A good effort and nothing more, the large TECSUN BCL-2000 / Grungig S350 harks back
to
the Panasonic RF-2800 that I owned back in the late 70’s with it’s
beefy size
and POWERFUL audio section. However it also comes with the same bugs,
namely drifty
and very touchy tuning. With a few new added gremlins
like
single conversion with “whistles” that excessively irk into
the reception
of worldband and medium wave signals makes the set a real TURKEY !
But would make a decent garage radio with it's very powerful audio.
The later updated / improved Tecsun BCL-3000 / Grundig-eton S350DL model was not tested. (N9EWO Photo)
Country of
Origin : China
Serial Numbers (Two samples tested for this report) :
Test Sample One (Tecsun BCL-2000) : Not documented
Test Sample Two (Grundig S350) : S35050716691x
Test Antenna's (outdoor) :
RF Systems MLBA-MK2 long wire (55 ft length - 24 ft height at peak)
Comet H-422 Dipole (24 ft height - Straight Configuration)
(indoor : 20 foot wire clipped to whip)
N9EWO's
Review on the Tecsun BCL-2000 / Grundig S350 receiver
Discontinued Receiver
PRO:
- Extremely pleasant and LOUD audio quality with separate bass and treble controls
, along with a large speaker that does not buzz in any way.
- Very quiet
circuitry with no PLL noise ,being that there is no synthesizer on this
set.
- 2 well chosen bandwidths that work well (see con).
- Much above average whip
sensitivity, especially at this price point.
- LCD display very easy to
read with extra large digits and proper contrast with a superb dial
lighting.
- Tecsun version features a internal 220 VAC power supply (missing on Grundig S-350 version
of this set).
- Tuning and battery LCD indicators (see con).
- Line Output
jacks (see con).
- RF Gain Control.
- FM pleasant with above average capture ratio and FM
stereo indication on LCD.
- FM includes an AFC off position.
- Sturdy
long telescopic antenna that also swivels.
- Beefy 4 “D” batteries used for
portable use, requiring fewer changes.
CON:
- Being a non PLL
synthesized receiver, lacks memories.
- One of most unstable sets that we
have come across in many years (15 kHz drift in 30 minutes cold).
- Tuning
uses old fashioned variable capacitors and dial strings to make
scanning the bands a chore.
- 90-minute operation maximum per session
until one is forced to turn it back on again to keep operating.
- No SSB
mode.
- Spurious heterodynes (whistles) mixed with received signals
across the entire MW and SW bands covered.
- Poor image rejection with
its single conversion circuitry creates images 910 kHz from original.
- Frequency display off by 3 kHz (noted in wide bandwidth).
- FM stereo
only available at “line out” jacks (not at headphone jack).
- S-meter bar
display a bit deceptive (see text).
- External 6 VDC input jack has a
negative tip (+ tip is the standard on most electronics today).
90 Minutes at A Time
Just as it is on many other Chinese sets, this radio also
has the “always toggled” dreaded 90-minute sleep function. And again
you cannot turn it off, you are stuck with it. Hope that it does
not shut off in the middle of an important news bulletin.
I guess the plus side is you will never leave this set on and walk away
for very long when operating with batteries. But what if you are
operating with external power? Thank goodness this was not a trend for Tecsun.
A Few Steps Backwards..
This early Tecsun entry into the world band radio show has no memories, no
scanning, and have to deal with band changes …we indeed are stepping
back a few notches in technology. Uses “old fashioned” variable
capacitors with dial strings for tuning but with a frequency counter to
see where you are tuned in the shortwave jungle.
Nostalgia from a Set of The Past, But Copied A Bit Too Close Perhaps ?? Drift and Not so fine tuning.
Ok, I will admit it I owned a Panasonic RF-2800 in the late 70’s. Was
an interesting and exciting set for the day as it had a frequency counter the used
LED’s to see where you were tuned. It was the first portable set at a
reasonable price to include this (a tad over $ 200.00 USD if I remember
correctly?). So was welcomed with open arms.
The Panasonic was very frustrating for me however, as it drifted a good
5 to 10 kHz (sometimes more depending on room temperature) even in a
few minutes time. So it was not used as much as I would have liked. It
made the SSB feature totally useless on that set. It sat in closet more
than on my radio shelf.
The bad news is the TECSUN BCL2000 / Grundig S-350 inhibits the same nasty drift
problem if not worse. I logged a 15 kHz drift in a 30 min period at 15 MHz. This is really a nasty gremlin that should not be a 21st century
set at all.
And to make matters even worse, the capacitor based tuning, which uses
old-fashioned dial cords and shafts…is like tuning a rubber band. One
is forced to tune back and forth a number of times to zero in on a
worldband signal. Panasonic at least used gears and grooved hard rubber
belts instead of dial cords for a bit more reliability, and the effect
was a bit better than on this Tecsun / Grundig receiver for tuning ease. But the drift
is as equally nasty (if not even worse)
Between these two problems makes one reach for a couple of
tranquilizers after a time using it. One usually zips right past a
desired station even when using the “fine” position. So back and forth
tuning is required before one lands on the target. The FM band has a
selectable AFC which helps keeps the the drift more at hand.
No SSB to be found
Just as the name on the front panel indicates “Enjoy Broadcasting” (Tecsun BCL-2000 model) , we
have no SSB mode. At the price point these receivers are at this can be
expected.
Internal Power Supply? (Not So Fast), “D” cell operation
The first test sample (early production of the TECSUN BCL-2000) included a internal power
supply (220v), which is a excellent idea and most desirable. But it’s close cousin sold in the US, the Grundig S350 used a
external “Wall Wart” supply. This to me takes a bit out of the
“neat-o” part away from the set.
I like the “D” cell operation, which will of course give for many hours
of operation, especially with no synthesizer to power ans less current draw. But of course on
the down side makes for a larger set, which these are indeed.
Frequency Display Off 3 kHz in Wide Bandwidth, LCD Good Contrast and
Digit Size, Super Back Lighting, S-Meter a bit more limited than what
appears.
Here
is a strange finding that I first experienced with a worldband set. The
counter that is used to display frequency was observed in our test
sample to be off by 3 kHz (high) when in the “Wide” bandwidth. In
“narrow” bandwidth it seemed to be pretty much dead on. Later Tecsun sets
also suffered from this WIDE filter bug, but with the S350 second test sample , for
some reason the sensitivity also dropped in the WIDE filter selection (aging
IF
filter ?).
As far as the LCD goes, let me say that the digits are nice and big
with above average contrast. The LCD lighting has a well-done toggle
on/off switch. All here was a real treat to my eyes.
With the backlight button, tap it and stays on for 5 seconds and then goes out. If
you push and hold it for a second, it will then stay on continuously
(well for 90 minutes anyway).
Bar s-meter on the LCD is a real plus. However it’s does not have
as many bars as one might think at first looking at it. It appears that
4 steps exist, 2 appear for each s-meter reading (8 bars).
Very Nice Audio Quality, Good Bandwidth Choices
Here is the major "good news" with the BCL2000 / S350. The audio is not only
LOUD and at low distortion, its also nice and clean with the lack of a synthesizer and PLL circuits, but has
the right balance of punch and with separate Bass and Treble to makes
it most pleasant indeed. Even with the bandwidth control in “Narrow”
position sounds better than with many sets in “wide” bandwidth. Speaker magnet is HUGE !
Speaking of those filter bandwidth’s. The two provided are well chosen, and supports the above average audio.
Spurious Heterodynes (whistles) Mixed with Received Signals, Single Conversion Adds Another Problem
As one tunes around with this set, it will show it’s spurious
Heterodynes (whistles) almost immediately across the entire range of
the set mixed in with received signals. This reminds me of low cost
pocket am radios from the 60’s and 70’s.
The make that problem even worse, (and might have a play in the problem
above?), single conversion circuit is being used and the usual 910 kHz
images appear (IF is 455 kHz).
Above Average Sensitivity, Sturdy Telescopic Antenna with Swivel, Dynamic Range average for a set in this price area.
We experienced a way above average whip sensitivity.
For many this will satisfy and no additional antenna will be needed.
Its telescopic whip is a good L-O-N-G one too with a good feel and with a
swivel to boot (It does not clip worth a hoot to the case when
de-telescoped however). A set of external antenna posts (it’s not a
jack) can be found for the MW/SW bands in the rear of the set.
Dynamic Range with the medium wave range of the set was not a problem
(other than the “whistles” across the entire band). Well perhaps not
quite, I did experience SW 49-meter signals bleeding in on the MW band
(nighttime monitoring).
Dynamic Range on SW with the whip was ok, overloading did appear on the
49 meter band at night just using it’s own whip (not excessive). On a
short external antenna (25 foot wire) , overloading was indeed more of
a problem (on all bands now), and most of the time the switch marked
“SW LPF” on the right side of the set controlled this overloading
nicely. It appears to me that this is actually an attenuator switch and
is incorrectly marked? There is also a RF gain control to help squash overloading when it happens.
The use of an AC adapter did increase the overloading factor a bit more.
Audio Line Output, FM Stereo but not at Headphone Jack
Fantastic to see a true line output on the right side of the set. Set
up for not only MW and SW and is used for the left and right outputs of
the sets stereo decoder. In fact this is the only way one can hear
stereo, as the headphone jack does not provide for stereo listening
(this was provided with the improved BCL-3000 and Grundig S350DL models, not tested)..
If one does plug in a pair of stereo headphones, you will indeed get
audio from both ears, but is in mono only. Obviously a bean counter at
work to cut costs here. This is really unacceptable.
We do have a great “Stereo” indicator shown on the LCD. A stereo-mono switch can also be found on the right side of the set.
Good set for the audio.
I
enjoyed the audio on this set along with a very easy to read LCD,
however the other gremlins as covered above leaves a sour taste in my
mouth. But for someone who likes to take a step back and at the price
the BCL2000 / S350's were at, might be a fun set. A shame that the very excessive
drift and poor tuning gets in the way. Unless one can grab one these in
the used market for a very reasonable cost...best to get a more modern receiver without the crazy drift.
UPDATE COMMENTS:
The MW in the daytime is much more tamed vs nighttime. I'm guessing SW signals really slam the MW section at night ??
Also if I giggle the SW band switch just a little bit (but not actually
switching it) , I can see the LCD frequency counter (and the received
signal) bounce all over the place. But of course one does not use the receiver this way.
Dave N9EWO
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