Modifications for the ICOM - RogerK

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13-01-2002(IC-746) Monitor Audio Output Too LowAuthor: - heloxx@hotmail.com.MODIFICATION.NETThe monitor function on the IC-746 tends to have low output compared to receiver AF volume, therefore in order to listen toyourself, you have to increase the volume. When the PTT is released back to receive mode, the AF setting nearly blows yourspeaker or your headphones.If the monitor audio output is too low on your ICOM 746, you can add 4.7K resistor in parallel with R1087. This brings up thegain of IC1082 to a more reasonable level that can still be controlled by the monitor level function but with plenty more gain.Technical Notes:These SMDs are located in the Main Board. You will probably need a service manual to locate these parts on the main board.Adding modifications to these very small parts requires some skill and a good magnifier together with the appropriate tools. A1/8 Watt resistor will be suitable for this modification, but still require some precision.This modification is read 1450 times.top of page25-01-2002(IC-746) Schematic for ICOM CI-V OptionAuthor: Rick Pemble - pemble@ix.netcom.com.MODIFICATION.NETThis is a messge from usenet alt.ham-radioThere is the interface. This one shows a 5 radio hookup -- just use the one jack if that is all you want. The inductors are all RFIsuppressors, you can skip them if you want (L1, L2, L3, L4, as well as C5). The important parts are the five 22uF electrolytics,the Max232 IC and the 7805 regulator.Easy to build -- works fine.cheersRick W4RPTod J. Knapp wrote in message ...>I'm looking to build a CI-V unit for my ICOM 746. Although I'm not really>looking forward to giving ICOM $100 (or more) for a computer to radio>feature, I'd sure enjoy the experience building such a unit.>>CI-V allows your computer to communicate with your ICOM radio.>>Does such a WORKABLE schematic exist? Has anyone tried it?>>Please advise...>>Tod N9ZWY
This modification is read 1300 times.top of page27-12-2001(ic-746pro) TX modification for IC-746PRO (version #02 USA)Author: Astra - astra@softhome.net.MODIFICATION.NET1. Remove the bottom cover of IC-746PRO.2. Remove DSP subbblock.3. Carefully remove two small SMD 0 ohm resistors(jumpers) W1603 and W1604, on the pictures both jumpers alreadyremoved, reset of IC-746PRO is not necessary.4. Enjoy.`````````````````````.TX/RX after modification: 0.1 - 0 MHz, 108 - 174 MHz.Now you can do SWR spot & plot measurement even out of ham bands! Be carefully with transmitting out of 1,8 - 29,7 and 144-148 MHz.Best regards,Astra
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Modifications for the ICOMcreated 2
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(IC-271)(IC-271)(IC-271)(IC-2710)(I
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(IC-475)(IC-475)(IC-475)(IC-475)(IC
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(IC-756pro) Expand tx-freqeuncy for
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(IC-W2E)(IC-W31)(IC-W31)(IC-W31)(IC
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2. After about 0.5 second, press st
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21-10-1999(AT-500) ICOM AT-500 Tune
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4. Program the radio to the local w
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19-07-1998(IC-03) ICOM 02/03/04 & V
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This modification is read 553 times
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6. Reinstall the RAM board into the
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27-10-1998(IC-1275) Power control m
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27-10-1998(IC-1275) Modification of
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●Connect the short plug end with
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This modification is read 1316 time
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50MHz to something like 204MHz cont
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26-07-2001(IC-207) Band Expansion f
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Fig. 3: The circuit extract from IC
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19-07-1998(IC-22) Icom IC22S Packet
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More detailed:In the true spirit of
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19-07-1998(IC-229) IC-229H Fix CPU/
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In addition, if you want to put an
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By diode:●●Remove D17 diode on
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1. Remove diode D14 (if there is an
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cut... I'm guessing, but it could b
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19-07-1998(IC-24) IC-24AT enabling
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19-07-1998(IC-24) Tip to to functio
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This complete the mods done with su
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Comment:These TRX is accorded to my
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this mod of use as I have.Any comme
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other wires come in. Take the cable
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17-11-2000(IC-2700) Enabling ICOM 2
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19-07-1998(IC-271) IC-271 / 471 fue
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RAM card version B images:This modi
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12-11-2000(IC-2710) Crossband Repea
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Note:From Bill K7RIEICOM has not tr
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19-07-1998(IC-275) Improve the stab
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●●●●●●●●●●remov
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Note: a strong signal will be serio
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19-07-1998(IC-28) The long, noisy s
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not a hard mod to do,..........but
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02-04-2000(IC-2800) IC-2800H cross
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19-07-1998(IC-281) Extended Receive
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encased it in shrink-tube. The oper
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push buttonswitch ^ ^| |___________
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19-07-1998(IC-2IA) IC-2IA lousey xm
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1. Change to RECEIVER MODE (not rec
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13.0V 5.0W12.0V 5.0W11.0V 5.0W10.0V
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MODIFICATION (Refer to figure 1.)1.
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Procedure1. Remove the covers from
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19-07-1998(IC-3200) Fix for IC-3200
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4. select a frequency of 150.000Mhz
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19-07-1998(IC-3220) How to iface Ic
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Now power on and type in the freque
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One note on the above - the BNC con
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e shorted to ground and cause PLL u
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19-07-1998(IC-451) IC-451 aus 9600F
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3. If by accident you lose power to
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19-07-1998(IC-475) IC-475 Freq. ste
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Problem:This is a general transceiv
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Note: a strong signal will be serio
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Das spart einen mords Haufen Arbeit
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Dieses ist mit dieser Schaltung als
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X . X . 5.0 KHz 1 0 1 0. . . . X .
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Remove the back cover. If you place
Page 141 and 142: 27-10-1998(IC-575) SSB RF GainProbl
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Page 145 and 146: The trimpot leads will need to bent
Page 147 and 148: 19-07-1998(IC-706) Info/mods for IC
Page 149 and 150: ¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦----------
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Page 154 and 155: From: gary@ke4zv.atl.ga.us (Gary Co
Page 156 and 157: Mehr Dynamik in der Modulation beko
Page 158 and 159: Operation:Be sure to read the manua
Page 160 and 161: Alternative zum modifizierten PC St
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Page 164 and 165: | IC31 uPD4094BG || |1 2 3 4 |5 6 7
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Page 178 and 179: Delete cap. CT14 at pin 6 of IC3 on
Page 180 and 181: 18-06-2000(IC-729) Using two Icom r
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Page 186 and 187: Also probably would apply to IC 735
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Page 190 and 191: John Schmitz NS8EAdditional informa
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Page 198 and 199: inspect your job to be sure that th
Page 200 and 201: 28-01-2002(IC-751) ICOM IC-751 Dual
Page 202 and 203: Step 8: Turn the radio off and inst
Page 204 and 205: To be neater you could remove the s
Page 206 and 207: [W804] | |Remove=>[W805] | CHIP |[W
Page 208 and 209: Date: 23-02-2002 User comment From:
Page 210 and 211: less.The second way to adjust the I
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Page 218 and 219: 70% AM.My personal findings are tha
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Page 226 and 227: Add a diode on the blank position b
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Page 232 and 233: Well this should make things verry
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1. You're completely successful.2.
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●●●●●●●●●Für Han
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28-03-1999(IC-Q7) Modifying the ICO
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●●●●●●●●Desoldering
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You should now have the RF board co
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BOOT:Attenuator protecs strong sign
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1. Use an ohmmeter to determine whi
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2. Remove battery cover and battery
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Fig. 4. Receiving AO-40 (at MA=13)O
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This modification can also be found
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The Q and not Q outputs on this IC
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Date: 30-12-2001 User comment From:
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Removing 1F unit1. Pull the 2 knobs
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16-05-1999(IC-T8) Problem with the
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800 -
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Frequencyrange after modification:5
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Offset Freq: Hold [FUNC], Press [4]
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The Icom IC W21AT handi-talkie norm
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19-07-1998(IC-W2A) IC-W2A signal le
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19-07-1998(IC-W31) IC-W31E CROSS-BA
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15-10-2000(IC-W31) Cross Band Repea
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could always try it.Set VHF and UHF
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31-07-2001(IC-W32) Icom IC-W32A pro
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IC-4GAT - Turn the radio on, hold [
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IC-M9 - Hold [HI/LO] & [DW/SCAN] bu
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IC-275H 10IC-375A 12IC-471 22IC-475
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I have tested this mod with a ic-75
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How further up the hole is the bett
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Connect the NTC, FAN and power and
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5, 31, 48, and 79.4. Does the Prior
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19-07-1998(R-7000) Modify your ICOM
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1. C231 from 1000 pf to 68 pf.2. C2
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19-07-1998(R-71) Tricking the ICOM
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There are two wires which send logi
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A. Remove the top cover of the rece
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08-11-1998(R-7100) Modify your Icom
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17-03-2002(R-7100) Icom R7100 Discr
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23-08-1998(R-8500) Operating the Ic
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Modifications for the ICOM - RogerK

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