Alinco DJ-G7, size: 2.3 MB
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Alinco DJ G7 extended transmit / MARS mod
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Alinco DJ-G7T Triband Handheld Transceiver
Reviewed by Bob Allison, WB1GCM ARRL Test Engineer
There are plenty of dual band handheld transceivers on the market, but this transceiver includes 23 cm (1240 MHz) band operation at 1 W, along with the more familiar 2 meter and 70 cm bands at 5 W output. This 23 cm band capability was enough to make me curious and sign up to perform the review. I had never worked this part of the spectrum before, but a quick look at the ARRL Repeater Directory suggests heavy usage of the 23 cm band in some areas. I had never worked FM satellites before either. Any handheld radio with 2 meter and 70 cm capability can work the FM satellites, but I was curious about the DJ-G7Ts full duplex capability. Once again I was reminded of the vast scope of ham radio in which there is always room for a new adventure. The inch green, backlit LCD is easy to read and has several display options. Display icons are intuitive and large enough to see. The keypad is straightforward once you learn the functions. The MAIN button toggles among the three ham bands, while the SUB button toggles through several bands from 530 kHz through 1300 MHz. The DJ-G7T sports a 614 inch flexible antenna with an SMA connector. Next to the antenna is a jack for an optional speaker/mic with a heavy duty screw down cover and gasket to keep out the elements when not in use. Most prominent are two sets of concentric knobs (one set for each of the two receivers). The inner knobs are used mainly for tuning the main and sub receivers, while the outer knobs act as VOLUME controls. The default setting has the main receiver on the left and the sub receiver on the right, but this arrangement can be reversed via a menu setting. Along the left side of the case are the POWER switch, a MONITOR button (momentarily opens the squelch) and the PTT switch. The right side of the case features a jack for external 4.5 to 16 V dc input. The DJ-G7T comes with a wrist strap and belt hook. The belt hook is a cloth loop that separates with
Key Measurements Summary
Receiver Sensitivity (12dB SINAD, V)
I3 Rx 60 62
73 57* 90
Receiver 3rd-Order Dynamic Range (10 MHz, dB)
I3 Rx 40
48** 51 ChRej 51* 53* 70
Receiver 3rd-Order Dynamic Range (20 kHz, dB)
90 103* 104*107* 110 105* 95* 100* 110
Adjacent Channel Rejection (dB)
Out of the Box
When I opened the box, I was pleased to see a drop-in battery charger included, rather than the usual wall charger. After about three hours, the DJ-G7Ts 1200 mAh lithium ion (Li-ion) battery was fully charged and ready for testing. As with any other complicated modern transceiver, thoroughly reading the manual will save a lot of time. Without reading the manual, it took several minutes for me to simply find the POWER switch, an inconspicuous button mounted flush to the left side of the case. The polycarbonate body felt comfortable in my hand. The overall size and weight would not be a burden even with extended use. The chassis is die-cast metal but not the case, so take some care in handling. Although it wouldnt survive the steam-roller test, the DJG7T will survive a splash in a pond, or a severe weather event. Its rated to withstand submersion in 3 feet of water for 30 minutes. The POWER button must be held down for one second. My large fingers had difficulty keeping enough pressure on the flush mounted button for the required time. Alinco indicates that the high button pressure is intentional to prevent accidental turn-on. The rest of the 19 buttons were manageable.
IF Rejection (dB)
Image Rejection (dB)
Audio Output (mW)
Tx-Rx Turnaround Time (ms)
** Off Scale * Measurement noise limited
at value shown.
The DJ-G7T handheld adds 23 cm operation to the usual 2 meter and 70 cm bands. With a wide range receiver and full duplex capability, it offers a lot of value for the money.
Mark J. Wilson, K1RO
Product Review Editor
From April 2010 QST ARRL
a plastic snap-together fastener, making it harder to remove in a hurry. It fits a belt up to 3 inches wide, handy for those 1970s parties. The battery pack on the back has two inch square metal pads for connecting to the drop-in charger. Be careful not to put the radio in your pocket along with spare change or keys.
Table 1 Alinco DJ-G7, serial number M000905
Frequency coverage: Receive,0.530-1299.995 MHz, Cellular blocked; transmit, 144-147.995, 430-449.995, 1240-1299.995 MHz FM, NFM.
Measured in ARRL Lab
Receive: Main band, 136-169.995, 400469.995, 1240-1299.995 MHz FM, NFM. Sub band, 0.530-59.745 MHz FM, NFM, AM; 59.750-107.995 MHz WFM; 108475.495 MHz FM, NFM, AM; 475.5805.995 MHz WFM; 806-823.995 MHz, 850-868.995, 895-959.995 MHz FM, NFM, AM; 960-1239.995 MHz WFM; 1240-1299.995 MHz FM, NFM, AM. Transmit, as specied. Receive (max volume, no signal, lights on) dual receive, 248 mA; battery save, as specied. Transmit (high, med, low 2, low 1): 146 MHz: 1.44, 0.95, 0.73, 0.55 A; 440 MHz: 1.55, 1.03, 0.84, 0.55 A; 1294 MHz: 0.75 A (high), 0.6 A (low). Receiver Dynamic Testing Main band, for 12 dB SINAD: 146 MHz, 0.17 V; 440 MHz, 0.17 V; 1294 MHz, 0.19 V. Sub band: 29 MHz, 0.16 V; 50 MHz, 0.16 V; 146 MHz, 0.17 V; 222 MHz, 0.6 V; 440 MHz, 0.17 V; 902 MHz, 0.62 V; 1294 MHz 0.29 V. 100 MHz, 0.58 V; 500 MHz, 0.52 V; 1000 MHz, 0.71 V. 10 dB S+N/N, 1-kHz tone, 30% modulation: Sub band, 1 MHz, 0.53 V; 3.8 MHz, 0.47 V; 14 MHz, 0.4 V; 50.4 MHz, 1.3 V; 120 MHz, 0.68 V; 145 MHz, 0.36 V; 222 MHz, 1.0 V; 440 MHz, 0.39 V; 902 MHz, 1.0 V; 1250 MHz, 0.44 V. 20 kHz offset*, Main band: 146 MHz, 57 dB; 440 MHz, 53 dB; 1294 MHz, 51 dB. Sub band: 29 MHz, 59 dB; 52 MHz, 63 dB; 146 MHz, 57 dB; 222 MHz, 56 dB; 440 MHz, 53 dB; 902 and 1294 MHz, 51 dB. 10 MHz offset: Main band: 146 MHz, 69 dB; 440 MHz, 73 dB; 1294 MHz, 62 dB. Sub band: 29 and 52 MHz, 56 dB; 146 MHz, 65 dB; 222 MHz, 71 dB; 440 MHz, 64 dB; 902 MHz, 67 dB; 1294 MHz, 83 dB. Main band: 146 MHz, 84 dB; 440 MHz, 88 dB; 1294 MHz, 90 dB. Sub band: 29 MHz, 55 dB; 52 MHz, 74 dB; 146 MHz, 82 dB; 222 MHz, 48 dB; 440 MHz, 88 dB; 902 MHz, 94 dB; 1294 MHz, 80 dB.
Overall, the radio tested fairly well on the three amateur bands it was designed for. With a wideband receiver in a small package, some design compromises must be made in particular placement of the IF (intermediate frequency). Many models have the IF above or below the 6 meter band, resulting in poor IF and image rejection in that area. This is also true with the DJ-G7T, where the IF of the sub receiver is within the 6 meter band, so expect images while listening to 6 or 10 meters. You can listen to the main and sub receivers simultaneously, and even tune them to the same band. I observed up to 6 dB of signal degradation in the sub receiver with both receivers tuned to 2 meters in the dual listening mode. Interestingly, with the main receiver tuned to 2 meters, I noticed about 8 dB of signal degradation with the sub receiver tuned anywhere between 50 and 135.995 MHz. Alinco attributes this to filter characteristics. I didnt observe signal degradation with other main and sub frequency combinations. The earphone jack has speaker level output, not the lower level normally used for earphones, so you need to be careful about cranking up the volume. The audio was nice and clean even at high listening levels. I observed the specified transmitter power output with the transceiver running from an external 13.8 V dc supply, but was a bit less than specified on 2 meters with the battery pack. A nice surprise is this transceiver can operate with as little as 4.5 V dc and still put out a usable signal, a plus during emergencies.
Power requirements: 4.5-16 V dc; receive, 200 mA; battery save (1:4) average, 56 mA dual receive, 50 mA single receive; transmit, 1.6 A @ 144 MHz, 1.8 A @ 430 MHz, 0.8 A @ 1240 MHz (high power).
Receiver FM sensitivity: 12 dB SINAD, main band, 144/430 MHz ham bands, 15 dBV; 1200 MHz ham band, 13 dbV; Sub band, 30-470 MHz, 15 dBV; >470 MHz, 7 dBV. WFM sensitivity: 76-470 MHz, 6 dBV; >470 MHz, 3 dBV. AM sensitivity: 10 dB S/N, <50 MHz, 1 dBV; >50 MHz, 6 dBV.
Two-tone, third-order IMD dynamic range: Not specied.
Two-tone, second-order IMD dynamic range: Not specied.
On the Air
As previously mentioned, review the manual to understand the use of the various settings and functions. I found the manual that came with our DJ-G7T difficult to understand and follow. Since then, Alinco has revised the manual, and the new version is available for download from their Web site and is shipping with current production units. With the new version (PS0597A, printed on the back cover of the manual), I had no trouble understanding the configuration steps, most of which start by pressing the FUNCTION button and rotating the concentric knobs at the top of the radio. The DJ-G7T has 1000 regular memory channels that can be organized into banks of 100 channels. One is called a dual bank, which stores both main and sub frequencies. The
radio offers a variety of scanning modes. With testing complete, W1AW Station Manager Joe Carcia, NJ1Q, set up to work me on 1294.5 MHz (national simplex calling frequency) at lunch time. Joe helped me adjust the DJ-G7Ts microphone gain, easily set by pressing FUNCTION and then MIC and then selecting one of four levels with a rotary knob. Joe gave me a good audio report and found that level 3 worked best for me, as I like to speak a foot away from handhelds. The receive audio from the 134 by 34 inch speaker grill sounded good as well.
My First FM Satellite QSO
With full duplex capability, this transceiver appears to be well suited for FM
repeater satellites such as AO-27 and AO-51. The dual bank memory is perfect for satellite work because several frequency pairs are necessary to compensate for the Doppler shift that occurs during a pass. On a late November afternoon, I checked the AMSAT Web site and found an AO-27 pass only minutes away. I hurriedly entered the frequency combinations necessary and soon heard a QSO taking place noisy, with lots of fading. Clearly, a better antenna was in order at my end. I got an Arrow dual band Yagi designed for portable use and was ready for another pass. With headphones on, I could clearly zero in on AO-27. After listening to a few passes to observe the routine, I aimed the
Adjacent-channel rejection: Not specied.
Main band, 20 kHz offset: 146 MHz, 57 dB; 440 MHz, 51 dB; 1294 MHz, 48 dB. Sub band: 29 MHz, 56 dB; 52 MHz, 65 dB; 146 MHz, 56 dB, 440 MHz, 51 dB, 902 MHz, 49 dB, 1294 MHz, 48 dB. IF rejection, Main band: 146 MHz, 103 dB, 440 MHz, 107 dB; 1294 MHz, 104 dB. Sub band, 29 MHz, 22 dB, 50 MHz, 26 dB, 146 MHz, 83 dB; 222 MHz, 87 dB; 440 MHz, 110 dB MHz; 902 MHz, 92 dB; 1294 MHz, 97 dB. Image rejection, Main band: 146 MHz, 105 dB*; 440 MHz, 100 dB*; 1294 MHz, 95 dB*: Sub band: 29 MHz, 67 dB; 50 MHz, 1 dB; 146 MHz, 105 dB*; 222 MHz, 27 dB, 440 MHz, 92 dB*; 902 MHz, 95 dB, 1294 MHz, 94 dB*. At threshold: 146 MHz, 0.11 V; 440 MHz, 0.13 V; 1294 MHz, 0.13 V. Maximum squelch: 0.45 V, typical. Maximum volume 490 mW at 8.8% THD; 1.5% THD at 1 VRMS.** Transmitter Dynamic Testing With 13.8 V dc: 146 MHz, 5 / 2 / 1 / 0.4 W; 440 MHz, 5.4 / 1.8 / 1.1 / 0.6 W; 1294 MHz, 1.2 / 0.6 W. With EPB-73 battery @ 8.4 V dc: 146 MHz, 4 / 1.9 / 1.0 / 0.4 W; 440 MHz, 3.8 / 1.8 / 1.1 / 0.6 W; 1294 MHz, 1.2 / 0.6 W. Power output at 4.5 V dc: 1.3 W maximum. 146 MHz, >70 dBc; 440 MHz, 66 dBc; 1294 MHz, 53 dBc (<25 W). Squelch on, S9 signal, 290 ms (typical). Squelch on: 146 MHz, 57 ms; 440 MHz, 47 ms; 1294 MHz, 138 ms.
Spurious response: VHF, 60 dB; UHF, 50 dB.
Squelch sensitivity: Not specied. Audio output: 400 mW at 10% THD into 8 !. Transmitter Power output with 13.8 V dc: 144/430 MHz (high/med/low 2/low 1), 5 / 2 / 1 / 0.3 W. 1294 MHz (high/low), 1 / 0.3 W. With EPB-73 battery: 144 MHz (high / med / low 2 / low 1), 5 / 2 / 0.8 / 0.3 W; 430 MHz, 4.5 / 2 / 0.8 / 0.3 W; 1240 MHz, 1 / 0.3 W. Spurious signal and harmonic suppression: 60 dB or better. Transmit-receive turnaround time (PTT release to 50% of full audio output): Not specied. Receive-transmit turnaround time (tx delay): Not specied.
Size (height, width, depth): 4.5 2.4 1.2 inches; weight, 10.6 ounces with exible antenna. Price: DJ-G7T, $330; EMS-62 speaker/mic, $55; ERW-7 PC interface USB cable, $55; EDS-10 plug adapter cable, $15.
battery pack (7.4 V, 1200 mAh Li-ion) and EDC-173T charging stand supplied. Available options: Replacement EBP-73, $70; EDH-35 battery case (4 AA cells; TX power limited), $25; EDC-36 cigarette lighter cable with lter, $35. *Measurement was noise limited. **Measurements made in single receiver mode. Total output power, full volume, dual receive is 600 mW at 20% THD.
antenna where I thought the bird might be and called a quick CQ. I received a prompt reply, but in the excitement I fumbled the other stations call sign and asked for a repeat. Memories of my first contact years ago flashed through my head. The other operator kindly repeated his call while I stumbled to find a pen oh no. no pen! I blew it! Unlike the operator, the radio clearly did its job. Using headphones and a suitable antenna, the DJ-G7T with its full duplex capability works well with FM satellites. Satellite operation gave me a chance to observe the full duplex function. While transmitting with high power at
145.850 MHz on the main band and receiving simultaneously around 435.795 MHz on the sub band, I heard only slight interference with the squelch open. Transmitting with the sub receiver squelch open is not a good operating technique, since the roar of an open squelch will be transmitted along with your voice. Headphones will prevent echoing and feedback during transmission. If you must use the speaker, the sub band audio can be set to mute during transmit.
Listening to the sub band receiver is entertaining. With the internal bar antenna, local AM broadcast stations are heard fairly
well. FM broadcast performance is adequate using the supplied antenna. An external antenna brings the DJ-G7T to life! Tuning across the shortwave bands, the receiver overloaded at times with my inverted-L antenna. Not to worry: there are four attenuator settings available. The DJ-G7T can be set up as a cross band repeater. This feature can be useful for temporary operation in an emergency situation, but you must avoid causing harmful interference to other stations. Carefully choose a frequency pair and review the FCC rules before operating in repeater mode. Other interesting features of the DJ-G7T are a band scope that indicates nearby activity, a bug detector that allows you to find hidden transmitters, and a transmitter detecting function. This last feature is intended for radio foxhunts. Speaker audio is disabled and instead the G7T sounds an occasional beep, with the beep sounding at shorter intervals as the hunter closes in. The adjustable attenuator is put to use at close range, and before you know it, youve caught the fox. Clearly, this is a fun radio to use. I did find some issues that I hope will be corrected by updated firmware. At the top of my list is the automatic repeater shift, which turns off for the five channels between 145.11 and 145.19 MHz. There are locally coordinated FM repeaters in this range and I had to disable the auto shift function and manually enter the minus offset for this part of the band. Furthermore, in sections of the band where auto shift functioned as expected, I was unable to change the repeater shift manually prohibiting me from going to simplex mode if needed. I also found that while programming memories, the repeater shift was not stored in memory from the VFO with the auto repeater shift on. I ended up leaving the auto shift function off most of the time and used the FUNCTION and MAIN buttons (continued pressing of MAIN toggles the repeater offset from + to to simplex). Cloning software is available via a free download from Alincos Web site, as are firmware updates. You will need the optional EDS-10 plug adapter cable and ERW-4C (serial) or ERW-7 (USB) cable for connection to your PC. The DJ-G7T is an affordable three band handheld that is well suited for talking across town, listening to a wide range of frequencies, or working the FM satellites. Operation on 23 cm is a big plus if you have an active repeater in your area. Manufacturer: Alinco Inc, Yodoyabashi Dai-Bldg 13F, 4-4-9 Koraibashi, Chuo-ku, Osaka 541-0043, Japan; www.alinco.com. US distributor: GRE America, 425 Harbor Blvd, Belmont, CA 94002; tel 650-5911400; e-mail alinco-sales@greamerica. com; www.allinco.com/usa.html.
GILES READ, G1MFG E-MAIL: GILES.READ@RSGB.ORG.UK
AUGUST 2009 RADCOM
Alinco DJ-G7 V/U/SHF triple bander
2m, 70cm and 23cm in a cute little package.
INTRODUCTION. Alinco have a reputation for producing solid, dependable but unexciting handhelds. The DJ-G7E shatters this mould and, for me, is one of the most exciting handhelds to come out in a long time. The reason? It's got 23cm and it's full duplex. WHAT'S IN THE BOX? The Alinco DJ-G7 comes with a normal-size triple band rubber duck with an SMA connector, 1200mAh Li-Ion battery, drop-in mains charger with wall-wart 12V adapter, an English manual and a wrist strap. Unlike many other radios there's no hard belt clip; rather, there is a webbing loop and clip arrangement that lets the radio dangle rather than sit firmly on your belt. I'm amply proportioned and appreciated this enormously: I tend to break belt clips but this one was really comfortable and secure. It also meant I could clip it securely to the handle of my laptop bag on my travels. action of the buttons is fairly good and they're just about big enough for my widetipped fingers. Rubber bump strips are provided on the bottom front corners, which is a nice touch; the rest of the case is of polycarbonate over a diecast aluminium chassis. There is a single 4-pin speaker/mic socket on the top of the radio, for which suitable speaker mics are available. There is also a 'breakout' lead mentioned in the manual, EDS-14, which splits the 4-pin 3.5mm socket out to 3.5mm and 2.5mm sockets for the speaker and mic respectively. A DC In socket on the right side completes the socketry. It's worth pointing out that most of this review was carried out on an early Japanese/ US market (T) version and that the actual EU version didn't reach me until the day before we printed this issue of RadCom. There were a few 'rough edges' on the early T version, which I'm pleased to say have been fixed on the EU model. However, I'd caution anyone against buying an early one through grey-market importing because the one I tried had some serious shortcomings including a total lack of support for repeaters, something that works fine on the European E version. IN USE. As with all new radios it took me a little while to get used to how this radio thinks. It's not that it's difficult, just that it's a bit more comprehensive than some others I've used. The bottom line is that it transmits normal or narrow FM on the whole of 2m and 70cm and on 23cm from 1240-1300MHz. Receive is nearly continuous from 530kHz to 1300MHz (there's a gap from 53.75 to 60.75MHz) so you get medium wave to microwaves in one handy package. It demodulates AM, FM and wide (broadcast) FM. Audio quality on transmit and receive was very good. There was no trace of the muffled quality on transmit that you sometimes get with water-resistant handhelds. Receive audio was clear and plentiful. I tried all three bands and audio quality was very similar on them all. Basic operation was a cinch. The twin tuning knobs make small frequency changes to either VFO really easy and natural; likewise the volume. Larger changes were easily entered via the keypad, which automatically selected the correct band (ie you didn't have
GENERAL DESCRIPTION. I liked this radio from the moment I picked it up. It just feels somehow 'right' in my hand, with all the controls where I want them to be. The weight is about right, too, as is the balance when the aerial is connected. The case is sculpted to fit nicely into the hand. The most obvious feature is the fact that the top panel has two sets of tuning and volume controls, implemented as two pairs of concentric knobs. This is great because it means you can tune either VFO or adjust its volume without having to press any extra buttons (or worse, trawl through a menu system). This alone makes the radio streets ahead of some in the usefulness stakes. Bi-colour (red/green) LEDs on the top panel indicate Tx or Squelch Open, according to colour. The display is a large, clear, full graphic design with very fine dots. I found it particularly easy to read because the characters were well formed. The contrast is pretty decent too (and menu-adjustable), as is the backlighting. You can even set the font to Bold. Seventeen clearly labelled keys are on the front panel, all of which have at least two functions. The second function is generally accessed by a quick press of the FUNCtion key first and, with the exception of the Wild key, everything appears straightforward. The left side of the radio contains the PTT, Monitor/Lamp and power on buttons. The
RADCOM AUGUST 2009
The supplied drop-in charger makes charging very easy.
It's ideal for satellite operations, as demonstrated by Carlos, G0AKI.
Looking from the side you can see the soft belt clip plus the PTT, MONI and power buttons.
to select 23cm before entering a frequency on that band). Switching between bands was easily achieved by simply pressing the MAIN or SUB button the top (Tx/Rx) VFO steps between 2m, 70cm and 23cm, while the bottom (SUB, RX only) VFO steps between AM broadcast, HF, FM broadcast, air band, 2m, two further VHF allocations, three 70cm allocations, two more UHF allocations and finally 23cm. Setting repeater mode isn't initially that obvious the button labelled RPT actually activates cross-band repeat mode when held for three seconds after pressing FUNC. After several trawls through the manual I found that setting repeater shift is just a matter of pressing FUNC then MAIN and selecting the appropriate shift (eg +600, -600 or 0 for 2m). You can very easily set a custom shift by rotating the frequency knob. CTCSS encode and decode, tone burst and even DCS are all supported. One nice thing about the radio is that it's possible to customise the user interface, to a certain degree. On the keypad the Wild key can be set to activate one of a number of functions (such as duplex on/off), as can the MONI (monitor) button on the side, normally used to open the squelch and light the display. Similarly, the function of the concentric dials can be adjusted, albeit to a lesser extent. I must admit that I found it a bit hard to get my head around the process of programming the memories. There are seven different types of memory general, program scan, dual frequency, priority, call channel, search pass and transmitter (bug) detector and you have to select which type you want to program. I suspect that this partly stems from Alinco's strong scanner background, and will probably be immediately familiar to a scanner user.
DUPLEX AND SATELLITE OPERATION. One of the unusual tricks the G7 has up its sleeve is full duplex operation: receive on one frequency while simultaneously transmitting on another this is quite a rare achievement in handhelds. This is particularly useful for satellite operations. If you listen to yourself coming down off the satellite you can be sure that you're pointing your aerial in exactly the right direction and actually getting into the bird. My colleague Carlos, G0AKI tried working via the several satellites using the G7 with an Arrow handheld aerial and his comment was that you really need to use a headset or at least an earpiece to stop
Most memories only act on a single VFO, but the dual frequency memory recalls both VFOs at the same time. This is particularly useful when operating satellites more on this later. However, there's nothing intrinsically difficult about the memory programming process, and it's the sort of thing that once you've mastered it by following the comprehensive manual, you'll be able to work with quite easily. With a total of well over 1000 memories to play with, you can easily set up one for every repeater in the country. As with most modern handhelds, it's probably easier to program the G7 via your computer. Alinco has a good history of offering free control software and they are following in the same tradition with the G7. At the time of writing, the English version of the software wasn't finished, but there is a placeholder for it on the Alinco website. The PC to radio connecting lead is quite expensive but it's fairly easy to make your own using details you can find on the internet. That said, within an hour of first picking up the G7 I was able to set it any way I wanted without having to stop and think about it.
CONCLUSION. The Alinco DJ-G7 is a lovely little bit of kit that will particularly appeal to anyone who wants to operate 23cm, full duplex or via satellites. It's a very versatile, rugged radio that feels, looks and sounds great. When I next look for a new handheld, the Alinco CJ-G7 will be high on my list. We would like to thank Nevada Radio (02392 313090, www.nevadaradio.co.uk) for lending us the review samples. The EU version of the DJ-G7 is available from stock for 359.95.
PERFORMANCE. The EU version of the DJ-G7 only came into my hands very late in the review process so I didn't do any measurements on the T version and anyway, it wouldn't be fair to present figures from an early, non-European-spec version. We did, however, check the output power of the US version and the Bird throughline meter we used indicated that it was producing rather more than the rated 5W output on 2m and 70cm. No power measurements were made on 23cm. I've always found that in normal day-to-day use the performance of a handheld is measured more in terms of the battery life and audio output power rather than its IP3 or ultimate sensitivity. It's fair to say that when I used this radio side by side with an old Icom IC-T81A it performed very well, which is what I'd expect for newer technology. During the review period (on the early T version) I didn't have any issues with blocking or images, although on one occasion when Carlos and I were attempting a satellite contact we heard a strong carrier on the downlink frequency that wasn't present on the Kenwood TH-D7G we were using as a reference. In fairness, we were in the middle of an industrial estate at the time and there were all kinds of stray interfering signals all over the place. I also heard several channels of S9+lots of pager-type data bursts around 51.75MHz but didn't manage to work out the source.
feedback when using it in full duplex mode. One thing he did like was the dual memory, which meant he could simultaneously correct for Doppler shift on the uplink and downlink frequencies much more easily than on the Kenwood TH-D7G he usually uses for portable sat-ops.
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