Icom IC-275H (IC 275 H IC275H) transceiver mods reviews software and diagrams

   
 
ham | what is new | links
 Welcome to Www.Hampedia.net  submit to reddit
19 March 2024, 8:08 UTC 


SDR


ELAD
SDRplay

Transceivers


Kenwood
Midland
Yaesu
Alinco
Icom
Other

Antennas


M2
Par
Gap
Sirio
Araki
Maco
Nil-Jon
Maldol
Comet
Hustler
Nagoya
Watson
Hy-Gain
Dressler
Cue Dee
Solarcon
Diamond
Cushcraft
Quicksilver
Moonraker

Power supplies


Powerbox
Kenwood
Diamond
Samlex
Mascot
Daiwa
Yaesu
Alinco
Icom
H&H

Rotators


M2
CDE
Yaesu
Create
Kenpro

Antenna tuners


MFJ
LDG
SGC
Icom
Yaesu
Mizuho
Dentron
Kenwood
Sommerkamp
Barker & Williamson

Repeaters


GME
Icom
Zodiac
Kenwood

Transverters


Microwave Modules
Tokyo Hy-Power
SSB Electronics
Tecnostudi
Kenwood
Yaesu
Minix

Meters


Diamond
Comet
Bird
MFJ

Ham resources


Propagation:
  Sporadic E skip (Es)
  Backscatter
  Tropo
  Meteor Scatter (MS)
  F2 Skip
  Aurora
  Trans-equatorial scatter (TE)
  Lightning scatter (LS)

Icom IC-275H (IC 275 H IC275H)
IC-275H
Programming interface schematics for Icom:
Programming software for Icom IC-275H (IC 275 H IC275H) :
PDF User Manual for Icom IC-275H (IC 275 H IC275H) : Icom IC-275H Instruction Manual
PDF Service Manual with schematics for Icom IC-275H (IC 275 H IC275H) :

Mods for Icom IC-275H (IC 275 H IC275H) :
    Icom IC-275H (IC 275 H IC275H) reduced power splattering
    Icom IC-275H (IC 275 H IC275H) Splitting into RX- and TX paths
    Icom IC-275H (IC 275 H IC275H) Frequency range & CTCSS tones
    Icom IC-275H (IC 275 H IC275H) Power control modification
    Icom IC-275H (IC 275 H IC275H) Restoration of pass band tuning
    Icom IC-275H (IC 275 H IC275H) Modification of cw pass band (BFO)
    Icom IC-275H (IC 275 H IC275H) Disabling of SBB squelch
    Icom IC-275H (IC 275 H IC275H) Very fast AGC
    Icom IC-275H (IC 275 H IC275H) SSB RF Gain
    Icom IC-275H (IC 275 H IC275H) Tuning speed
    Icom IC-275H (IC 275 H IC275H) PSK Transmit Audio Modification
    Icom IC-275H (IC 275 H IC275H) Freq. steps mod
    Icom IC-275H (IC 275 H IC275H) Band Expand
    Icom IC-275H (IC 275 H IC275H) amplifier oscillates
    Icom IC-275H (IC 275 H IC275H) Prevent PLL unlock at high ambient temperature
    Icom IC-275H (IC 275 H IC275H) Improve voice synthesizer and side tone audio
    Icom IC-275H (IC 275 H IC275H) Prevention of PLL unlock at 174 MHz
    Icom IC-275H (IC 275 H IC275H) Improve the stability of the center meter
    Icom IC-275H (IC 275 H IC275H) Noise coming from speaker during transmit with audio turned up
    Icom IC-275H (IC 275 H IC275H) Eliminate possible spurious emission when thermal switch has turned on during TX

Icom IC-275H (IC 275 H IC275H) technical specifications :  Icom IC-275H (IC 275 H IC275H) technical specifications



Icom IC-275H (IC 275 H IC275H) PSK Transmit Audio Modification

After reading a message from a friend regarding the modifications he made to his Yaesu FT736 to improve the PSK transmit audio, I decided to investigate the situation on my ICOM IC275H to see if the same problem existed. I was certainly less than satisfied with the results I was getting in the first few days with FO-20 Mode JD. I was feeding the TX audio in at the front microphone socket and results on the uplink were quite poor but my downlink copy was 100%.

The first change I made was to move the Tx audio to the rear connector, ACC1. Results improved but I was still not satisfied. Some scoping around the Varicap diode, D40, revealed considerable distortion of the PSK audio. To prove if this was the cause of my problem I studied the IC275 circuit to see how I could feed the TX audio in as close to the Varicap modulator diode, D40, as possible.

In the IC275H there are several Audio feeds to D40, including 3 via Q33, and in my unit one of these, the feed from the Tone Squelch is unused. P46 normally plugs into the Tone Sq card but as this option is not installed it is left unterminated inside the rug. I also found that Pin 1 on ACC1 was unused so a shielded wire from P46, pins TSTN and GND to ACC1, Pins 1 and 2 would give easy access from outside the rig to D40 and NOT alter any of the existing functions of the IC275H.

The installation of the wiring is not as easy as it sounds however:

(1) You have to find a way to connect P46. I stripped a small amount of insulation from the wires just behind the plug housing and soldered the extension wire there.

(2) To gain access to ACC1 you must remove the PLL PCB that it is mounted on. With the board removed I soldered the extension wire to the underside of the board taking care not to short out any surrounding tracks. The whole exercise took about 30 minutes.

You will probably need more audio level from you PSK modem. You can then use the pot, F151, in the IC275H to set the TX modulation level.

Results from making this change have been outstanding with many less retries on the uplink than previously. The waveform being applied to the Varicap diode is now identical to the output from the modem.
Performance via LUSAT and PACSAT digipeaters have been equally pleasing. EXTRA hint: Use DWAIT=0 RESPTIME=0 and start TXDELAY=100 ms and reduce to as low as possible for your radio - I use 30 ms.

A similar change could be performed on the ICOM IC271 by wiring to J12 on the Main Board. J12 is normally unused in Australian IC271's.

  1. What you need to do is work out a way to belt the varactor directly. Then inject a square wave (1200 hz will do) and measure the deviation that results.
  2. You can do this measurement with either a proper deviation instrument or more likely with a monitor RX, by looking at the output from it's discriminator.
  3. You can calibrate the monitor RX quite easily, Tune in a steady unmodulated carrier and note the discriminator DC output voltage Change the RX frequency by 1 Khz (knob on the RX front) and note the change in DC voltage. That gives you the monitor RX sensitivity in volts per Khz.
  4. Now return to the TX, and adjust that driving square wave to give you approx +/- 3 kHz, you want to see about 6x volts peak to peak square wave on the monitor. (Somewhere between 4x and 6x will do, no more.)
  5. Now return to the modem and juggle about with the TXAudio output components to achieve this level of drive signal, and look at the monitor RX too.
  6. When you have done this, which should take you all of 30 minutes, you should be in business. If you can't get square waves TX to produce squarish waves out of the monitor RX, then the varactor dept. must be suspect, and so on.
Since I am not going to be able to try the mods until I return from a vacation I won't be able to give you an answer as to whether they work or not. But it is my opinion they will. What is happening is that between the mic connector and the varactor the digital signal is being badly distorted and the bird does not respond to the digital signal. This would not make much difference on voice but on a digital signal it makes all the difference in the world.

ICOM has not tried this mod nor have we verified this problem.

More Icom Radioamateur Transceivers

Icom VHF/UHF Handhelds:
    Icom IC-Delta 1A (IC Delta 1A ICDelta1A) service manual and specs
    Icom IC-Delta 1E (IC Delta 1E ICDelta1E) service manual and specs
    Icom IC-E7 (IC E7 ICE7) service manual and specs
    Icom IC-E90 (IC E90 ICE90) service manual and specs
    Icom IC-P2E (IC P2 E ICP2E) service manual and specs
    Icom IC-P2ET (IC P2 ET ICP2ET) service manual and specs
    Icom IC-P4ET (IC P4 ET ICP4ET) service manual and specs
    Icom IC-P7A (IC P7 A ICP7A) service manual and specs
    Icom IC-Q7A (IC Q7 A ICQ7A) service manual and specs
    Icom IC-Q7E (IC Q7 E ICQ7E) service manual and specs
    Icom IC-R20 (IC R 20 ICR20) service manual and specs
    Icom IC-S7D (IC S7 D ICS7D) service manual and specs
    Icom IC-S21E (IC S21 E ICS21E) service manual and specs
    Icom IC-S22 (IC S22 ICS22) service manual and specs
    Icom IC-S32 (IC S32 ICS32) service manual and specs
    Icom IC-S41E (IC S41 E ICS41E) service manual and specs
    Icom IC-T2H (IC T2 H ICT2H) service manual and specs
    Icom IC-T3H (IC T3 H ICT3H) service manual and specs
    Icom IC-T7D (IC T7 D ICT7D) service manual and specs
    Icom IC-T7E (IC T7 E ICT7E) service manual and specs
    Icom IC-T7H (IC T7 H ICT7H) service manual and specs
    Icom IC-T8A (IC T8 A ICT8A) service manual and specs
    Icom IC-T8E (IC T8 E ICT8E) service manual and specs
    Icom IC-T22A (IC T22 A ICT22A) service manual and specs
    Icom IC-T22E (IC T22 E ICT22E) service manual and specs
    Icom IC-T32 (IC T 32 ICT32) service manual and specs
    Icom IC-T81E (IC T81 E ICT81E) service manual and specs
    Icom IC-T90 (IC T90 ICT90) service manual and specs
    Icom IC-U1 (IC U 1 ICU1) service manual and specs
    Icom IC-U82 (IC U 82 ICU82) service manual and specs
    Icom IC-V1 (IC V 1 ICV1) service manual and specs
    Icom IC-V8 (IC V 8 ICV8) service manual and specs
    Icom IC-V21AT (IC V21 AT ICV21AT) service manual and specs
    Icom IC-V82 (IC V 82 ICV82) service manual and specs
    Icom IC-W2A (IC W2 A ICW2A) service manual and specs
    Icom IC-W2E (IC W2 E ICW2E) service manual and specs
    Icom IC-W21AT (IC W21 AT ICW21AT) service manual and specs
    Icom IC-W21E (IC W21 E ICW21E) service manual and specs
    Icom IC-W21ET (IC W21 ET ICW21ET) service manual and specs
    Icom IC-W31A (IC W31 A ICW31A) service manual and specs
    Icom IC-W31E (IC W31 E ICW31E) service manual and specs
    Icom IC-W32A (IC W32 A ICW32A) service manual and specs
    Icom IC-W32E (IC W32 E ICW32E) service manual and specs
    Icom IC-X21T (IC X21 T ICX21T) service manual and specs
    Icom IC-X2E (IC X2 E ICX2E) service manual and specs
    Icom IC-Z1A (IC Z1 A ICZ1A) service manual and specs
    Icom IC-Z1E (IC Z1 E ICZ1E) service manual and specs
    Icom IC-02E (IC 02 E IC02E) service manual and specs
    Icom IC-03AT (IC 03 AT IC03AT) service manual and specs
    Icom IC-04AT (IC 04 AT IC04AT) service manual and specs
    Icom IC-04E (IC 04 E IC04E) service manual and specs
    Icom IC-2AT (IC 2 AT IC2AT) service manual and specs
    Icom IC-2E (IC 2 E IC2E) service manual and specs
    Icom IC-2GAT (IC 2 GAT IC2GAT) service manual and specs
    Icom IC-2GXA (IC 2 GXA IC2GXA) service manual and specs
    Icom IC-2GXAT (IC 2 GXAT IC2GXAT) service manual and specs
    Icom IC-2GXE (IC 2 GXE IC2GXE) service manual and specs
    Icom IC-2GXET (IC 2 GXET IC2GXET) service manual and specs
    Icom IC-2iE (IC 2 iE IC2iE) service manual and specs
    Icom IC-2N (IC 2 N IC2N) service manual and specs
    Icom IC-2SAT (IC 2 SAT IC2SAT) service manual and specs
    Icom IC-2SE (IC 2 SE IC2SE) service manual and specs
    Icom IC-2SET (IC 2 SET IC2SET) service manual and specs
    Icom IC-2SRE (IC 2 SRE IC2SRE) service manual and specs
    Icom IC-3AT (IC 3 AT IC3AT) service manual and specs
    Icom IC-3J (IC 3 J IC3J) service manual and specs
    Icom IC-3N (IC 3 N IC3N) service manual and specs
    Icom IC-3SAT (IC 3 SAT IC3SAT) service manual and specs
    Icom IC-4E (IC 4 E IC4E) service manual and specs
    Icom IC-4GE (IC 4 GE IC4GE) service manual and specs
    Icom IC-4GXE (IC 4 GXE IC4GXE) service manual and specs
    Icom IC-4GXET (IC 4 GXET IC4GXET) service manual and specs
    Icom IC-4IE (IC 4 IE IC4IE) service manual and specs
    Icom IC-4SE (IC 4 SE IC4SE) service manual and specs
    Icom IC-4SET (IC 4 SET IC4SET) service manual and specs
    Icom IC-12AT (IC 12 AT IC12AT) service manual and specs
    Icom IC-12E (IC 12 E IC12E) service manual and specs
    Icom IC-12GAT (IC 12 GAT IC12GAT) service manual and specs
    Icom IC-24AT (IC 24 AT IC24AT) service manual and specs
    Icom IC-32E (IC 32 E IC32E) service manual and specs
    Icom IC-202 (IC 202 IC202) service manual and specs
    Icom IC-202S (IC 202 S IC202S) service manual and specs
    Icom IC-215E (IC 215 E IC215E) service manual and specs
    Icom IC-402 (IC 402 IC402) service manual and specs
    Icom IC-502 (IC 502 IC502) service manual and specs
    Icom IC-505 (IC 505 IC505) service manual and specs
    Icom ID-91 (ID 91 ID91) service manual and specs
    Icom IC-E91 (IC E 91 ICE91) service manual and specs
    Icom IC-V85 (IC V 85 ICV85) service manual and specs
    Icom IC-92AD (IC 92 AD IC92AD) service manual and specs
    Icom ID-51A (ID 51 A ID51A) service manual and specs
    Icom ID-51E (ID 51 E ID51E) service manual and specs
    Icom IC-80AD (IC 80 AD IC80AD) service manual and specs
    Icom IC-T70A (IC T 70A ICT70A) service manual and specs
    Icom IC-T70E (IC T 70E ICT70E) service manual and specs
    Icom IC-V80 (IC V 80 ICV80) service manual and specs
    Icom ID-31A (ID 31 A ID31A) service manual and specs
    Icom ID-31E (ID 31 E ID31E) service manual and specs

Icom VHF/UHF Mobile Transceivers:
    Icom FDAM-1 (FDAM 1 FDAM1) service manual and specs
    Icom FDAM-3 (FDAM 3 FDAM3) service manual and specs
    Icom IC-Delta 100 (IC Delta 100 ICDelta100) service manual and specs
    Icom IC-Delta 100H (IC Delta 100H ICDelta100H) service manual and specs
    Icom IC E-208 (IC E 208 ICE208) service manual and specs
    Icom IC-V8000 (IC V 8000 ICV8000) service manual and specs
    Icom IC-20 (IC 20 IC20) service manual and specs
    Icom IC-22 (IC 22 IC22) service manual and specs
    Icom IC-22A (IC 22 A IC22A) service manual and specs
    Icom IC-24E (IC 24 E IC24E) service manual and specs
    Icom IC-25A (IC 25 A IC25A) service manual and specs
    Icom IC-25E (IC 25 E IC25E) service manual and specs
    Icom IC-25H (IC 25 H IC25H) service manual and specs
    Icom IC-27A (IC 27 A IC27A) service manual and specs
    Icom IC-27E (IC 27 E IC27E) service manual and specs
    Icom IC-27H (IC 27 H IC27H) service manual and specs
    Icom IC-28A (IC 28 A IC28A) service manual and specs
    Icom IC-28E (IC 28 E IC28E) service manual and specs
    Icom IC-28H (IC 28 H IC28H) service manual and specs
    Icom IC-30A (IC 30 A IC30A) service manual and specs
    Icom IC-37A (IC 37 A IC37A) service manual and specs
    Icom IC-38A (IC 38 A IC38A) service manual and specs
    Icom IC-45E (IC 45 E IC45E) service manual and specs
    Icom IC-47E (IC 47 E IC47E) service manual and specs
    Icom IC-48E (IC 48 E IC48E) service manual and specs
    Icom IC-120 (IC 120 IC120) service manual and specs
    Icom IC-207H (IC 207 H IC207H) service manual and specs
    Icom IC-208D (IC 208 D IC208D) service manual and specs
    Icom IC-208H (IC 208 H IC208H) service manual and specs
    Icom IC-225 (IC 225 IC225) service manual and specs
    Icom IC-228A (IC 228 A IC228A) service manual and specs
    Icom IC-228E (IC 228 E IC228E) service manual and specs
    Icom IC-228H (IC 228 H IC228H) service manual and specs
    Icom IC-229A (IC 229 A IC229A) service manual and specs
    Icom IC-229E (IC 229 E IC229E) service manual and specs
    Icom IC-229H (IC 229 H IC229H) service manual and specs
    Icom IC-232 (IC 232 IC232) service manual and specs
    Icom IC-240 (IC 240 IC240) service manual and specs
    Icom IC-245E (IC 245 E IC245E) service manual and specs
    Icom IC-255A (IC 255 A IC255A) service manual and specs
    Icom IC-255E (IC 255 E IC255E) service manual and specs
    Icom IC-260A (IC 260 A IC260A) service manual and specs
    Icom IC-260E (IC 260 E IC260E) service manual and specs
    Icom IC-280E (IC 280 E IC280E) service manual and specs
    Icom IC-281H (IC 281 H IC281H) service manual and specs
    Icom IC-290D (IC 290 D IC290D) service manual and specs
    Icom IC-290E (IC 290 E IC290E) service manual and specs
    Icom IC-290H (IC 290 H IC290H) service manual and specs
    Icom IC-390 (IC 390 IC390) service manual and specs
    Icom IC-448E (IC 448 E IC448E) service manual and specs
    Icom IC-449E (IC 449 E IC449E) service manual and specs
    Icom IC-481H (IC 481 H IC481H) service manual and specs
    Icom IC-490A (IC 490 A IC490A) service manual and specs
    Icom IC-490E (IC 490 E IC490E) service manual and specs
    Icom IC-560 (IC 560 IC560) service manual and specs
    Icom IC-681 (IC 681 IC681) service manual and specs
    Icom IC-900A (IC 900 A IC900A) service manual and specs
    Icom IC-900E (IC 900 E IC900E) service manual and specs
    Icom IC-901A (IC 901 A IC901A) service manual and specs
    Icom IC-901E (IC 901 E IC901E) service manual and specs
    Icom IC-1200 (IC 1200 IC1200) service manual and specs
    Icom IC-1201 (IC 1201 IC1201) service manual and specs
    Icom IC-2000H (IC 2000 H IC2000H) service manual and specs
    Icom IC-2100H (IC 2100 H IC2100H) service manual and specs
    Icom IC-2200H (IC 2200 H IC2200H) service manual and specs
    Icom IC-2330A (IC 2330 A IC2330A) service manual and specs
    Icom IC-2340H (IC 2340 H IC2340H) service manual and specs
    Icom IC-2350H (IC 2350 H IC2350H) service manual and specs
    Icom IC-2400A (IC 2400 A IC2400A) service manual and specs
    Icom IC-2410E (IC 2410 E IC2410E) service manual and specs
    Icom IC-2410H (IC 2410 H IC2410H) service manual and specs
    Icom IC-2500A (IC 2500 A IC2500A) service manual and specs
    Icom IC-2500E (IC 2500 E IC2500E) service manual and specs
    Icom IC-2700H (IC 2700 H IC2700H) service manual and specs
    Icom IC-2710H (IC 2710 H IC2710H) service manual and specs
    Icom IC-2720H (IC 2720 H IC2720H) service manual and specs
    Icom IC-2725E (IC 2725 E IC2725E) service manual and specs
    Icom IC-2800H (IC 2800 H IC2800H) service manual and specs
    Icom IC-3200E (IC 3200 E IC3200E) service manual and specs
    Icom IC-3210A (IC 3210 A IC3210A) service manual and specs
    Icom IC-3210E (IC 3210 E IC3210E) service manual and specs
    Icom IC-3220E (IC 3220 E IC3220E) service manual and specs
    Icom IC-3220H (IC 3220 H IC3220H) service manual and specs
    Icom IC-3230H (IC 3230 H IC3230H) service manual and specs
    Icom IC-3700 (IC 3700 IC3700) service manual and specs
    Icom IC-F7000 (IC F 7000 ICF7000) service manual and specs
    Icom ID-1 (ID 1 ID1) service manual and specs
    Icom ID-800D (ID 800 D ID800D) service manual and specs
    Icom ID-800H (ID 800 H ID800H) service manual and specs
    Icom IC-2820H (IC 2820 H IC2820H) service manual and specs
    Icom IC-E2820 (IC E 2820 ICE2820) service manual and specs
    Icom IC-2300H (IC 2300 H IC2300H) service manual and specs
    Icom ID-880H (ID 880 H ID880H) service manual and specs

Icom Base VHF/UHF:
    Icom IC-21A (IC 21 A IC21A) service manual and specs
    Icom IC-31 (IC 31 IC31) service manual and specs
    Icom IC-71 (IC 71 IC71) service manual and specs
    Icom IC-201 (IC 201 IC201) service manual and specs
    Icom IC-210 (IC 210 IC210) service manual and specs
    Icom IC-211 (IC 211 IC211) service manual and specs
    Icom IC-211E (IC 211 E IC211E) service manual and specs
    Icom IC-221 (IC 221 IC221) service manual and specs
    Icom IC-251E (IC 251 E IC251E) service manual and specs
    Icom IC-271A (IC 271 A IC271A) service manual and specs
    Icom IC-271E (IC 271 E IC271E) service manual and specs
    Icom IC-271H (IC 271 H IC271H) service manual and specs
    Icom IC-275E (IC 275 E IC275E) service manual and specs
    Icom IC-275H (IC 275 H IC275H) service manual and specs
    Icom IC-375D (IC 375 D IC375D) service manual and specs
    Icom IC-451E (IC 451 E IC451E) service manual and specs
    Icom IC-471E (IC 471 E IC471E) service manual and specs
    Icom IC-471H (IC 471 H IC471H) service manual and specs
    Icom IC-475E (IC 475 E IC475E) service manual and specs
    Icom IC-475H (IC 475 H IC475H) service manual and specs
    Icom IC-501 (IC 501 IC501) service manual and specs
    Icom IC-551 (IC 551 IC551) service manual and specs
    Icom IC-551D (IC 551 D IC551D) service manual and specs
    Icom IC-575 (IC 575 IC575) service manual and specs
    Icom IC-820H (IC 820 H IC820H) service manual and specs
    Icom IC-821H (IC 821 H IC821H) service manual and specs
    Icom IC-910D (IC 910 D IC910D) service manual and specs
    Icom IC-910H (IC 910 H IC910H) service manual and specs
    Icom IC-970E (IC 970 E IC970E) service manual and specs
    Icom IC-970H (IC 970 H IC970H) service manual and specs
    Icom IC-1271 (IC 1271 IC1271) service manual and specs

Icom HF and More Transceivers:
    Icom IC-701 (IC 701 IC701) service manual and specs
    Icom IC-703 (IC 703 IC703) service manual and specs
    Icom IC 706 (Icom IC-706 IC706) service manual and specs
    Icom IC-706 MKII (IC 706 MKII IC706MKII) service manual and specs
    Icom IC 706 MKIIG (IC-706 MKIIG IC706MKIIG) service manual and specs
    Icom IC-707 (IC 707 IC707) service manual and specs
    Icom IC-710 (IC 710 IC710) service manual and specs
    Icom IC-718 (IC 718 IC718) service manual and specs
    Icom IC-720 (IC 720 IC720) service manual and specs
    Icom IC-720A (IC 720 A IC720A) service manual and specs
    Icom IC-725 (IC 725 IC725) service manual and specs
    Icom IC-726 (IC 726 IC726) service manual and specs
    Icom IC-728 (IC 728 IC728) service manual and specs
    Icom IC-729 (IC 729 IC729) service manual and specs
    Icom IC-730 (IC 730 IC730) service manual and specs
    Icom IC-735 (IC 735 IC735) service manual and specs
    Icom IC-736 (IC 736 IC736) service manual and specs
    Icom IC-737 (IC 737 IC737) service manual and specs
    Icom IC-737A (IC 737 A IC737A) service manual and specs
    Icom IC-738 (IC 738 IC738) service manual and specs
    Icom IC-740 (IC 740 IC740) service manual and specs
    Icom IC-741 (IC 741 IC741) service manual and specs
    Icom IC-745 (IC 745 IC745) service manual and specs
    Icom IC-746 (IC 746 IC746) service manual and specs
    Icom IC-746 PRO (IC 746 PRO IC746PRO) service manual and specs
    Icom IC-750 (IC 750 IC750) service manual and specs
    Icom IC-751 (IC 751 IC751) service manual and specs
    Icom IC-751A (IC 751 A IC751A) service manual and specs
    Icom IC-756 (IC 756 IC756) service manual and specs
    Icom IC-756 PRO (IC 756 PRO IC756PRO) service manual and specs
    Icom IC-756 PRO II (IC 756 PRO II IC756PROII) service manual and specs
    Icom IC-756PROIII (IC 756 PRO III IC756PROIII) service manual and specs
    Icom IC-760 (IC 760 IC760) service manual and specs
    Icom IC-761 (IC 761 IC761) service manual and specs
    Icom IC-765 (IC 765 IC765) service manual and specs
    Icom IC-775 (IC 775 IC775) service manual and specs
    Icom IC-775DSP (IC 775 DSP IC775DSP) service manual and specs
    Icom IC-780 (IC 780 IC780) service manual and specs
    Icom IC-781 (IC 781 IC781) service manual and specs
    Icom IC-7000 (IC 7000 IC7000) service manual and specs
    Icom IC-7400 (IC 7400 IC7400) service manual and specs
    Icom IC-7800 (IC 7800 IC7800) service manual and specs
    Icom X3 (X 3) service manual and specs
    Icom IC-7700 (IC 7700 IC7700) service manual and specs
    Icom IC-7100 (IC 7100 IC7100) service manual and specs
    Icom IC-7200 (IC 7200 IC7200) service manual and specs
    Icom IC-7410 (IC 7410 IC7410) service manual and specs
    Icom IC-7600 (IC 7600 IC7600) service manual and specs
    Icom IC-9100 (IC 9100 IC9100) service manual and specs
    Icom IC-78 (IC 78 IC78) service manual and specs

Icom receiver/scanner:
    Icom IC-R1500 (IC R 1500 ICR1500) service manual and specs
    Icom IC-PCR1500 (IC PCR 1500 ICPCR1500) service manual and specs
    Icom IC-R2500 (IC R 2500 ICR2500) service manual and specs
    Icom IC-PCR2500 (IC PCR 2500 ICPCR2500) service manual and specs
    Icom IC-R9500 (IC R 9500 ICR9500) service manual and specs

CB Equipment


President
Midland
Uniden
Zodiac

 Power amplifiers


Beko
Icom
Alinco
Drake
Yaesu
Daiwa
Collins
Kenwood
DanAmps
Ameritron
Autophon
Eto/Alpha
Command Technologies
E.F.Johnson
Dentron Radio Co.

FRS/GMRS


Bell
GPX
ENC
Tekk
Icom
Sony
Alinco
Drake
Cobra
Maxon
Vertex
Conair
Uniden
Jenson
Ranger
Midland
Whistler
Magnum
Unwired
Coleman
Motorola
Audiovox
Memorex
Columbia
Samsung
Standard
Kenwood
Cherokee
Panasonic
Freetalker
Vtech Vtalk
RadioShack
Fanon Courier
Sharper Image
General Electric
Oregon Scientific

PMR446


Sommerkamp
FreeQuency
Goodmans
Kenwood
Lafayette
President
Binatone
Motorola
Multicom
Albrecht
Maycom
Topcom
Xtreme
Ondico
Telcom
Maxon
Vertex
Zodiac
Yaesu
Cobra
Alinco
Icom
Alan
ITT