Modifications for the ICOM - RogerK

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23-11-2001(IC-756pro2) IC-756PRO2 TX mods 100 Khz - 60 MHzAuthor: Astra - astra@softhome.net.MODIFICATION.NET●●Open the IC-756PRO mods articlelook at the picture, it is similar for PRO2 model.● Remove only two lowest diodes marks as D3751 and D3752.●Reset is not necessary.Done!Now IC-756PRO2 will transmit from 100 kHz to 60 MHz without any gaps!!! Dunno about RF power on 136 kHz, could be itpossible, anyway be carefully with transmitting lower than 1.8 MHz. Enjoy.This modification is read 2206 times.top of page17-03-2002(IC-756PRO2) TX expand on IC 756PROII #23 EU modelsAuthor: Hans , PA3HGT - pa3hgt@amsat.org.MODIFICATION.NETIf you have an IC756PROII version #23 EU-model and want expand the TX range: Read my article placed for IC756PRO andchange the diode-row according to "after version 3" mod. You've to remove 3 diodes ( D3752,3753 and 3754).Your Icom IC756PROII version #23 EU is original like the dioderow "version #03 before modification" that you can read in thearticle .The tx-range is 1,6 Mc - 30 Mc & 50 Mc - 54 Mc when you execute the mod.73 , Hans , PA3HGTThis modification is read 235 times.top of page
19-07-1998(IC-761) Wider SSB band on the IC-761When in SSB mode and the filter switch is in the "out position", your normal bandwidth is 2.6kHz. When the filer switch is in the"in position", your normal bandwidth is 2.4kHz. I have noticed there is a 3rd SSB bandwidth for receiving in the SSB mode.Leave the filter switch in the out position and place the IF shift button in the "in position" for IF shift, and now the bandwidth is 3to 3.2kHz wide.When using the filter switch only to select the advertised wide and narrow position for SSB bandwidth, you receive and transmitat those bandwidths and are using both the 9MHz and 455MHz filters; however, when using the above method as stated for thewider selectivity, it appears you are receiving through the wide ceramic 455MHz filter only, and bypassing the 9MHz filter. Sothere are three positions, not two.MODE 9MHZ 455 BANDWIDTHSSB FL-80 CFJ-455K5 2.6SSB FL-80 FJ-44A 2.4SSB By Passed CFJ-455K5 Approx 3.0This modification is read 740 times.top of page19-07-1998(IC-761) IC-761 activate tuner when in general coverage modRemove the top cover of the IC-761 and locate the tuner band switch unit PC Board which is the 2nd small PC board locatedbehind the antenna tuner preset unit.On the board, locate J 7 and at that location, you will note a three (3) pin molex plug with a black, brown, and red wireconnected to it. Either unplug, remove, or clip the center brown wire coming from the plug. Carefully unplugging the wire andplacing heat shrink tubing over the end works very well.This enables the tuner to be activated on GENERAL as well as the ham bands.This modification is read 708 times.top of page19-07-1998(IC-761) IC-761 Out of bandout of band transmitfor the ic-761on the front marker unitcut r-37 and you have all band transmit--(by wb1erg - steve)This modification is read 763 times.top of page19-07-1998(IC-765) Icom IC-765 improved monitor volumeFor radios with serial numbers below 20001. Set radio for 8 mhz in LSB2. Adjust C226 for 1 to 1.2V at R201.3. Verify that it goes to 3V at 7.9999MHzChange R85(10K) on main unit to 4.7K.This modification is read 1011 times.top of page
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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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Page 164 and 165: | IC31 uPD4094BG || |1 2 3 4 |5 6 7
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Page 168 and 169: D116 and D118 are responsible for o
Page 170 and 171: Transmit power output after modific
Page 172 and 173: This information and photos was sup
Page 174 and 175: 22-02-2002(IC-706MKII) IC-706MKIIG
Page 176 and 177: This modification is read 2320 time
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
Page 182 and 183: 19-07-1998(IC-735) IC-735 Remote Wo
Page 184 and 185: 19-07-1998(IC-736) Icom IC-736 DDS/
Page 186 and 187: Also probably would apply to IC 735
Page 188 and 189: RAM card version B images:This modi
Page 190 and 191: John Schmitz NS8EAdditional informa
Page 192 and 193: 13-01-2002(IC-746) Monitor Audio Ou
Page 196 and 197: 19-07-1998(IC-751) IC-751 Bad Cap P
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
Page 214 and 215: 19-07-1998(IC-765) Icom IC-765 Pass
Page 216 and 217: 19-07-1998(IC-775) New product info
Page 218 and 219: 70% AM.My personal findings are tha
Page 220 and 221: 11. Re-install board and all cables
Page 222 and 223: The Yaesu FT726R first appeared ten
Page 224 and 225: There seemed to be no way of changi
Page 226 and 227: Add a diode on the blank position b
Page 228 and 229: ---- gar keine Diode ----Breitband
Page 230 and 231: To disable the x-band repeater just
Page 232 and 233: Well this should make things verry
Page 234 and 235: Set radio in VFO mode, and select f
Page 236 and 237: 27-05-2001(IC-910) Expanded functio
Page 238 and 239: ●●●350-470 MHz RX/TX800-950 M
Page 244 and 245: 1. You're completely successful.2.
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Page 248: 28-03-1999(IC-Q7) Modifying the ICO
Page 252 and 253: ●●●●●●●●Desoldering
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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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