Modifications for the ICOM - RogerK

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This modification is read 2160 times.top of page20-10-2001(IC-2800) Screen saver Turn OFF option for IC-2800Author: Chuck Lynn - stang@tds.net.MODIFICATION.NETWhen the unit is turned off, simultaneously depress the "CHANG/L" key and the "POWER" key. Both located on the bottomcorners of the control head.Sceen saver mode will be suspended.To reactivate sceen saver mode repeat the above step.73KG4FKUChuckThis modification is read 2132 times.top of page13-01-2002(IC-2800) Cross Band Repeat for IC-2800Author: KC5VCF - KC5VCF@hotmail.com.MODIFICATION.NETTo cross band repeat with the IC2800Hold down simutanisuly CHG/L and both MAIN/EDIT buttons.This modification is read 1221 times.top of page17-02-2002(IC-2800) Enable crossband function for IC-2800Author: - helmut.knaak@t-online.de.MODIFICATION.NETUnsolder or cut D 60 (near W 13)Press "Main UHF,Main VHF,Chg/L"For 2 seconds, crossband will be enabled...This modification is read 649 times.top of page19-07-1998(IC-281) Crossband repeatTo enable crossband repeat press and hold the BAND key and the SET key for about a second, a flashing L will appear in thelower right. To turn off hold the SET key.Unfortunately code squelch does not seem to work when crossband repeat is enabled. Don't know about tone squelch.This modification is read 877 times.top of page
19-07-1998(IC-281) Extended Receive for IC-281To enable extended receive a jumper has to be removed. To enable extended transmit a diode has to be removed. I have onlytested the extended receive which gives you from 118-174.995 and 320-479.995.Open the case by removing all the screws on the top, bottom and left/right sides and separating the top and bottom covers fromthe chassis.Next remove the plastic front panel that covers the logic circuit board by removing the two top and two bottom screws thatattach it to the chassis.Next remove the front panel logic board by taking out the four front screws that attach it to the chassis.Position the logic board so that the side normally near the chassis is on top and a round flat battery attached via leads is visiblewith the connector near the bottom and the cut out at the bottom right.Below the battery on the lower right there are a number of diodes, most likely surfaced mounted. Look just to the left of thediodes, there will be a very small surface mount jumper at the bottom (-#WW#- on diagram below). There is no silk screen onthe board to identify it (on mine at least) but the part itself may have a zero printed on it for zero ohms. Removing this jumperwill give you extended receive capability.Diagram (very bad but hopefully you get the idea)R O U N DB A T T E R Y! ! ! ! !! # # # # -#D#-D D D D -#D#- -#D## # # # ! -#D#- -#D#--#WW#- ! ! ! ! -#D#- -***-This modification is read 932 times.top of page19-07-1998(IC-281) Extended Transmit for IC-281By removing one of the diodes in the area mentioned above extended transmit is purported to be possible. I have not verifiedthis since I don't need this capability but it is supposed to significantly extend the transmit capability in the VHF band.To enable extended transmit remove the diode that is most near the right hand bottom part of the board as indicated in thediagram above with -***-.Reassemble and reset CPU per instruction manual.Note:When you reset the CPU you loose all memory and have too re-program all.This modification is read 899 times.top of page19-07-1998(IC-2AT) Coverage IC-2AT 140-150 MHzIf you have studied the schematic diagram for this radio, you will notice that pins 15 and 16 are not indicated on theprogrammable divider chip IC1 (TC9122).By simply connecting pin 15 thru a switch to pin 1, you will be able to move the radio up in frequency by 10 MHZ.Some of these radios were sold without covering 140-150 MHZ.The modification for this extended coverage is described below:1. Open up the radio and locate the FLEXIBLE BOARD, this connects the thumbwheel switches to the MAIN BOARD.2. At the MAIN BOARD end of the FLEXIBLE BOARD, add a jumper at location C4. There should already be a jumper at locationC2.
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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
Page 39 and 40: 19-07-1998(IC-22) Icom IC22S Packet
Page 41 and 42: This modification is read 739 times
Page 43 and 44: More detailed:In the true spirit of
Page 45 and 46: 19-07-1998(IC-229) IC-229H Fix CPU/
Page 47 and 48: In addition, if you want to put an
Page 49 and 50: By diode:●●Remove D17 diode on
Page 51 and 52: 1. Remove diode D14 (if there is an
Page 53 and 54: cut... I'm guessing, but it could b
Page 55 and 56: 19-07-1998(IC-24) IC-24AT enabling
Page 57 and 58: 19-07-1998(IC-24) Tip to to functio
Page 59 and 60: This complete the mods done with su
Page 63 and 64: Comment:These TRX is accorded to my
Page 65 and 66: this mod of use as I have.Any comme
Page 67 and 68: other wires come in. Take the cable
Page 69 and 70: 17-11-2000(IC-2700) Enabling ICOM 2
Page 71 and 72: 19-07-1998(IC-271) IC-271 / 471 fue
Page 73 and 74: RAM card version B images:This modi
Page 75 and 76: 12-11-2000(IC-2710) Crossband Repea
Page 77 and 78: Note:From Bill K7RIEICOM has not tr
Page 79 and 80: 19-07-1998(IC-275) Improve the stab
Page 81 and 82: ●●●●●●●●●●remov
Page 83 and 84: Note: a strong signal will be serio
Page 85 and 86: 19-07-1998(IC-28) The long, noisy s
Page 87 and 88: not a hard mod to do,..........but
Page 89: 02-04-2000(IC-2800) IC-2800H cross
Page 93 and 94: encased it in shrink-tube. The oper
Page 95 and 96: push buttonswitch ^ ^| |___________
Page 97 and 98: 19-07-1998(IC-2IA) IC-2IA lousey xm
Page 99 and 100: 1. Change to RECEIVER MODE (not rec
Page 101 and 102: 13.0V 5.0W12.0V 5.0W11.0V 5.0W10.0V
Page 105 and 106: MODIFICATION (Refer to figure 1.)1.
Page 107 and 108: Procedure1. Remove the covers from
Page 109 and 110: 19-07-1998(IC-3200) Fix for IC-3200
Page 111 and 112: 4. select a frequency of 150.000Mhz
Page 113 and 114: 19-07-1998(IC-3220) How to iface Ic
Page 115 and 116: Now power on and type in the freque
Page 117 and 118: One note on the above - the BNC con
Page 119 and 120: e shorted to ground and cause PLL u
Page 121 and 122: 19-07-1998(IC-451) IC-451 aus 9600F
Page 123 and 124: 3. If by accident you lose power to
Page 125 and 126: 19-07-1998(IC-475) IC-475 Freq. ste
Page 127 and 128: Problem:This is a general transceiv
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Page 133 and 134: Dieses ist mit dieser Schaltung als
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Page 139 and 140: Remove the back cover. If you place
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27-10-1998(IC-575) SSB RF GainProbl
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26-06-2001(IC-575) Pass band Tuning
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The trimpot leads will need to bent
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19-07-1998(IC-706) Info/mods for IC
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¦ ¦¦ ¦¦ ¦¦ ¦¦ ¦----------
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●●●●●●●●●●●
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From: gary@ke4zv.atl.ga.us (Gary Co
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Mehr Dynamik in der Modulation beko
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Operation:Be sure to read the manua
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Alternative zum modifizierten PC St
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●●●●●(Another receiver wi
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| IC31 uPD4094BG || |1 2 3 4 |5 6 7
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D116 and D118 are responsible for o
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Transmit power output after modific
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This information and photos was sup
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22-02-2002(IC-706MKII) IC-706MKIIG
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Delete cap. CT14 at pin 6 of IC3 on
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18-06-2000(IC-729) Using two Icom r
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19-07-1998(IC-735) IC-735 Remote Wo
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19-07-1998(IC-736) Icom IC-736 DDS/
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Also probably would apply to IC 735
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RAM card version B images:This modi
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John Schmitz NS8EAdditional informa
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13-01-2002(IC-746) Monitor Audio Ou
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19-07-1998(IC-751) IC-751 Bad Cap P
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inspect your job to be sure that th
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28-01-2002(IC-751) ICOM IC-751 Dual
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Step 8: Turn the radio off and inst
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To be neater you could remove the s
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[W804] | |Remove=>[W805] | CHIP |[W
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Date: 23-02-2002 User comment From:
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less.The second way to adjust the I
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23-11-2001(IC-756pro2) IC-756PRO2 T
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19-07-1998(IC-765) Icom IC-765 Pass
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19-07-1998(IC-775) New product info
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70% AM.My personal findings are tha
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11. Re-install board and all cables
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The Yaesu FT726R first appeared ten
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There seemed to be no way of changi
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Add a diode on the blank position b
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---- gar keine Diode ----Breitband
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To disable the x-band repeater just
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Well this should make things verry
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Set radio in VFO mode, and select f
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27-05-2001(IC-910) Expanded functio
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●●●350-470 MHz RX/TX800-950 M
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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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