
(the production run indication is the 4th and 5th digits from the
right). Version number is the first 2 digits of the serial number. Does
the addendum have anything to do with the second production run of the
02 USA cell blocked version (that is unknown) ?
Sherwood Engineering IC-R8600 Lab Numbers and Report (PDF Format, click here)
Coverage / Internal Digital Voice Mode Decoding
The Icom IC-R8600 "Wide Band"
Communications Receiver coverage is from 10 kHz to 3000 MHz (less the
outdated cellular blocks for USA 02 versions ) in the usual AM, AM-S,
USB, LSB, CW, FM and FM Wide modes. However it also "internally"
decodes a number of digital protocols : Baudot RTTY, D-STAR, NXDN (4800
dPMR, DCR (Digital Communication Radio) and APCO P25 "Phase 1".
Woefully missing is the now widely used DMR (Digital Mobile Radio), and
being this not in Icom's game plan do not look for it to be included
either later on (ditto for Yaesu's Fusion C4FM). But there is a I/Q
port provided for using external decoding devices.
You Tube Video - Icom IC-R8600 - Decoding DMR
Decoding DMR With
a Icom IC-R8600 [using HDSDR and DSD+] "You Tube" Video in French
It uses the same identical RayStar 4.3 inch color TFT "touch screen"
display with super fast spectrum scope and waterfall display as with
the IC-7300 HF Transceiver. Some may say that that it is 100% IDENTICAL
to the IC-7300 for HF reception ? As covered in this report it
indeed is in many ways, but not entirely. There are many differences
other than just receiver coverage and is more suited for broadcasting
listening and also includes internal digital decoding for above 30 MHz.
What's The Draw To The IC-R8600 ? / Real Direct Sampling Up To 30 MHz
What are the pluses to the Icom IC-R8600 "Wide Band" receiver ? I
would say the first on the
list is it being a "Direct Sampling" Software Defined Receiver
design up to 30 MHz (just as with the IC-7300 HF Transceiver). That’s
right….no traditional mixer and IF stages in the HF coverage. Right
the antenna input there are 11 bandpass filters then to a 14 bit analog
to digital converter, after that there is a FPGA (Field Programmable
Gate Array). Above 30 MHz it does use a
traditional Super Heterodyne scheme and then down conversion into the
- Low distortion and
hiss free audio (crisp and
SUPER CLEAN) with EXTENDED bass and treble adjustments for each
mode (firmware 1.32).
- 4.3 inch color TFT "touch screen" display with super fast spectrum
scope (up to 5 MHz swath) and waterfall display.
- Proper AM mode
bandwidths for MW / SW Broadcast use, right up to a nice WIDE 10 kHz
one when conditions warrant.
- Icom's proper
choices of tuning KNOB
steps and how selected.
- QUIET No Fan operation.
- Built in digital
"off air" audio recorder with usable quality for MW
/ SW / FM Broadcast use (higher quality recording over IC-7300).
- Front mounted SD card slot (unlike the rear mounted and difficult to
access CF card found in the IC-R9500).
- Just as it is
use, EXCELLENT super fast "Spectrum Scope" that can be tweaked for user
preference (up to a 5 MHz total swath).
- LCD Backlight uses LED's for Greatly Improved Display Reliability (no
- Very good
(optical encoder) tuning knob that is wobble
free and generally smooth operating (has Click or Smooth selection).
- Provided tilt
bail for proper angle that also includes tabletop / anti-slide
(rubberish tube on bail and real rubber rear feet).
- No use of rubber
like buttons (as
used with the Icom IC-7200, IC-718 Transceivers, IC-R8500 and IC-R75
- Rugged metal outer
cabinet and Die-Cast chassis.
- High "Q" 11 RF
Bandpass Filters on HF, 13 for VHF and UHF.
- TCXO included as standard (+- 0.5 PPM)
- Superb Phase Noise Characteristics.
- 3 Event Timer / 120 Minute Sleep Timer.
- Ethernet Operation for remote "World Wide" use / NTP Time Server
- I/Q baseband signal output port (see text).
: Less relay "clicking-clacking" vs. the IC-7300 Transceiver. With no
transmit electronics in
the IC-R8600 one will experience much less relay clicking as you tune
around. This has to do with the transmit low pass filters / relays (as
has none). There
are still relay's used in the receiver mind you, but not many. On a
side note : No schematics or full block diagrams are included with the
Small Lightweight Cabinet /
Metal Outer Shell
Icom's IC-R8600 receiver is housed in an attractive metal outer
cabinet (plastic front bezel) with an internal thicker die cast chassis
that also creates the
semi unpainted rear panel (1/2 is a sticker of some kind ?). When
compared to the IC-7300 HF
transceiver (see my review here),
smaller and ever so slightly heavier. A very good pop-down tilt bail is
included and has a rubbery-plastic protection tube that saves the
desktop and helps to keep the lightweight box from sliding around in
use. There are also 2 bottom rear REAL RUBBER feet (not hard plastic)
to also aid with any sliding around issues.
(in inches Width x Height x Depth) :
IC-7300 : 9.45
x 3.7 x 9.37 / 9.26 pounds (4.2kg)
IC-R8600 : 8.7 x
3.5 x 9.1 / 9.50 pounds (4.3kg)
top of the cabinet there is it's small internal speaker output. It's
sounds decent for it's size. But of course only a external speaker will
satisfy most including me (more on that later in this report).
There is NO internal fan used of any kind in the IC-R8600.
This is of course very good news, but it does operate with a bit of
however, more so if one operates it at 13.8 volts (15 volts ??). Yes,
does require use a external power supply and more on that topic later
knobs have a good feel and all buttons use traditional tac
switches. Buttons do have a slight wobble, but is nothing serious. No
undesirable soft plastic “rubber feeling” buttons are used. There are
3 mechanical "push in" rotary encoders used for many functions
including volume. These have a softer feel over the lone one found on
the IC-7300. There is
the typical slight rotational play with these, but is nothing
Main “metal” tuning knob is a bit smaller over the
IC-7300's but still has the rubber like track (and is actually
a bit thicker). Not
sure at the time this report was typed if it's a “push on” variety knob
or uses a set screw ?? It's spinner hole is not a separate movable
piece (is just a dimple in the knob). Is a "clicky" type (detents) out
of the box. Good news , there is to way select a "smooth" feeling knob
by moving the 3 position slider adjustment on the bottom of the knob
(it's not so easy to do however). So it goes from left to right :
loose - smooth tight - clicky". It has some rotational play in
the "clicky" mode (but so does the IC-R9500's knob in "clicky " mode),
but overall it feels good and this knob scheme was well done.
only can the LED back light be dimmed (we use ours at 20%, default is
50%), the other LED panel indicators can be separately dimmed which is
a nice touch. The active SD card slot indicator is a blue LED just left
of the slot (with the IC-7300 indicator this is on the LCD). It flashes
one accesses data to and from it. IMPORTANT NOTE : One MUST properly
"Dismount" the card just like with a computer (if the set is powered
The "P.LOCK" button disables the front panel controls including the
tuning knob (white LED when activated). Even better is if you hold this
button down for 1 second it will turn off (toggle) the backlight. Very
useful if you walk away from the set / room for awhile (without having
to power it off).
There are 3
- ANT 1 is a N
Type Connector that covers all ranges.
ANT 2 is a SO-239 for up to 30 MHz.
3 is a RCA (Phono) type jack that is a second input for up to 30 MHz.
All are selectable in programming so to make it easy if you are
using different antenna's. There is one rear RCA jack that is a "AUX"
(indicated in the manual that it is not connected to anything).
2 power inputs are provided. One is using the 3 pin molex type style
(is also used on the IC-R9500), and a nice flexible power cable is
included. The other is a EIAJ-5
Power Jack / Plug (4.3 x 6.5 x 9.5mm) type.
Former USA Icom dealer
"Universal Radio" stresses
these important "Operational Reminders" to IC-R8600 owners (especially for those
who DID NOT read the included printed manual).
Be sure to
insert the supplied "short connector" into the radio's rear panel if
using Icom's AD-55NS or SP-39AD.
accidentally try to insert a PL-259 connector into "Antenna Jack 1".
(This is an "N" jack).
Rear Panel of the
Icom IC-R8600. "AUX" is a RCA (Phono) Jack that has no internal
"Meter" Jack allows for connection of a external signal strength
(usually mechanical type) meter.
Adjustment in the Menu's allow this up to 8 volts, output
impedance 10K (not tested).
Requires External Power Supply /
Astron RS-12A / Operation "Near Hot" at 13.8 Volts
With the IC-R8600 rated a near
2 AMP current draw (it's actually approximately 1.4 amps continuous in
Sherwood Engineering tests),
does make for very warm operation after a few hours on. It does NOT
make use of any
cooling fans...very good news here ! Any fans operating in a RECEIVER
is unacceptable to N9EWO. The IC-R8600 requires an external
power supply, and I REQUIRE my regulated linear power
supplies NOT to run HOT with any continuous operation. I would NEVER
use ANY switching type supply with it (as about 99.9% of them are RF
noisy in some way with a HF receiver no matter how well they are made),
but that's MY choice. I say the
minimum size to use is the Astron
RS-12A model. While this may
seem way overkill, we tested a smaller
RS-7A and after being on for 2
hours (important : screen saver off so backlight on
full time) it's lone rear pass transistor was too
hot to touch which is totally unacceptable to N9EWO's standards. The RS-12A
has 2 rear mounted pass transistors and a larger heatsink (and thankfully still
no fan to create room noise). We extensively tested / compared a RS-7A
vs. the RS-12A with the IC-R8600 (both
at the stock 13.8 output voltage) and the RS-12A model is the PROPER
linear power supply for the IC-R8600. I say do NOT go with a lesser
current Astron model if you wish it to run to N9EWO heat standards ! It
operates the receiver for extended periods with the heat sink only
somewhat near hot (even at the changed 12.2 volts setting, see below).
I will NOT be held
responsible for any info that is listed here
ALL DONE AT YOUR OWN RISK !
in our view the IC-R8600 runs quite warm almost near HOT after a 3 to 4
hours of operation (especially at the marked regulated 13.8 DC volts, screen
saver off) ! VERY
(PLEASE NOTE) : Test with SCREEN SAVER OFF , cabinet heat test based in
a non-air conditioned room during
warm summer time conditions.
Being in a cooler operating environment
cabinet heat will vary (be much less) !! NEVER block the cooling
top of the set as indicated in the manual page 2-1 !! Give it room to
properly dissipate the generated heat. Our recommendation is DO NOT
stack ANYTHING on top of it (including another radio or even a clock).
Extensive testing was done to see if operation at a lower
voltage would help to reduce
cabinet heat (for less internal voltage regulator burn off it has to
The voltage input specifications are regulated 13.8 DC volts plus or
minus 15%. That puts the low end at 11.73 volts, and sure enough as one
goes a bit below this voltage the receiver stops operating. I wanted to
a .5 volts (half a volt) buffer above the low
end specification , so we went with a setting of 12.2 volts
made with the IC-R8600 on / as
loaded to the host Astron RS-12A power supply).
Good news is that this does indeed help to reduce cabinet heat in our
you it will not make for cold operation, but we found this to help make
a definite noticeable difference even
if only slight (and
can only help with the receivers longevity, less internal voltage regulator heat burn off. We have not noticed any
performance as this text was added at the 12.2 volt
setting. Yes, it's even a bit hotter operation with the Icom AD-55NS or
SP-39AD with those being at 15 volts, see additional information below.
Most of the IC-R8600's heat is
from the LOWER right side of the chassis (with the front panel facing
you). Yes, many will say this is plain craziness, but in hands on testing this was OUR experience !
Mind you this is still a much better showing with operational heat in
any event when compared to the Icom IC-R9500 or
IC-R9000 receivers with their VERY "hot" operating internal power
supplies (both tested previously).
NOTE and WARNINGS : The Astron RS-12A
host power supply has an INTERNAL
voltage adjustment (between 11.0 and 15.0 volts). It's a thumb wheel
trimmer pot located on the parts side of it's PC Board and is not so
easy to get at (and the cabinet can be a bit difficult to get off and
back on). This one is for owners who have experience dealing with
this kind of stuff (and have
a known "accurate" digital voltmeter).
If you are not, PASS THIS
UP and find a friend who is that can help you if you wish to do this !
Astron does make variable linear type power supplies that have a external voltage
adjustment, but these are not recommended as it just too risky for its
knob to get bumped.
Another WARNING is be sure NOT to ground any system cables (even audio) to the TWO UNCOVERED TO-3 pass transistor cases on rear of the RS-12A.
This could very well (probably) do catastrophic damage to not only the
RS-12A power supply but also to any connected devices (crow bar circuit
in place or not) ! For one electronic handy enough could add 2 low
cost TO-3 transistor covers here to be safe.
Recommended LINEAR (Transformer)
Astron RS-12A Regulated Power Supply. Click on photo for larger view. While it may seen overkill, continuous
operation of the IC-R8600 made the lesser Astron RS-7A model to run too
HOT !! We turned down the operation voltage
of the RS-12A to 12.2 volts to help reduce the IC-R8600's cabinet heat
slightly (see text above, photo) The small piece of cardboard jammed in
the RS-12A's top cover helped to reduce it's cabinet transformer buzz
(a common trait). (N9EWO Photo)
Matching "SP-39AD Power Supply - Speaker" / Why 15 Volts ??
Tested was a sample of the
optional Icom SP-39AD External Speaker / Power Supply
combination. It is made in Japan and it contains inside a AD-55NS
switching type power supply (made in China). Please Note : The AD-55NS
"floor style" power
supply is also sold separately. All metal construction (except
bezel) is solid and very attractive matching the IC-R8600
perfectly. Front speaker grill is also metal and excellent
Size is 3.9 (w) x 9.5 (d) x 3.5 (w) inches, weight is 3.5 pounds.
Has the same excellent rear "real" rubber feet as does the
IC-R8600 (using screws for
attachment, no undesirable stick on ones are used), chrome tilt bail
protection. So one will not have to worry about it sliding around the
table nor damaging it. It includes a detachable and very flexible "2
wire" 6 foot length AC power cable. It is not polarized so can be
inserted either way into the power outlet (117 VAC tested cable).
"straight wired" DC output cable is
2.1 feet long and the speaker cable comes in at 5.5 feet long. Internal
speaker size is 2.5 inches large (this is the actual measurement done
and has a 5 watt rating.
OK, the BIG questions is : How much RF noise does the power supply
generate on Medium
Wave and Short Wave bands ?? Just as it is with most (if not all)
switching type power supplies, our testing of the SP-39AD (AD-55NS) we
indeed experienced LW / MW / SW RF noise interference (setting a
on top of it's case made it go really wacky). We used an active
INDOOR MW and
Tropical Band Loop antenna's
(good for up to 7 MHz) in the same room
and close to the receiver. On the MW band we could
hear the supplies buzzy hash (touching the metal case of the speaker
actually made it a tad worse). But importantly the strength of this
power supply hash was "usually" lower than any received signal.
depended how close the loop antenna was to the SP-39AD case. Above 5
MHz using a passive 30 Foot INDOOR SW long wire across the ceiling of
the room, the noise was even less of a problem (but still detected).
Above approx. 30 MHz it was never much of a problem. If one uses all
antennas (at a decent distance from the receiver) this noise was not
much of an issue at all. By the way it made no difference what way the
AC Plug was inserted into the outlet.
So if you use a indoor loop (or a indoor long wire for SW) near
the SP-39AD just be sure and keep it as far as you can and should be no
problem in most cases. But one must remember your situation and
experiences may vary (as it goes with ANY indoor antenna use). It's not
the worst switching power supply we have encountered over the years
(again it's actually OK for MW / SW using outdoor antenna's). However in any event WE still choose to use a
(Transformer) Regulated Power Supply set at 12.2 volts output as
covered above to rule out ANY
noise issues 100% (but again that is MY choice).
WARNING : Question we asked Icom America : "Why is
the output of AD-55NS power
supply at an excessive 15 VDC ?" The receiver operation is just fine
the cooler 12.2 volts (this is well within the + - 15% specifications
at the nominal 13.8 volts). At 15 volts it also operates the IC-R8600
even a tad
hotter than at 13.8 volts (as tested). As of this report being typed we
have not received any answer back on this topic. The author would NOT even think of
operating the IC-R8600 at 15 volts EVER, even if it's within the + -
15% specifications !
As far as the internal 2 1/2
inch speaker fares in the SP-39AD, to our ears it did NOT sound as good
as the IC-R8600's internal speaker (even being it's pointed towards the
user). It was no where close. Lacks ANY bass response even at the
maximum + 15 Bass setting. This part of it was extremely poor in our
view for any broadcast listening (however it is acceptable for voice
Please see our speaker suggestions later in this report, that is
if you wish to obtain the best possible "Broadcast" speaker audio
quality from the
receiver (the SP-39AD is not it).
If a Icom "external speaker" is a MUST
HAVE for your IC-R8600, our suggestion is the larger SP-20 model
(now sold as the SP-34 in a black
It's the only Icom external speaker we have ever tested to
decent to our ears. It's has a nice large 5 inch speaker, audio
filtering, dual inputs, neat Speaker "on-off" switch with LED and a 1/4
inch headphone jack to boot.
However it is quite pricey.
The SP-39AD is a very attractive matching speaker with a built in AC
power supply. It may or may not live up to your expectations (that is
call and depends what type of signals you listen to).
SP-39AD "Switching" Power Supply / Speaker.
Frequency Coverage / Offered Modes
It contains a
stand alone "floor wart" AD-55NS hidden inside (15 volt output).
Receiver Coverage: 10 kHz to 3000.000 MHz
(Minus 800 MHz cellular frequencies for
“USA 02” blocked versions).
(in comparison the IC-R30 hand
held receiver coverage is 100
kHz to 3304.999 MHz,
Modes (firmware 1.35):
- S-AM (L)
- S-AM (U)
Digital Voice-Decoding Modes (firmware 1.35):
APCO P25 (Phase 1)
NXDN - N (Narrow - 9600 , 6.25 kHz)
NXDN - VN (Very Narrow - 4800 , 3.125 kHz)
Just as with the Icom
IC-R30 hand held receiver (N9EWO's review available here), it lacks DMR and Yaesu Fusion decoding. WFM mode is fully operational in the 902
to 928 MHz range.
Being this is a communications
receiver and not a scanner, Trunked Radio Systems (TRS) are NOT
followed. Provided a TRS system is not too busy and not using “Phase 2”
APCO P25, one can use the old trick and enter the frequencies in
memories as conventional and just leaving (or locking) out the control
channel. Also not allowing any channel delay. Not a perfect scenario
but at least usable.
Excellent "Front End" Bandpass Filtering
Impressive "Front End" filtering is provided. Bandpass ranges of those filters are :
- 0.01~0.49999 MHz
- 1.60~1.99999 MHz
- 2.00~2.99999 MHz
- 3.00~3.99999 MHz
- 4.00~5.99999 MHz
- 6.00~7.99999 MHz
- 8.00~10.99999 MHz
- 11.0~14.99999 MHz
- 15.0~21.99999 MHz
- 22.0~29.99999 MHz
- 30~49.99999 MHz
- 50~79.99999 MHz
- 80~107.99999 MHz
- 200~319.99999 MHz
- 320~499.99999 MHz
- 500~749.99999 MHz
- 750~1099.99999 MHz
Super Spectrum Scope Display / LED
Backlighting / Can See the Weaker Signals
"Spectrum Scope" Display that allows for viewing of a chunk of the HF
spectrum up to 5
MHz Max (+/- 2.5 MHz).
This is a huge improvement to
the older IC-756 PRO, PRO II and PRO III HF Transceiver models that
only did 200 kHz
max. Even the IC-7600 is limited to 500 kHz Max, the IC-7300 is 1 MHz
Max (+/- 500 kHz). The 1 MHz setting is the most useful "maximum" width
for use on HF. It matches the normal scope mode width (with no
muting) of the expensive Icom IC-R9500 super receiver for use above 30
MHz. Works better too
as it unearths the weakest of signals, where the IC-R9500 weak ones are
awash in it's noise floor "grass" (see my IC-R9500 review
here). There are 3
different speed settings of the spectrum scope, but why anyone would
want to slow this down is a good question ?
it is only a 4.3 inch screen, it is a bit tight for what needs to
be displayed, but it gets the job done. We have an excellent
"Waterfall" screen as well, something completely absent on the elder
and very pricey IC-R9500. Why this was added to the IC-7600 HF
transceiver later and not to the IC-R9500 has always been a great
As is the normal for Icom here, the IC-R8600 spectrum scope still
for the 2 different types of tuning. One type where the center of the
tuned frequency moves with the dial and the other and way where the
scope stays fixed and you tune a red marker across the screen. The
desired tuned segments are adjusted in the menu's (very easy to do).
Again we have to stress that the scope sensitivity
is excellent , plus with the bottom grass noise being totally absent
existed with older models (including the Icom IC-R9500).
One can change the colors of the display "scope" (personally I like
green), as well as the waterfall colors. Also a timed background
"ghost" display will indicate what have been received until you tune
again with the knob or when it resets (this can be turned off which we
prefer to do). This
spectrum scope is active full time and no receiver muting at any time.
Changing the spectrum display to "no-fill" made it look
more “old school” (to no fill at all). Please see below for a photo and
the bottom of this page for adjustment details.
The IC-R8600 will not have a problem with CCFL “Florescent
Tube” backlight failures as it uses LED Backlighting (but as is the
normal is still possible for LED and or LCD failures, see information
at the bottom of this review). Its resolution is
also MUCH improved over the IC-7600 / IC-R9500 LCD's (even being a
So it’s very sharp and extremely "W-I-D-E" viewable even being small.
Display Sizes and Resolution
IC-R8600 / IC-7300
RFE430H) 480 x 272
IC-7600 : 5.8
L5S30853P00) 400 x 240
Again, testing found the sensitivity of the spectrum scope to be
Very weak signals on the scope were detected (with no local
present…..and that is very important). Is the second (first was the
IC-7300) Icom set with a
spectrum display where this was was possible. This is even
comparing to the very expensive IC-R9500 receiver (N9EWO
review click here). More
school "Spectrum Scope" settings,
please see the bottom of this page for details.
Touch Screen / Stylus - Screen
OK, lets get it out of the way that I’m NOT a fan of touch screens
being used with a stand alone Receiver or Transceiver. Mind you I NEVER
touch a set with dirty hands / fingers (and SHORT fingernails).
But even with that in mind, greasy and
fingerprint smearing is still going to be an issue anyway.
I also strongly do
NOT believe in any use of those stylus pens (popular for
tablets and smart phones - rubber tip or not) with the IC-R8600. That
constantly slamming against the LCD sure can't do it any good. I see
some using a pencil eraser......really (ouch) !! Your CLEAN fingers are
much softer than that.
NOTE : With the radio turned OFF, we CAREFULLY use a CLEAN screen cleaning cloth (made for LCD TV
WATER (when it needs to be dealt with, which is not too
dripping wet but not dry either, getting it totally wet and then
squeeze out as much water
as you can
from the cloth BEFORE. Using a very "light touch" is also the
important word here. We just let it AIR
DRY (which is not much) after with NO additional cloth usage to
help to dry it. Of course if you do this "wrong" could lead to
water where you do not want it for LCD or other serious damage......"so you have been officially warned"
NEVER NEVER....spray any liquids directly on to the LCD !!!
I will NOT be held
responsible for any info that is listed here
ALL DONE AT YOUR OWN RISK !
Some have added a smart phone screen protector to prevent scratches and
other nastiness. But is this a good idea ? Five reasons why for ME it
is going to cloud the screen a bit (I say….NO matter what the screen
protector manufacture hype is).
2. It's a
major chore to get it PROPERLY installed (good luck getting this
looking 100% decent).
3. Stress created
on the LCD pressing this into place (and removing). Read
the warnings in your IC-R8600 owners manual.
4. Possibility it
could make the touch sensitivity a bit less (or MUCH
less) ? As again covered in the owners manual.
on it's "resistive type" touch screen is not going to make ANY
difference if you have a screen protector on it or not.
So I choose NOT to make use of a screen protector and being I’m a very
picky-careful dude and again ALWAYS CLEAN hands / fingers….it
has not been a problem for ME and part of the
reason why is next.
The Discontinued "R-75 SWL-Remotes"
To help with fewer pokes on the LCD touch screen, tested was a
IR remote control device that allows basic operation of the Icom
IC-R8600 via a universal TV remote control. This “R75
was originally to be used with the Icom IC-R75 receiver but also works
with other newer Icom receivers / transceivers as well via the CI-V
"Remote" jack. Just connect the included CI-V cable between a very
small black control box and the transceiver. Next plug in the (also
included) very small ANALOG 9-volt wall wart 120 vac power supply into
the jack on the remote box. Program any universal remote control for a
Sony TV's and that is it after a few setting changes on the IC-R8600
There are a few differences than used with the IC-7300.
For one direct keyboard entry is limited to 60 MHz (as the old IC-R75
receiver coverage was and the remote controller was originally made
for). These are NOT for the "Icom generic" model that "SWL Remotes"
also sold (although some will be valid). PLEASE NOTE : For
part (aside from toggling some receiver functions), it's really only
useful up to 60 MHz.
IMPORTANT : Sadly
"R-75 SWL-Remotes" product has been discontinued and no longer
One will have to hunt on the used market now and will not be easy as it
was not a widely sold product.
There is bit of a learning curve and not all functions are valid as the
IC-R75 is a little different
This IR remote will NOT allow for any control of the spectrum scope
functions (among others). However most of the basic functions are
including, control the sets volume as well as muting it (one not even
available on the set), tune up and down the band or zip through your
memory channels (except for memory channel 00). Adjust the bandwidths,
AGC, PBT, Tuning Steps and even
for entering the memory channels and much more. Also you have direct
keyboard entry that is more straight forward and faster than on the
sets touch screen. Yes, this USA made product was a bit pricey when
NOTE : Do NOT confuse the proper R75 model with the more "generic
version" that is for older Icom models (example : volume or muting
control is not supported for the older sets with this generic model).
"SWL-Remotes" USA made after market device works great with the Icom
Low cost SONY RM-EZ4 "Big Button"
remote works well with this device. You do not want a remote with lots
buttons or functions (it will make it much more confusing to use). The
Volume and Channel buttons are a bit on the stiff side and not the best
placement on the RM-EZ4, but it gets the job done nicely. Also good
that it uses 2 AA batteries for longer life (not the less desirable AAA
type) and a LED that comes on when a button is pressed. Any universal
remote will do the trick ,
just programed to work with Sony TV's. But the simpler the remote the
(sorry product now
discontinued, this was NOT a Icom product)
NOTE : I no longer make use of
alkaline batteries due to the high
(likely in time) possibility of leakage. The use of the "low-self
discharge" type (or called pre-charged) AA rechargeable nickel-metal
hydride cells works fine with most IR remotes (including the Sony as
indicated above) and near eliminates this possibility of leakage. An
alternative would be the use of non-rechargeable AA Lithium batteries
(these have a much less chance of leakage over alkaline types as well).
Settings using the “R75 SWL-Remote” with the Icom IC-R8600 (Important :
default settings in the remote device) :
1. Change the port "baud
rate" to 19200 in the IC-R8600 menu’s (don’t use auto).
2. Change the "address" to 5A (from the 94h default) also in the
can be a bit finicky operation at first use (learning curve) ;
especially if you punch
the remote buttons a bit too fast and you get the blinking LED timeout
indication (this is a bit dependent on the remote model used). There
are timing settings on the remote that may help here, but I have not
attempted those as this report was typed. Not a real drawback
Good / Metering
with the Touch Screen nastiness and limited one touch operations in the
mix, overall ergonomics are
good. But as it goes not as pleasant as if real buttons were in use
(the IC-R9500 is better in this regard) .
direct keyboard entry is much easier to make happen using the IR remote
covered above for the HF spectrum. One can select memory channels (once
a group is selected with the up down buttons) either the main tuning
knob or with "Dial C" knob.
As far as the
NORMAL Mechanical Encoder usage is (Sub Menu when knob is pushed in) :
Dial A : SCAN
DELAY / Sub Menu : SCAN SPEED and PRIO INTVL
Dial B : AF GAIN /
Sub Menu : BASS, TREBLE, RF GAIN, SQL
Dial C : MEMORY
CHANNELS / Sub Menu :
Varies with mode (normally Passband Tuning 1 / Passband Tuning 2 / VSC
/ Backlight setting).
Many of the Knob
Sub Menu's can vary depending what mode you are in.
Metering is displayed using bar graphs and is selectable in the
following : Standard S-Units, dbu, dbu (emf) and dbm (same as with the
IC-R9500). Readings appear to
There is a 1/8 inch phone jack on the rear panel to add a mechanical
meter (8 volts maximum), not tested. This output level (voltage)
can be tweaked in the menus.
Not so "Cool" operation / Contains No
As commented earlier, extensive testing found the IC-R8600 to run quite warm
almost near HOT after a 3 to 4
hours of operation (especially at the marked regulated 13.8 DC volts, screen
saver off) ! VERY
IMPORTANT (PLEASE NOTE) : Test with SCREEN SAVER OFF , cabinet heat
test based in a non-air conditioned room during warm summer time conditions.
Being in a cooler operating environment cabinet heat will vary (be much
NEVER block the cooling vents on top of the set as indicated in the
manual page 2-1 !! Give it room to properly dissipate the generated
heat. Our recommendation is DO NOT stack ANYTHING on top of it
(including another radio or even a clock). See
the earlier comments on this page
to help reduce this slightly.
There is no cooling fan which is actually
extremely good news and no annoying buzz in operation. Having a fan
involved with a receiver (or in a transceiver in just receive mode) is
unacceptable to our standards.
One can just look at the actual
current measurements and
understand why the IC-R8600 operates VERY VERY warm to HOT (as compared
to the IC-7300 in receive which operates cold in comparison) !! The
real heat generator is the old IC-7600 HF Transceiver in just receive
ICOM IC-R8600 at 12.2
or 13.8 volts, Firmware 1.20, HF Band Reception
(revised info via Rob Sherwood, Sherwood Engineering)
Receive Current :
1.3 Amps +/- 100ma (modest clipping 1.4 Amps)
ICOM IC-7300 at 13.8 volts
Receive Current :
836 ma +/- 50ma
ICOM IC-7600 at
Receive Current :
2.7 Amps +/- 50ma
Proper “Tuning Knob” Steps / Other
Tuning Knob Details / No 1 hz Tuning With Knob / VRIT
With most current production YAESU
HF transceivers, the
“Tuning Knob” steps are extremely limited to just 10 or 100 hz steps in
SSB modes and 100 hz and 1 kHz in AM or FM modes. In the case of
the FT-450D this is even slower going (see my full
FT-450D review here for
those details). Yes…it can be a real “wrist wrecker” if you wish to
move fast using the main tuning knob.
it is with all current Icom HF
receivers / transceivers, the IC-R8600
more programmable steps for the “Tuning Knob”. So one
can adjust it exactly proper to the owners desires for normal
operation, which for us is : 1 kHz for SSB, 5 kHz for SW Broadcast and
10 kHz for MW Broadcast
(or can be 9 kHz outside North America). Better yet, each mode stores
it’s own setting. Icom does this right here…no contest in our view.
Selecting a faster or slower temporary “tuning knob” step is a breeze
as it is with all current Icom HF sets.
Yes, it can tune and display
down to 1 Hz as well. However the ONLY way to access 1
hz tuning was with "direct entry" using the keyboard or by using the IR
Remote control (as cover earlier in this
report). Even the programmable TS setting will not allow 1 hz steps. In
sharp contrast the IC-7300 does allow 1 hz steps with the tuning knob
(for 1 hz tuning steps the IC-7300 wins).
Tuning Knob optical encoder had a very good feel with no bearing slop
(downright zero). However it is not as silky smooth as the one found in
the vintage JRC NRD-545 receiver. Nor is our test sample as smooth as
the IC-7300's encoder. Again (I know
we already covered this, but have I been asked a number of times on
this subject...so repeating) is a "clicky" type (detents) knob out
of the box. There is to way select a "smooth" feeling knob
by moving the 3 position slider adjustment on the bottom of the knob
(it's not so easy to do however). So it goes from left to right :
"smooth loose - smooth tight - clicky".
It has some rotational play in
the "clicky" mode (but so does the IC-R9500's knob in "clicky " mode),
but overall it feels good and this knob scheme was well done.
There is a way to turn on a VRIT (Variable Rate Incremental Tuning)
with the tuning knob. Called "Manual Dial Auto TS". That is it speeds
up the tuning rate if the knob is spun fast by up to 5 times. This can
be most useful depending what tuning steps are normally used.
: Press and HOLD (touch screen) on the MHz digits for second and this
provides tuning in 1 MHz steps (little arrow will appear just above the
Proper Bandwidth Choices / SSB
Selections Could Be Wider / Useful S-AM modes (Is
It a True AM Synchronous Detector ?) / Manual
The IC-R8600 is near excellent
when it comes to available bandwidths. For AM mode the user has
continuously variable bandwidths from 200 Hz to 10.0 kHz available (in
200 Hz steps). Of course we love the excellent 10.0 kHz one when
conditions warrant. For SSB modes its from 50 Hz to 500 Hz (50 Hz
steps) and 600 Hz to 3.6 kHz (100 Hz Steps). As usual for Icom with
current production models, the widest SSB is limited at 3.6 kHz. This
is a bit lacking especially for manual ECSS use. We would have like to
seen this to least 5 kHz (or even greater). Of course we have the
3-bandwidth presets that add to the excellent ergonomics as well.
At first test we were extremely
disappointed that the S-AM
modes (AM Synchronous Detector)
seemed be exactly the same
as in the IC-R9500 (Firmware 1.20). In other words, it did NOT help
with AM mode fading
distortion. We have a bit better news on this after more testing. In
[double sideband], it's indeed a royal stinker with no
reduction in fading distortion and sounds funny (UPDATE : Audio quality in D mode has been improved with firmware 1.35 to our ears, see block below). When we switch to S-AM (U or L) [upper
or lower sideband], we are indeed hearing much less fading
Not that it does a stellar "yeoman's job" here as some distortion
remains and tends to cut off the high end slightly. But "finally" Icom
has at least a useful "quazi" Sync Detector
circuit to reduce
fading distortion on the LW/ MW and SW bands. Of course one can use
manual ECSS too (that is
zero beat in a SSB mode) which it does excellent with fading distortion
totally gone. However the SSB modes
have limited top bandwidth of 3.6 kHz as all modern Icom sets do. We experienced none of the bugs that
plagued OUR IC-7600 test
sample with manual ECSS use.
on the AM Synchronous Detector
(also see block below): Even with the so called Sync
being useful, just by the way it acts it does NOT appear be a "TRUE" AM
Synchronous Detector being used ? I say this as it never goes in a
usual "heterodyne" sound when in a out of lock condition like true Sync
will do when off tuned. The 'SYNC" light just flashes on and off with
no difference to the received signal. So its not all wine and roses
here, but at least you can set the bandwidth up to the maximum 10 kHz
value (unlike manual ECSS which is limited to 3.6 kHz).
Not only do we have a STOCK +/-
PPM TCXO for excellent
our test sample the display was also DEAD ON out of the box right down
to the 1 hz digit (this can be
tweaked in the Menu’s if necessary).
Presets Changed From Default in kHz (Firmware 1.35)
WIDE (FIL 1) : 3.6
MID (FIL 2 ) : 2.8
NARROW (FIL 3) :
WIDE (FIL 1) : 10.0
MID (FIL 2) : 8.0
NARROW (FIL 3) :
As it has been with previous models, we also have the “DSP Filter
Shape” adjustment for SSB and CW modes. SHARP and SOFT. We normally
just leave it in the default SOFT selection for our operations (sounds
ADC Overloading / Sensitivity /
Other Receiver Notes / FMBC in Mono / "REF Level" UP to + 5.0 db
When the receiver is hit with an extremely excessive input signal, the
icon will start to flash. Unlike “dynamic range” mixer
overloading that can occur with an analog superhet receiver, here it’s
the ADC (Analog to Digital Converter) that gets saturated and can make
the FPGA to do strange things when the OVF indicator starts to flash.
In our testing (with firmware 1.35) and antennas it took the
receive PreAmp (Note : It only has one receive Preamp, not 2 as with
the IC-7300) with
a SUPER strong station for this OVF indicator to start
to flash (or a extremely noisy band and or with local interference).
Turning off the preamp's cured this overloading completely in
OUR situation when it happened. However this scenario will vary greatly
of course. In extreme cases it could take the attenuation function and
or backing off the RF Gain control to stop it.
TIP : What
might sound totally counterproductive, we operated the the preamp and
backed down the "RF Gain" to help recover audio with down in the noise
signals on HF.
Is this a drawback to
IC-R8600 ? Strongly NO. Being this is a true SDR (on HF), this is the
just part of the technology at this price point.
does NOT have the "MW
setting in the Menu's as with the IC-7300. Long Wave (LW) performance
is MUCH improved over the IC-7300 transceiver (in fact it's night and
day). Internal preamps not helping the cause at all.
“IP Plus” function is
advertised to improve the Intermodulation
Distortion (IMD). Optimizes the Analog/Digital Converter (ADC) against
the distortion when receiving a strong signal. Third-order Intercept
Point (IP3) is also supposed to be improved (this feature was not
"side by side" testing the overall HF receiver performance and features
appear identical to the IC-7300 transceiver (PreAmp OFF). To equal the
"Spectrum Scope" sensitivity (Firmware 1.35) it was needed to adjust
Level" UP to + 5.0 db. Again
the IC-R8600 only has one RX preamp,
where the IC-7300 has 2 (PreAmp 2 is rarely used except above around 15
for our antenna's).
See our IC-7300 page for
more HF performance details (as those are indeed near identical, EXCEPT audio quality and LW/MW).
FMBC reception is stellar and
has excellent sensitivity and selectivity (only has one fixed bandwidth
in FM WIDE mode, 200 Khz). It is in MONO only (sorry no Stereo). Of
course on the FMW mode the AGC and decay rate are
not adjustable. But even with this small bug, we can already tell you
that it's pointing to a fantastic FM DX'ers dream set. Selectivity and
sensitivity are both outstanding including stunning audio quality that
has never been heard out of communications receiver. On the FMBC band
PreAmp use makes for a very noticeable improvement on very weak
VHF/UHF performance is another stellar showing of the IC-R8600.
Sensitivity and selectivity easily overtakes
any consumer "scanner" receiver (PreAmp ON). Of course one has to keep
(again) that this is NOT a scanner and also cannot do any trunking
functions. Even with that, scanning speed is extremely zippy and
provided priority and scan delay features. For all FM modes there a
well performing (but small) discriminator meter that pops up on the mid
left screen. P25 decoding quality is simply first rate as is the NXDN
digital decode mode also tested.
AGC / Weird AGC
Clipping Issue (Getting Swamped), FIXED with Firmware 1.34 and above
Three "preset" AGC settings
are available (expect for Wide FM) :
Fast, Medium and Slow. The decay rates are adjustable for each
Generally the AGC works
properly. However when tuning across a very strong
broadcast station you have to sit and wait like up to 5 seconds to wait
for the AGC to come back down to continue tuning. Also when listening
to a weak station ANY static (including local interference) also
triggers this what we call "AGC
bug. Happens with any broadcast listening (MW , SW or even FMBC) and
yes the AM AGC setting is at the fastest-minimum you can go (so
on AM mode at .03s). Indeed, this is a bit annoying. Using the NB makes
no real difference when local interference causes this (slightly).
Good news is this bug was fixed starting with firmware 1.34.
IC-R8600 AGC Decay Rate Changed From Default (Firmware 1.35)
To change the AGC setting (between
Fast, Med and Slow) you have to go into the "Function" Menu’s. No touch
available adjustment here. Another situation were the IR Remote Control
Clean Audio Quality / Tone
Controls / Internal Speaker / External Speaker Tests
General audio quality is EXCELLENT on
HF especially when manual ECSS or even the Sync Detector
is used. Punchy with ZERO
audio hiss and no DSP artifacts.
Even the virgin AM
mode is near
However it was not so great as out of the box (using the defaults). We
had to make a few setting changes to in the "Tone Control” settings to
make it sound proper (less muffled) and that information is below for
my ears (these increased tone control adjustments are a REQUIREMENT in
our opinion and of course will vary with other speakers
used......experimenting is the word here).
While the internal speaker sounds OK to our ears, however for most only
decent external speaker will satisfy (more on that also below). See
earlier comments in this report for our views with Icom's matching
speakers with the IC-R8600.
The IC-R8600 has much more extended Tone controls over the IC-7300 (in
fact it's a night and day difference). So
of course it has MUCH more richer sound especially with a decent external speaker in use. The
IC-7300 sounds TOTALLY flat in
comparison (so it is a totally different ball game with improved audio quality when compared to the IC-7300 as tested !)
IC-R8600 TESTING with FIRMWARE with 1.34 / 1.35|
|Improved in a number of area’s. Some of the fixes were undocumented in
the 1.34 / 1.35 update notes. IMPORTANT NOTE : As many already know Icom does not necessarily list all bug fixes / changes done with any given firmware update.|
- First the NR (noise reduction) has been improved. Going above
setting sounds no more like“R2D2”. NR is now a useful feature whereas
before it was a utter disappointment. It now operates similar to the
IC-7300’s NR performance.
- The “AGC swamping bug“(that I call it) issue when tuning across
super strong signals or strong static bursts has now been fixed with
1.34. Excellent news here and appears to have also improved weak signal
- I detect a slight added Bass kick with broadcast stations that
it (most noticed on the FM Broadcast band) with our classic Realistic
Minimus 77 speaker. Yes we do indeed set the “Bass” tone setting up to
maximum (+ 15) on AM/FM and SSB modes.
- After extensive testing, HF audio distortion while slightly
than 1.33, was still the best with 1.32. So if you want the lowest possible audio distortion on the HF bands, we say go with 1.32
even with the AGC swamping still present.
(Please Note : A downside with
firmware 1.34 / 1.35 in testing was a LOUD SHARP POPPING sound when tuning across
strong signals WITH THE SYNC ON
(MW and SW frequencies), or with very strong local interference
noise. This ill can be reduced to an extent by switching to a slower
AGC setting. Using the older 1.32
firmware this is not a problem at all . It seems that this bug is slightly
worse with 1.35 but is not a disconcerting issue unless one is dealing
with excessive local interference.)
- With OUR hands on testing when using the SYNC "D"
mode (uses both sidebands) the general audio quality was fuzzy and
inferior (+ more fading distortion) when compared to the L or U
SYNC settings. Using firmware 1.35, "D" sounds more acceptable (mind
you still not excellent by any means for deep fading distortion) and
more sharper audio recovery. So if you are NOT dealing with an
issue, try and use the D setting
with the SYNC function (1.35 firmware). However this still does NOT change the
fact that the IC-R8600's SYNC is NOT using a true "Synchronous
Detector" scheme (mediocre "Synchrophase" Detector ?), but is still better than no "SYNC" at all. Please read this excellent PDF document from Kiwa Electronics via "Fine Tuning" Proceedings "CLICK HERE").
NOTE : These observations were made using SW Broadcasts, S-AM (D, U or L) mode and
(maximum) bandwidth with the "2 Way" Realistic Minimus 77 test speaker
(catalog number 40-2054). Bass and Treble both set at +15.
Please make note that changing the
tone control settings also changes the built in SD card audio recorder
well (more below on that feature). We are unable to recommend
any SOLID "tone control" settings here, as that will vary greatly with
the speaker used.
IC-R8600 Tone Control Settings (Realistic "Minimus 7" / "Minimus-77"
Speakers, Firmware 1.35)
Broadcast 10 kHz Bandwidth)
Treble : + 15
Bass : + 15
(HF Bands, Amateur
3.6 kHz Bandwidth)
Treble : + 11
Bass : + 15
: + 13
Bass : + 15
The list of
tested "Classic" Die-Cast speakers with the Icom IC-R8600 : (*- winners)
- * Realistic Minimus 7 .
Cat 40-2030C [Date Code 6A2 (June 1992), made in Malaysia. Near
end of production] 4 inch woofer.
- * Realistic Minimus 77 [BEST] .
Cat 40-2054 [Date Code 9A1 (Sep 1991), made in Korea. Last
production was made in Malaysia in 1992 and appears did NOT use a "foam" woofer ?]. Larger 5 inch Woofer over
other 2 models listed here.
- Centrios 4012000 Similar
to the Realistic Minimus 7 in size and layout, but sound has less Bass,
made in China. It’s 4 inch woofer surround is foam instead of the
rubber one as in the Realistic 7’s. Was sold by “The Source” in Canada
up to around the early 2010’s.
Extensive testing with 3 models "well cared for" classic mini
"2 way die
cast speakers " with the Icom IC-R8600. The receiver's
internal 2 Watt audio amplifier drove all 3 more than adequately. All
of these speakers are discontinued and one will have to hunt on the
ebay). Our preferred speaker with the IC-R8600 is the classic Realistic Minimus 77 two-way “hi-fi”
model. WARNING :
The Minimus 7 was made from 1978 to 1992 by various
contract manufactures for Radio Shack (watch for degradation of the
surrounds on the woofers). Best to ONLY locate the latest C version
Malaysia (1992) and hopefully has not been abused by previous owners
(and or modified) !!
In the case of ALL speakers we added 4 vinyl stick on feet (not
felt).The Minimus 77 can also suffer from foam rotting issues
it's woofer (later production did not use a foam edge woofer, details
The clear winners here was with the Realistic Minimus 7’s Cat
40-2030C and the Realistic Minimus-77 cat # 40-2054. With the larger
Minimus 77’s for a bit more bass
response. The Centrios 4012000 clone was good too. Not as much bass
response (and different sound in general), but OK. Some have
said this speaker was an identical clone speaker of the Minimus 7, that
is simply is NOT TRUE in our side by side testing !
Favorite speaker with
the Icom IC-R8600 receiver is the classic
Realistic Minimus-77 Catalog Number 40-2054 for
excellent Bass response.
(alternative model : "Minimus 7" Die-Cast 2 way model - Catalog Number
40-2030C) . Look out hunting on the used market as age can eat away the
rubber surround (foam on the Minimus-77). Best to find a
Minimus 7 "C" version that was at the end of
production (Malaysia 1992). It was made between 1978 and 1992 by a
number of Radio Shack contractors / countries. (N9EWO Photo)
SD Card Slot with
“Off Air” Audio Recorder / Jamming In Slot / Line Output / Speech
Icom’s super expensive IC-R9500 wide
band receiver features a built in audio digital recorder. There are a
multitude of quality settings; some are great while others at the
bottom are totally useless. In the case of the IC-R9500, it records to
the old standard “Compact Flash” card via a trap door located on the
REAR of the set. It's NOT easily accessible as you need a screwdriver
to it and a pair of needle nose pliers to remove it. You can read
my full IC-R9500 review here.
Well the IC-R8600 also has such a
feature too as does the IC-7300 HF transceiver. It records to it's
FRONT MOUNTED "standard size" SD card, so much easier access. One can use up to a 32 GB
size card (DO
NOT TRY AND USE ONE THAT IS LARGER !). It needs to be formatted
(in the transceiver) before use.
This also adds a number of required folders on the card.
Of course this was an exciting part
of the receiver. PLEASE NOTE : The
IC-R8600's record quality is
improved over the recording rate found in the IC-7300 (it's not at the
same rate as you might think), so is a better sounding performer here.
going to match using our outboard and discontinued
PCM-D50 PCM digital recorder via the rear mounted line audio
output jack. The Sony of course does a better job but is more of a
chore to use.
INTERNAL "WAV" RECORD FORMAT
/ IC-R30 / ^IC-705 INTERNAL "WAV" RECORD FORMAT
(^ - info verified via Thomas Witherspoon)
The single "lone" WAV format
still limited at 16000 hz. It’s a excellent
feature to have in any event and could have been much worse as with the
old Icom IC-R20 receiver.
Allows for audio capture of something off air FAST
that may have not have been without it. We tested up to a near 2 hour
continuous file without
any problems (but not recommended...I say best to keep a file to 1 hour
maximum , start a new file). You can play it back in the receiver along
forward / rewind feature. Or remove the card and easily transfer the
file to the computer for
playback or for conversion / archiving. It marks the recording with an
excellent date and time stamp (starting at the second).
Appreciated was the use of a better
quality type SD card socket, that is it “clicks” into place and when
also removed. IMPORTANT NOTE : When removing a SD card and the
receiver is ON, one MUST “dismount” the card (located in the menus)
just like with a computer.
However one issue
IC-7300 HF transceiver testing
(and are not alone on this), was with a San Disk 32 GB SD card (SDSDUP-032G-T46) as
jammed up in the slot. Could not click it back out. Some may say we
inserted it in crooked…no No NO…that
is not the case. Were able to
get it out safely without any issues. When using other cards (we
Disk and Samsung brands)
this issue was not there. Have yet to
find out what was going on here (ever so slightly warped
card ??) NOTE
: We did not have this bug occur with the IC-R8600 at time of this
report (but others have, info via the IC-R8600's "Groups io"
list). One also
stores the user settings
/ memory channels and the screen capture pictures on the SD card.
Also available on the rear panel is a standard 1/8 inch phone socket
for audio "Line Output". Level
is set at default 200mv (50%), and is
adjustable between 100 to 300mv's at 4.7K ohms impedance (in
CONNECTORS Menu > / AF Output Level). In our testing we found
this needed to be
turned up to around 80%
to work properly with other
external recorders (digital or analog). IMPORTANT NOTE : At 100% we
detected excessive distortion more so with SSB signals. Keep in mind
this also adjusts
the level going to the USB cable, so if ones uses this transceiver with
that function it's going to effect that as well. Again we must stress
the Bass and Treble
controls DO effect the Line Audio output. This output can also be
programmed "receive IF (12 kHz) signal output" (not tested).
note that the included excellent "Voice Synthesizer" (speech) feature
does stamp the recording (either using the built in audio
recorder OR via the Line Output jack). There are a couple different
ways this can be selected onto the recording.
In the Set menu find : FUNCTION> SPEECH>SPEECH Output for
Recording (see page 11-3 in the owners manual). Excellent !!
Regular Memory Channels / CS-R8600 Programming Software
The IC-R8600 has 2000 regular memory channels in 100 groups (OK lets
call then banks),
200 Auto Memory Write Channels, 100 Scan Skip Channels, 50 pairs of
Program scan edges. Of course that is many more over the IC-R8500 or IC-R9500. One can add
a 10 characters alpha tag to
each entry including one for each group. Here the touch
screen makes for extremely easy entering of
the tags. However having the CS-R8600 Cloning Program is a very
optional accessory even if priced a bit stiff (more on that next), we
say it's a must have !!
TIP : The "M-CH DIAL" button is used to tune a "Memory" channel (for
those who do not read the owners manual, this will not be quickly
the White LED OFF
the MAIN dial tunes frequency (DIAL) and the DIAL C encoder will still
adjust the MEMORY CHANNEL. With the LED on, both tune the Memory
Also tested was the CS-R8600 optional "Cloning Software" with the
and is excellent. It's GUI is extremely well done and can even adjust
font size for not so great eyesight like the author. It has cut and
paste / insert / move an entry up and down. Actually found this
software to be one of the best we have EVER tested with any radio ! It
includes a Print function and that can be for all or just one Group. UPDATE :
However it's print function is not so great in testing as as it can't
print entire channel information on one page and waste paper to
unreasonable limits ! Instead used screen shots of the GUI "pre-print"
screens (landscape output) and printed
the .jpeg's of the desired pages. This workaround works even if a major
chore to make happen.
CS-R8600 "Cloning Software"
Installation Tips (IMPORTANT NOTE :
This is based for the original "version 1.0" of the software.)
#1 : Load the USB driver
(located on the CD-R) FIRST before one plugs any cables in.
Install the actual software (setup). It's takes a bit for it to
complete once it gets going (so be patient).
#3 : User needs to enter the
user name and serial number properly as indicated in the manual when
that screen appears (serial number is more than just the serial number
on the CD-R, product CD ID numbers come first). I left the "Company
Name " blank (optional).
#4 : BEFORE one plugs in the USB
not included, I used the front mini-USB one), owner
MUST install the new 1.20 CS-R8600 software update (that
is if the owner did the 1.20 firmware or above update). If you pass
this step the program will NOT work (with firmware 1.20 or above
#5 : With the USB cable connected, our host computer created
the HF bands, so be sure and properly disconnect the cable once the
data has been transfered.
Programming files with a older version (like 1.01 or 1.02) are NOT
compatible with a the latest 1.20 version. It may sort of work, but
weird things can happen I guess ?? So it is very important
for all CS-R8600 users to update to the latest 1.20 version and update
to the 1.20 (or above) IC-R8600 firmware before. Please Note : there are different
firmware versions for USA and non-USA..
Improved with firmware 1.34 /
Noise Blanker / Notch Filter
(NR) feature on HF with firmware 1.34 tested to be most useful. Before
was a disappointment (LEVEL 2 was as far as one could go otherwise it's
awash with digital rubbish). Now one can go well past 6 and still
filtering has auto and manual settings and par much better. To adjust
the manual notch (MN) the MULTI
knob is used. This takes a bit getting used to. But for most Notch use,
the Auto one works just fine (AN) even for broadcast use. Noise Blanker
is a mixed bag as they usually all are (depending on local conditions).
But it can be most useful and is fully adjustable to conditions (Level,
Depth and Width).
Updates / Includes a FULL PRINTED manual
Firmware updates are accomplished via
the SD Card and could not get any easier. One process does all the
updates (Main CPU, Front CPU, DSP Program, DSP Data and the FPGA). This
is in sharp contrast to Yaesu’s way of going about Firmware updates
One of course needs to follow
instructions and understand them TOTALLY before it is attempted. When
one gets to the final screen: “Do You Wish To Start The Firmware
Update”, be sure and tap and HOLD on the YES icon for at least 1 second
otherwise it will not start it. This one is very easy to miss in the
manual (but it is indicated properly).
Speaking of the owner’s manual, there
is a FULL PRINTED one included (excellent). However no CD-R manual was
included with the early production test sample (the IC-7300 came with a
CD-R manual in the box).
No Schematics / Internal Pictures
Icom does NOT provide ANY (detailed or even basic) block diagrams
or schematics included with the receiver. One must purchase the Service Manual separately.
If you view the IC-
R8600 Fenu Review (click here),
they provide a number of excellent internal photo's of the receiver.
Eric Cottrell removed the cover off of his IC-R8600 and had this
interesting observation with it's speaker and 4 unused mounting posts.
"I noticed they are
using a ported speaker (see photo below). There is a hole next to the
speaker and a black plastic enclosure on the backside of the speaker. There is also 4
mounting posts on the speaker panel. Maybe there will be a future
option board ? There are two populated unused connectors on the main
board. I also noticed a number of places for connectors that are not
Speaker uses a ported design (plastic baffle around the speaker).
There are 4 unused
mounting posts on the speaker's bracket.
Who knows if down the road Icom will make use of these posts with a new
option ? (Eric Cottrell Photo)
Real Time Clock.
IC-R8600 has an
excellent built in clock and is displayed in the upper right hand
corner of the
LCD. The chassis also contains a soldered in place ML414H
so it backs up the clock settings for a short
period (say during power failures). How long this backup battery
operates before it dies was not tested (1.0 mah capacity
rating). NOTE : If one leaves the receiver with no DC power connected
(even when OFF) , in a couple of days the internal clock will need to
Screen Saver. Can
be set for OFF, 15,
30 or 60 (default) minutes. We left this set at the default 60 minutes
and feel that should be used in normal operations. It totally shuts the
backlight off if the time elapses with no control or knob being touched
(has no moving display like with the IC-7600). When the screen saver is
in operation, the blue power LED flashes.
DRM 12 kHz output (not
tested). From page 16-1 in the manual : "You can change the Line
Output" jack to IF, then transceiver outputs a 12 kHz IF
signal from this (and the USB). In that case, you can listen to the DRM
with the application software receiver that is installed into your
PC.". This of course would be the free DREAM software.
is using the smaller
1/8 inch size. This is a plastic type jack being used here. Some I’m
sure will not prefer this size, but being it’s such a small footprint,
I don’t find it to be a drawback. The AOR AR7030
and Yaesu VR-5000
receivers both use the smaller 1/8 jack and work fine here.
more suited for modern headphones, which always use this size these
days anyway. It is a stereo type jack being used as well, so no
adapters are required.
Screen Capture Feature.
capture a LCD snapshot by tapping the POWER button. NOTE : This feature
turned on as default. File is saved to the SD card and as a BMP or PNG
type photo (selectable). See actual captured photo below.
2 USB Ports.
as it is with the
IC-7600 and IC-7300, there is a real USB port for direct computer
on the rear panel (audio and control). Not tested for this
review.There is also FRONT mounted Mini USB one as well. We
used this for the CS-R8600 software and worked just fine. As
usual, it requires
installation of a driver before use (uses 2 COM ports).
SDR I/Q output. With 1.30
firmware and above allows I/Q
output from it’s rear jack.
for the host computer is also required. Works with the HDSDR program. Also the RC-28 "knob" can be also used with the
HDSDR program as well on the
host computer (I/Q output was not tested). Tip
: Use a high quality USB cable
and no longer than 6 feet (2m) to host computer.
Best Icom Receiver Ever as Tested To Date - "Wide Band" or Not
(as this report was typed)
not been able to test the IC-R8600 up against the super big modern HF
transceivers (Icom IC-7851, Kenwood TS-990 or any Flex /
Elecraft etc.). There is no budget for that and never will.
"Wide Band" or as HF receiver,
would rate the Icom IC-R8600 well
above the super expensive IC-R9500 for
display performance. Even beats out all other HF Icom receivers of the
past in testing over the years (and we have experienced them all). For
it's overall performance is just stellar in our testing aside from the
LCD touch screen madness that I just don't care for. Some will say it's
identical to the IC-7300 transceiver (minis the transmit). Well for
overall HF receiver performance
it most certainly is, but as we covered above it definitely is NOT with
audio fidelity ! Please see N9EWO's
© N9EWO, all
IC-R8600's "Screen Capture" feature at work and also shows
our change to "no-fill" part of the
spectrum display to make it look
more “old school” (to no fill at all and a green line). When "Screen Capture"
switched on in the menu's (default is off), a TAP of the POWER
button saves the
currently viewed screen to a PNG or BMP file (also selectable in the
onto the SD card. Works well however some parts are on the fuzzy side.
Even in the record mode the screen capture worked at the
same time without a hitch. In this screen capture it is showing the maximum size
one can view the "Spectrum Scope" using the EXPD (Expanded Screen).
This takes an adjustment in the Spectrum SCOPE SET Menu >Waterfall
Size (Expand Screen) (page 4/5) to Small
(default is Mid). Sorry, there is no way to totally turn off the
waterfall in the EXPD screen. For more information
on our "Spectrum Scope" changes please see the chart on the bottom of
this page. (N9EWO
|N9EWO's Icom IC-R8600 "Wish List"|
doubtful any of this will ever happen, here is N9EWO's "Wish List" of
improvements and tweaks to the IC-R8600's firmware
for MW / HF USE that we would like to see (below 30 MHz). Many will say
bandwidth's above 10 kHz are totally useless for MW and HF listening
(N9EWO says different).
- Provide a
- Make the RC-28
(Remote Encoder Knob)
operate with the IC-R8600 standalone (without ANY computer connection
as like with the IC-7610). I would understand an additional interface
box and or cable / accessory may be required for connection to the the
Improve the ["Synchrophase" ?]
"Sync" Detector fading distortion
performance. Better yet make this a TRUE "Synchronous Detector".
- Allow 1 Hz
tuning steps with the tuning knob (now only accessible with direct
keyboard entry or computer / CI-V control). The lesser IC-7300 HF transceiver
can tune 1 Hz steps with the tuning knob.
Wider Bandwidth Selections.
- Increase AM Mode
bandwidth up to 12 kHz (or better yet 16 kHz). For MUCH improved audio
with good band conditions.
SSB Mode Bandwidths up to 6 kHz (or better yet 8 kHz). This would
improve manual ECSS audio by leaps and bounds.
Links for Additional
IC-R8600 Information (All Subject To
Change Without Notice)
- Sherwood Engineering IC-R8600 Lab Numbers and Report (PDF Format)
Icom America IC-R8600 page
ENGLISH PDF Brochure
ENGLISH PDF Manual
Radio English Review (includes internal pictures)
- eham Reviews - Icom
- eham Reviews - Icom
Service Center Michigan
Review November 2017 QST (PDF via Icom America's web site)
- eham Reviews
- Sherwood Engineering "Receiver
that we feel are worth the link below :
Decoding DMR With
Your Icom IC-R8600
- Introduction of Its
Operation (including the Sync Detector)
JRC NRD-545 Part II
MW Band in Japan
- Radio Sakha 7345kHz
(using Sync Detection)
- Medium Wave
Reception in Japan
- FM Reception in Japan
Performance of the
Operation of Filter
9875kHz VORW Radio
International (with S-AM(U) on)
- First Impressions
in Europe by Fenu-Radio
Operation of Synchronous Detector and TWIN PBT
- SDR DDC приемник
- General Video
- TX Factor (UK)
|Simple Feature Comparison List :
ICOM IC-7300 vs. IC-R8600 (as a HF SWL Receiver)
- 1 hz steps with tuning knob.
- Less AGC swamping (current firmware)
- Larger tuning knob.
- Tuning Knob has "rotating" finger spinner.
- 2 Preamps ((IC-R8600 has one).
- 2 VFO's (IC-R8600 has one).
- Quick "Memo Pad" function.
- Band stacking memories.
- Lower current consumption.
- Cooler operation.
- Actual front panel noise reduction / noise blanker / notch / preamp buttons.
- Separate PBT / RF Gain / Squelch knobs.
- Less than HALF the cost of a IC-R8600.
- FREE Memory Management Software (non ICOM).
- Wider "Spectrum Scope" span width.
- Syncrophase Detection (Selectable Sideband).
- Better AM Mode audio quality (increased bass response).
- 3 antenna Inputs with front panel selection.
- Timer functions.
- Mechanical S-Meter jack.
- 1000 total memory channels (IC-7300 is 101).
- Smooth or Click step tuning knob.
- Better quality recording (with internal digital recorder).
- Backlight on-off function.
- Network operation / jack.
- Standard phone jack audio "line output".
- IQ output jack.
- FMBC coverage.
- Less bulky DC power cable.
© N9EWO, all
N9EWO ICOM IC-R8600 "SPECTRUM SCOPE"
Version "Click Here")
Steve Ellington N4LQ
IC-7300 data as a base, but is not exact)
SCOPE - WATERFALL CHANGES
Scope" Settings Menu : (press and
hold on touch screen) " EXPD / SET "
settings as below ,
all others are left at default)
** NEW SETTING **
CENTER Type Display
Carrier Point Center
FILL + LINE
Waveform Color (Current)
R : 172
G : 191
B : 191
R : 0
G : 0
B : 0
Waveform Color (Line)
R : 56
G : 24
B : 0
R : 0
G : 255
B : 0
Waterfall Size (Expand Screen)
Waterfall Peak Color Level
Important Note: Be
sure that the “VBW” (page 2/4) is
selected on NARROW also located in the “scope set” menu (Default is
* - This will
allow for the largest viewable “Spectrum Scope” (when in “Expand
: To equal the IC-7300 transceiver “Spectrum Scope” sensitivity with
the test sample
(tested at 30 MHz and below), the “REF Level” was increased to +
5.0 dB (firmware 1.35).
Icom IC-R8600 LCD Failure Reports
is just as a FYI only and does NOT mean that there are any excessive
numbers of IC-R8600 having display issues (yet anyway) ! Have now seen 5 different LCD failure reports with the Icom IC-R8600
receiver. Some may very well be operator error and or connected with
firmware bugs (or improperly being used) ? We simply do not know.? One
important feature for owners to remember is there is a quick way to
shut off the backlight (toggle) by press and hold the front panel P.LOCK button (white LED turns on) .
Seems like some of these have the POSSIBILITY of occurring ONLY when (or
have been) connect to a computer ? We have not made any connections to a PC here
with the HQ test sample. Exception are fast and temporary PC connections to ONLY
program memory channels with the excellent and stable ICOM CS-R8600 software (we
have NEVER used the reported extremely buggy and SLOW WCS-R8600 RT Systems software) ?
reports via Radio Reference :
report via “IC-R8600 Groups io” (need to be registered to read this , but
pasted the general text below on this one). More than one report of this one
happening as well.
“Greetings, I'm having
an issue that is intermittent. My r8600 radio seems to lose signal and the
waterfall disappears at times. When this happens, I switch antennas and
sometimes that works, but now i have to turn off my r8600, wait a few seconds
and the signal and waterfall is restored. This has happened ever since I bought
the r8600 last year. I first thought that the r86000 was being overloaded or
desensed somehow. Now I no longer used SDRC while using my r8600 and just using
the scope for my monitoring. I thought that the computer was overloading the
r8600. However sense not using the computer while monitoring
I still experience the gradual waterfall and signal fade. Anyone else
- Joe D. from the USA checks directly to us
with his IC-R8600 LCD failure information as below (March 2021). In his case the
display did not go dead, but just quit responding to touch. Icom repair
in WA USA had to replace out the entire LCD module. The serial number
was from the "first lot"
of USA 02 cell blocked versions. His was out of warranty by 2 months,
but Icom America replaced the display at no charge (how nice of them).
Cost for the display and labor would have been just a few dollars over
$ 200. USD (not including return shipping).
"I use the tip or side of my finger
on the LCD. The real buttons & tuning knob did work, only the
screen stopped responding. When the problem first began, only the upper
left area did not respond. Then that cleared, and the unit worked fine
for a few days, then the whole display did not respond. I left the
radio off and disconnected the DC power cable for a day and
turned it back on. After a couple of hours the screen started to
respond and it was fine for about another week, and then that was it,
there was no response no matter what area of the screen was touched."
Is this starting to appear like a chronic failure
issue here ? As we have stated in the review above NEVER stack
any other radios or accessories on top and give the receiver cabinet
area to properly ventilate the heat it produces (don't place it
underneath some enclosed cabinet area either).
Of course you can bet we will keep an eye on this. So if YOU have also
have suffered a LCD module failure with your IC-R8600, lets hear from
you ! Our email is on the main page). "Thank You ".
© N9EWO, all
Icom IC-7610 Fan Operates in just "Receive
Only" Use !
The Icom IC-7610 "Direct Sampling" SDR HF Transceiver's receiver section draws around "3+ amps" of
current just as with the
elder IC-7600 model did (via
information as indicated
in the brochure). We of course
had a gut feeling that the fan
would operate in just RECEIVE use ??