Subj: IC706 Review by KG0HW from internet From: SM7VHS@SK7QJ.G.SWE.EU IC 706 Review by KG0HW. Copied from internet by SM7VHS /Martin @ SK7QJ ----------------------------------------------------------------------------- ICOM IC-706 HF/VHF AMATEUR RADIO TRANSCEIVER Product Review, Hints and Tips, and Modifications As Of: December 28, 1995 by Randall Rhea, KG0HW OVERALL IMPRESSION "Too good to be true". This was my understandable reaction to Icom's announcement of the IC-706 amateur radio transceiver last summer. It looked like my dream mobile rig: very small size, detachable face plate, all HF bands, FSK, 6 meters with 100 watts ... AND 2 meters, all in one rig? It sounds too good to be true, but after using this radio in my car for about a month, I can tell you that this radio is real. Although the rig is not without its faults, Icom has produced an innovative masterpiece. The rig does just about everything as advertised. It is an easy-to-use radio that replaces several other radios that I was operating in my car. Over the Christmas holidays, I took a couple of long car trips here in Texas. The 706 was installed under a car seat, leaving plenty of room for luggage and packages. (Do NOT block the top of the rig. Leave room for air circulation. The rig gets VERY hot when transmitting!) The face plate was installed just below the dash within easy sight when driving. I used headphones, so my wife and daughter could listen to CDs while I was working DX. The headphone plugged into the face plate. I used a 7-foot whip mounted on the trunk of the car tuned for the SSB portion of 6 meters, my favorite band. The radio was a pleasure to use, even while driving. During a nice opening on 6 meters on the evening of December 27, I worked several new grid squares in the midwest and Arizona. I also worked North Dakota for the first time. I was able to work a station in Mexico City quite easily, despite the pileup. That 100 watts sure helps. (I previously used a 10-watt rig.) The sensitivity of the receiver, although not quite what the "pros" would want, was quite adequate. Noise from the car engine was only a minor problem; the noise blanker was effective for SSB. During the trip I also listened to a football game on TV channel 2, listened to truckers' traffic reports on CB channel 19 (27.185 MHz), worked a couple of 10m stations during the sporadic E opening on December 27, worked a couple of 20m stations, listened to WWV on 2.5, 5, and 10 MHz, eavesdropped on some interesting baby monitors and cordless phones on 49 MHz, listened to NOAA weather forecasts on 162.55 MHz, monitored some aircraft traffic, and did some ragchewing on 2-meter repeaters. Not bad for ONE radio! PRICE I paid $1249 for mine at Tucker Electronics in Dallas. They told me that they have sold about 200 of them in six weeks, making the IC- 706 their best selling rig of all time. They are getting them from Icom in lots of 20 and are having trouble keeping them in stock. Prices for accessories are pretty high. There is little profit margin in the box, so they make up for it with high accessory prices. The cable to allow for front-panel detachment is $48. UNIQUE FEATURES AND INNOVATIONS See http://www.icomamerica.com/icom/amateur/hf/#IC-706 for a list of features. * The smallest HF rig on the market (similar in size to the Kenwood TS-50) * Detachable face plate with a jack for a speaker or headphone. The mic plugs into the face plate using a plug similar to a modular telephone plug. (A spare plug is included.) The cable to allow for this detachment costs extra. * Full HF/VHF transmit coverage from 1.6 to 54 MHz and 144-148 MHz (the rig transmits only on the ham bands out of the box, but an easy modification unlocks the transmitter, see below) * General coverage receive from 50 KHz to 163 MHz (requires modification, see below) Rig receives up to 200 MHz but with poor sensitivity above 162 MHz even with the modification. You will be able to receive: longwave, AM broadcast band, shortwave broadcast, all amateur bands in all modes from 160m to 2m, FM broadcast band (wide FM), aircraft (118-136 MHz AM), VHF from 30 MHz to about 162 MHz, US TV channels 2 through 6, NOAA weather at 162 MHZ. * 6 meters and 2 meters, all-mode * 100 watts on HF and 6 meters (10 watts on 2 meters) * Innovative, easy-to-operate menu system. It becomes quite easy and natural to use after reading the well-written manual for about an hour. (In contrast to my Yaesu FT-470 HT, which I still cannot figure out.) * The manual is very well written, with lots of easy-to-understand diagrams. * Simple, but useful and configurable band scope. (Previously available only on very expensive rigs like the Icom 781.) This allows you to examine nearby frequencies for activity. * Split frequency operation appears complicated at first, but the rig's "quick split" mode makes it fast and easy. * Built-in electronic keyer at no extra charge. The Up/Down buttons on the mic can be used as a paddle. This has rejuvenated by interest in CW. I worked a couple of slow CW stations on the novice portion of 80m, which made me remember how fun CW is. * FSK (Nice feature for this price range) * DTMF and programmable offset for repeaters and split frequency work * Good audio reports from contacted stations. A station on 3.85 MHz reported "a very good signal for a mobile". A 2m FM station reported "very good audio ... so that's the 706 I've been hearing about." * Works very well with the AH-3 antenna tuner. This is the Icom HF (1.8-30 MHz) random wire tuner that worked with the 725. The tuner is mounted under the trunk lid of my car with cable ties. It can also be mounted outdoors. It will tune any 8-foot whip or wire for any HF band. (You need 40 feet for it to tune to 160m.) You can press a button to enable the tuner, or the tuner can fire off automatically if your SWR is too high. With my 7-foot 6-meter whip, I can tune to any HF band above 3.5 MHz. That means I need only one simple antenna for HF and 6m. * 100 memories that store frequency, split offset, mode, and FM tone. * Two antenna connectors: one for HF/6m and one for 2m. The connectors are switched at 60 MHz. * Jacks for remote speaker and/or headphones on both the face plate and the back of the rig. * Multifunction meter: S meter, SWR, relative power output, ALC. DRAWBACKS/FLAWS * Extended VHF receive requires modification (see below). * Poor sensitivity above 162 MHz. * Noise blanker does not work on AM. Very irritating pulse noise on AM while the car's engine is on. The blanker works well on other modes (except FM, where it is not needed). Not good for listening to AM while driving. A rather serious flaw in my opinion, since my $40 CB has a noise blanker that works well. * Poor QSK (full break-in) capability. Not recommended for high- speed CW operators who want QSK. Use semi-break-in instead. * No CW narrow filter. You can install one as an extra-cost option or use an external CW filter or DSP unit. * The built-in speaker provides surprisingly good audio for its size, but you will probably want to use an external speaker. The speaker can be connected to the face plate or to the rig itself. * Automatic repeater offset is not programmed into the rig. You need to program -600 or +600 yourself through the menu system. This is not a problem if you store your favorite repeaters into one of the 100 memories. * The S-meter is inaccurate below S9. Above S9, it is quite accurate. * High prices for accessories (typical of just about all other vendors) * The AH-3 antenna tuner is shipped with an unshielded cable, which picks up a lot of auto engine noise. You need to make your own shielded 4-wire cable. The AH-3 also blocks signals above 54 MHz. It also only works for HF, not for 6m or 2m. * Expect performance and receiver sensitivity similar to other rigs in this price range. This is a low-end rig in terms of price. For price vs. performance, this is probably the best amateur radio of all time. However, it will not outperform your $4000 rig. You probably won't win contests with it. You will have a lot of fun and own a nearly ideal rig for mobile work. HINTS AND TIPS 1) Take time to read the manual. The menu system will be bewildering unless you read the manual. One you get used to it, you will find the rig to be amazingly easy and fun to use. 2) You need to set the mode to wide FM to receive FM or TV broadcasts. Tune to the station, press the MODE key until the front display shows FM, then press and hold the MODE key for 2 seconds. WFM will appear in the display, and you will hear the station with nice audio. 3) Don't use the noise blanker on AM. It will not be effective and may distort your audio. 4) Don't use the QSK feature. 5) The rig gets very hot while transmitting. Keep the top of the radio clear to allow air circulation. MODIFICATIONS WARNING: Improperly performed modifications can severely damage your radio. I have performed these modifications successfully, but I offer no guarantee or warranty for them. Proceed at your own risk. TOOLS NEEDED: 1) Small philips-head screwdriver 2) Tweezers 3) Magnifying glass 4) Low-wattage (15 watt) soldering iron 5) Long-nosed pliers MODIFICATION 1: Enables out-of-band transmit for 1.6 MHz to 54 MHz. This does not enable extended VHF transmit; a modification for this may be available soon. This does not enable AM or FM broadcast band transmit. Your memories will be cleared after this modification, since you need to reset the CPU. 1) Open the top of the radio by removing the 3 top screws and 2 side screws. Look at the radio from the with the front panel facing you. screws. 2) Gently pull up the speaker and set is aside without damaging the speaker or the wires that attach it to the rig. 3) Note the silver rectangular box near the middle of the PCB marked something like "9 MHz SSB Filter". 4) Move your eyes up from this filter toward the back of the radio. Just before you get to the "D 108" marking, you will see two tiny diodes, two blank spaces, and one additional diode. They look something like this: D108 [XX] [XX] [ ] [ ] [XX] Remove this diode ^^^^ 5) The second diode from the left needs to be removed. I did this by crushing it with long-nosed pliers. You can also heat it with a low-wattage soldering iron and pull it up with tweezers. Be sure not to damage the other diodes or the PCB. Be sure that you don't apply too much heat, since the heat can damage the PCB and the other diodes. 6) Re-assemble the radio. Reset the CPU by pressing and holding down the UP and DOWN buttons on the front panel and pressing POWER. MODIFICATION 2: Enables more sensitive transmit above the 2 meter band. (148 to about 162 MHz; after that, sensitivity drops off.) Keeps sensitivity for the FM broadcast band. 1) Open the top of the radio by removing the 3 top screws and 2 side screws. Look at the radio from the with the front panel facing you. 2) Note the silver rectangular box near the middle of the PCB marked something like "9 MHz SSB Filter". 3) Move your eyes up from this filter toward the back of the radio. Follow the ribbon cable up. Notice a wide white connector with several colored wires in it on the back of the PCB. 4) The fourth wire from the left is a yellow wire. Cut this wire. Rather than cutting it, you can remove the connector, stick a paper clip in the side of the connector under the wire, push it in, and pull the wire out. Be careful not to remove the other yellow wire. 5) Re-insert the connector back to its original place on the PCB. 6) Open the bottom of the radio. You will again need to remove 5 screws. 7) Look at the radio with the front panel facing you. Note 5 tiny transistors behind the MENU button. Follow the trace from the middle transistor to a hole just to the left of jack J8. +------------------------+ | | * [XX] [XX] [XX] [XX] [XX] +-O *** J8 * Solder wire into this hole ^ 8) Solder a small wire into this hole. Be careful not to apply too much heat; use a low-wattage soldering iron. Be careful not to damage the PCB or the grey cable coming out of J8. Use a magnifying glass. 9) Run the other end of the wire you just soldered to the front of the radio and attach it to the yellow wire you just cut. 10) Re-assemble the radio. - END OF DOCUMENT - Subj: IC706 Review by RSGB from internet From: SM7VHS@SK7QJ.G.SWE.EU IC 706 Review by RSGB. Copied from internet by SM7VHS /Martin @ SK7QJ ---------------------------------------------------------------------------- Reproduced here by kind permission of the Radio Society of Great Britain FACILITIES CONTROLS RECEIVER TRANSMITTER HANDBOOK EXTRAS CONCLUSION AVAILABILITY SPECIFICATIONS TAKE A LOOK around your shack. You've probably got most of the following: an HF transceiver, a 6m transceiver, a 2m multi-mode, a general coverage receiver, a VHF scanner, an electronic keyer, a speech compressor and an AM/FM broadcast radio. What if you could replace the whole lot with one box retailing at under £1200? And what if the box were so small you could fit it all in the car or in your holiday hand-luggage? A pipe dream? Not at all with the latest from Icom. FACILITIES The IC-706 MEASURES just 167W x 58H x 200D mm and weighs in at 2.5kg. In this package, you get 100W on all HF bands, 100W on 50MHz and 10W on 144MHz, together with a receiver covering long wave to 200MHz, and whole lot more. The front panel detaches for remote operation using the optional separation cable. Included with the radio is a sturdy double fused 12V power lead, a hand microphone, spare fuses, and plugs for connecting a TNC, RTTY equipment, Morse key etc. There are over 100 memories. 99 can contain independent transmit and receive frequencies, mode, CTCSS frequency or 1750 Hz burst, and an eleven character name (e.g. 'Repeater R0' or 'Club net'). Two more contain scanning limits and another - the Call Channel - which is available on 144M Hz only. The dial is not automatically locked during memory mode so once a memory is selected it performs in a similar (but not identical) way to VFO mode - this can lead to confusion. Two VFOs are provided and memory contents can easily be transferred to either VFO - handy for rapidly switching between, say, 1.831 MHz CW, 14.333 MHz USB and 144.750 NBFM with repeater offset and CTCSS. Tuning steps are variable between 1 Hz (200 Hz per knob revolution) and 1 MHz. Up to ten Memo Pads are provided for the temporary storage of frequencies and modes (for instance of contest multiplier stations you are waiting for). These can be recalled at any time. The acid test for many DX operators is "how easy is it to work split?". The answer is: "very easy". The 'quick split' option - pressing a function key for about a second - equalizes the VFOs (or selects a programmable offset) and activates split operation. The transmit frequency can be monitored by a single button push. The word SPLIT appears prominently on the display to remind the operator to re-set after use. For repeater operation it is possible to use the main tuning dial, having programmed in a -600 kHz offset (using the quick split function described above) and a 1750 Hz toneburst. However it is much more convenient to use the memories because individual CTCSS tones can be set and the quick split function can be retained for HF use. CONTROLS THE FRONT PANEL is crowded but, with the exception of the RIT button, is very accessible. The tuning knob, which occupies almost the whole height of the panel, includes a finger-hole and is a pleasure to use, even at the slowest setting. Rotary controls are fitted for AF Gain and either Squelch or RF Gain, RIT shift and IF Shift. A miniature jack socket is provided for headphones. All of the other controls are push buttons, I the majority of which operate in conjunction with menus on the display. These handle facilities such as pre-amp/attenuator, memories, noise blanker etc. Mode changing is simply a matter of pressing the Mode button the appropriate number of times. Band changing is achieved by pressing the TS button to select the band option, I and then using the tuning knob. The display is backlit bright yellow which makes the black LCD letters very easy to read. Many of the displayed items are user selectable or only appear when the appropriate menu is accessed so the resultant display. is not over-crowded. Visible all the time are the mode in use, 'Split' when accessed, a clear readout of the entire frequency (to 1 Hz if selected), options such as 'NB' for noise blanker, the VFO in use, the memory in use, a bargraph and the current menu. The rear panel is very crowded. It contains a large heat-sink, two 'UHF' (S0-239) antenna sockets - one for below 60 MHz and the other for above, a ground terminal, an accessory socket, jacks for external speaker, RTTY, remote control and key/paddle, a microphone socket (this is in parallel with one just below the front panel),12V DC input and a socket for the optional automatic antenna tuner. Usefully accessible through holes in the side panel are adjustments for speech compressor level, beep/sidetone level, VOX and Anti-VOX. Return to Top RECEIVER THE RECEIVER is specified from 300 kHz but the review model tuned down to 30 kHz. It provides continuous coverage to 200MHz (automatically switching aerials at 60 MHz) with relatively few 'birdies', none of which interfered with amateur bands reception . Note that this means yet another amateur band 4m - is available, but only on receive. Modes covered are USB/LSB, CW, CW reverse, RTTY (FSK), AM, NBFM and wide (broadcast) FM. Filter bandwidths are shown in the Specifications box opposite. Fitted as standard are additional narrow filters for AM and NBFM, the latter being useful for future 12.5 kHz channel spacing or for operating on 29 MHz. Disappointingly, a narrow CW filter is available only as an optional extra at £65 (500Hz) or £69 (250Hz). Three pre-set levels of sensitivity are available from the front panel: normal, pre-amp and 20dB attenuator. These proved adequate for most purposes. However, if finer control is needed the Squelch knob can be set to act as an RF Gain control when used on CW, RTTY and SSB, whilst retaining its Squelch function on AM and NBFM. A tuneable IF offset is provided to help reduce adjacent QRM. It comes with a novel miniature graphical display showing how the wanted signal relates to the filter edges. The noise blanker proved effective on static and man-made noise in CW and SSB modes, but it completely ruined AM reception by badly distorting the wanted signal. Tiny fingers are required to activate the R IT ON button. If care is taken not to 'nudge' the RIT Shift control, the RIT could be left on permanently. The button lights up to warn that RIT is on. A shift of up to 1 kHz in either direction is permitted. Slow or fast AGC time constants can be selected, but there is no facility to link AGC speed to the mode switch, so if fast AGC is selected for CW, slow AGC must be separately selected for SSB use. The S-meter is an LED bargraph and, although no substitute for a real meter, it is well designed with fast attack, slow decay and an optional 'peak hold' facility. Scanning is available either between programmed limits, on all memory channels or on selected memories. There are several methods of resuming the scan after a signal is detected. In the short time the IC-706 was available for test, it was not possible to check one of the more esoteric facilities, the Simple Band Scope. This uses the dot matrix display to show graphically the activity over a band of frequencies The IC-706 was air-tested during the SAC CW Contest which provided a high level of activity. No problems were noticed once the RF gain was set to a sensible level. The receiver performed well on the medium wave with no cross-modulation, despite the high powered Brookmans Park BBC transmitter being only six miles away. One flaw emerged when tuning on the quiet 10m and 4m bands: The synthesiser was quite noisy, giving the impression of a busy band, until the knob was halted whereupon the 'signals' disappeared. The noise seemed to have been picked up on the long-wire antenna in use and would probably not have been prevalent on a remote coax-fed aerial. An interesting facility is wide FM which allows the IC-706 to be used as a sensitive VHF broadcast receiver, albeit without stereo or squelch. This, together with the long and medium wave coverage, would allow the IC706 to be used in a car in place of the broadcast set. The loudspeaker was disappointing. It faces upwards, producing a good, clear, sound, but had a tendency to buzz on CW signals. Its frequency response was ideal for communications purposes but very poor for broadcast signals, even on AM. An external speaker sounded fine, though, and the volume could be turned up quite loud without noticeable distortion . Return to Top TRANSMITTER MODES AVAILABLE on transmit are: CW, USB/LSB, RTTY, AM and NBFM. Output is reduced to 40% on AM. The provision of 100W on 50MHz puts the IC-706 ahead of several of its rivals. The supplied microphone felt good and has only the most basic controls - UP/DOWN buttons, a LOCK slide switch, and a lightly sprung transmit switch. The buttons can control frequency or memory channels. Power output is continuously variable from a nominal 5W to 100W (1 to 10W on 2m). Transmit is inhibited outside amateur bands and Martin Lynch tells us that initial attempts to provide transmit on 4m have proved unsuccessful (looks like time for a bit of homebrewing!) The fan, which runs continuously even on receive - speeds up noticeably on transmit. The front panel bargraph can be switched to display relative power out, SWR or ALC. This latter is important when setting up the built-in speech compressor. VOX is available and adjustments can be made without opening up the box. Icom have for some time incorporated an electronic keyer into their budget rigs, and the IC-706 is no exception. This means that yet another separate box has been done away with and greatly enhances the radio's value to the CW operator who enjoys portable working. Anyone who has forgotten their key on an expedition and has made QSOs by tapping wires together will appreciate the novel facility of being able to use the microphone's UP/ DOWN keys as a Morse paddle - amazingly easy to use! In addition to taking a standard paddle (normal or reverse), the keyer can be configured to take a straight key or mechanical bug for those who prefer more personalised Morse. Full or semi break-in is provided, together with 'no break-in' i.e. an external switch. Delay times are fully adjustable. Full break-in worked OK but the clattering of a relay on each dot proved very distracting. CW sidetone is adjustable from 300 to 900 Hz. Return to Top HANDBOOK THE 60-PAGE manual is helpful and is written in reasonably good English. It describes all of the controls with helpful flow diagrams for the numerous Menu driven functions. It does, however, assume a knowledge of amateur radio terms and practice, unlike some other handbooks. Diagrams are used extensively and no problems were experienced in understanding the radio 's facilities. Usefully, Split and Repeater operation have a page each. No circuit or block diagrams are included. EXTRAS OPTIONAL EXTRAS include a voice synthesiser(switchable English or Japanese), a high stability crystal unit, filters (250Hz, 500Hz, 2.8kHz or 1.9 kHz), an automatic ATU, mobile mounting bracket, loudspeakers and many more. Note that, although the additional filters can be installed by the user (i.e. they are plug-in), only one at a time may be installed . Return to Top CONCLUSION THE IC-706 is straightforward to drive and has a very usable front panel considering its size. On the air reports were all positive. And what fun to be able to listen to broadcast FM whilst automatically checking the local 2m net frequency every second or so! Two things disappointed - the lack of a narrow CW filter and the synthesiser noise on 28 and 70 MHz. Having said that, this is a rig which can replace virtually all of your shack in one go at a price which is almost covered by the sale of your existing gear! There's plenty to interest the keen Class B licensee, too, with 100W on 6m and a VHF general coverage receiver to check the progress of sporadic E. What is more, this really is a complete multiband station for taking mobile or on holiday. The IC-706 is set to become the ubiquitous rig of 1996. Now where's my cheque book . . . AVAILABILITY The IC-706 is available from a number of RadCom advertisers (though currently demand appears to be exceeding supply). The review model was very kindly loaned by Martin Lynch - Amateur Radio Exchange Centre (see advertisement on page 62) and we are most grateful to him and to the customer of his who was prepared to forego the pleasure of playing with his new toy for 48 hours whilst we checked it out. The price from Martin Lynch is £1195 and you can try one out for yourself at 'Lynchy's Open Day' on 18 November. Return to Top SPECIFICATIONS Source: IC-706 Handbook General Receive frequency coverage 300 kHz - 200MHz (but see text). Specifications guaranteed only on amateur bands listed below. Transmit frequency coverage (UK version) 1.800 - 1.99999 MHz; 3.500 - 3.9999 Mhz; 7.000 - 7.300 MHz; 10.100 - 10.150 MHz; 14.000 - 14.350 MHz; 18.068 - 18.168 Mhz; 21.000 - 21.450 Mhz; 28.000 - 29.700 Mhz ; 50.000 - 54.000M Hz; 144.000 - 146.000 MHz. Modes SSB, CW, AM, FM, WFM (receive only), RTTY. Memory channels 102 (split memory 99; scan edge 2; call channel 1). Antenna impedance 50 ohms nominal. Usable temperature range -10°C to +60°C (+14°F to +140°F). Frequency stability Less than +7 ppm from 1 min. to 60 min. after power on. After that, rate of stability change is less than s1 ppm/hr at +25'C (+77°F). Temperature fluctuations 0°C to +50°C (+32°F to +122°F) less than +5 ppm. Power supply requirement 13.8V DC s15%. Current drain at 13.8V Transmit 20A; Receive squelched 1.5A; Receive max. audio 1.7A. Dimensions Millimeters: 167(W) x 58(H) x 200(D). Inches 6.56(W) x 2.28(H) x 7.88(D). Projections not included. Weight 2.5kg (5.51b). Transmitter Output power HF & 50MHz: 5 - 100W (AM 2 - 40W); 144MHz 1 - 10W (AM 1 - 4W). Spurious emissions H F - better than -50 dB; 50 and 144MHz - better than -60d B. Carrier suppression Better than 40 dB. Unwanted sideband suppression Better than 50d B. Microphone impedance 600 ohms. Receiver SSB, CW, AM, RTTY, FM Double conversion superheterodyne WFM Triple conversion superheterodyne I intermediate frequencies (approx.) SSB, AM, CW, RTTY: 69M Hz and 9MHz . FM: 69 MHz, 9 MHz and 455kHz. WFM: 70.7 and 10.7 MHz. Sensitivity with pre-amp on SSB, CW (for 10 dB S/N) 1.8 - 29.9950 MHz', 50 - 54 MHz, (*not guaranteed outside amateur bands) 144- 148 MHz: less than 0.16 uV. AM (for 10 dB S/N/N) 0.5- 1.8 MHz less than 13.0 uV; 1.8 - 29.9950 MHz*, 50 - 54 MHz, 144 - 148 MHz less than 2.0 uV. FM (for 12 dB SINAD) 28.0 - 29.7 MHz less than 0.5 uV; 50 - 54 MHz, 144 - 148 MHz less than 0.3 uV. WFM (for 12 dB SINAD) less than 10.0 uV. Squelch sensitivity threshold(pre-amp on) SSB less than 5.6 uV, FM less than 0.3 uV. Selectivity SSB/CW >2.3 kHz (-6 dB), <4.0 kHz (-60 dB); AM >6.0 kHz (- 6 dB), <20.0 kHz (-40 dB); FM >12.0 kHz (-6 dB), <30.0 kHz (- ); FM narrow >8.0 kHz (-6 dB). Spurious and image rejection ratio More than 70 dB (HF bands only). Audio output power More than 2.0W at 10% distortion with an 8D load. RIT variable range +1.O kHz ma