Modifications for the ICOM - RogerK

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I have tested this mod with a ic-756 and it works great, the noise has gone down with about 50% and the PS85 works as goodas before the mod.How to proceed (after building the above)Remove upper and lower covers.
You must find a place to drill a hole for the NTC close to the diodesBegin with drilling a hole of 3.5mm (just look on the inside so You wont drill thru a component).
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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
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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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Page 258 and 259: BOOT:Attenuator protecs strong sign
Page 260 and 261: 1. Use an ohmmeter to determine whi
Page 262 and 263: 2. Remove battery cover and battery
Page 264 and 265: Fig. 4. Receiving AO-40 (at MA=13)O
Page 266 and 267: This modification can also be found
Page 268 and 269: The Q and not Q outputs on this IC
Page 270 and 271: Date: 30-12-2001 User comment From:
Page 272 and 273: This modification is read 3462 time
Page 274 and 275: Removing 1F unit1. Pull the 2 knobs
Page 276 and 277: 16-05-1999(IC-T8) Problem with the
Page 278 and 279: 800 -
Page 280 and 281: Frequencyrange after modification:5
Page 282 and 283: Offset Freq: Hold [FUNC], Press [4]
Page 284 and 285: This modification is read 866 times
Page 286 and 287: The Icom IC W21AT handi-talkie norm
Page 288 and 289: 19-07-1998(IC-W2A) IC-W2A signal le
Page 290 and 291: 19-07-1998(IC-W31) IC-W31E CROSS-BA
Page 292 and 293: 15-10-2000(IC-W31) Cross Band Repea
Page 294 and 295: could always try it.Set VHF and UHF
Page 296 and 297: 31-07-2001(IC-W32) Icom IC-W32A pro
Page 302 and 303: IC-4GAT - Turn the radio on, hold [
Page 304 and 305: IC-M9 - Hold [HI/LO] & [DW/SCAN] bu
Page 306 and 307: IC-275H 10IC-375A 12IC-471 22IC-475
Page 310 and 311: How further up the hole is the bett
Page 312 and 313: Connect the NTC, FAN and power and
Page 314 and 315: 5, 31, 48, and 79.4. Does the Prior
Page 316 and 317: 19-07-1998(R-7000) Modify your ICOM
Page 318 and 319: 1. C231 from 1000 pf to 68 pf.2. C2
Page 324 and 325: 19-07-1998(R-71) Tricking the ICOM
Page 326 and 327: There are two wires which send logi
Page 328 and 329: A. Remove the top cover of the rece
Page 330 and 331: 08-11-1998(R-7100) Modify your Icom
Page 332 and 333: 17-03-2002(R-7100) Icom R7100 Discr
Page 334: 23-08-1998(R-8500) Operating the Ic
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Modifications for the ICOM - RogerK

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