Modifications for the ICOM - RogerK

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Well this should make things verry easy for You, If there are anny problems or suggestions pse e-mail me:PE3HMP@hotmail.com.MODIFICATION.NETThis modification is read 935 times.top of page19-07-1998(IC-900) ICOM IC-900 Out of Band Modifications---------------------------------------------------------------------BAND OPERATING FREQ MATRIX CIRCUIT LOCATION CONDITION---- -------------- ----------------------- ---------28 Mhz 28 - 40 Mhz Remove D33 (3-B) RX OnlyRemove D33 (3-B) &TX/RXInstall Diode at 3-A---------------------------------------------------------------------50 Mhz 40 - 54 Mhz Remove D32 (4-B) RX OnlyRemove D32 (4-B) &TX/RXInstall Diode at 4-A---------------------------------------------------------------------144 Mhz 138 - 174 Mhz Remove D27 (1-D) RX OnlyRemove D27 (1-D) &TX/RXInstall Diode at 1-C---------------------------------------------------------------------220 Mhz 216 - 236 Mhz Remove D26 (2-D) RX OnlyRemove D26 (2-D) &TX/RXInstall Diode at 2-C---------------------------------------------------------------------440 Mhz 420 - 470 Mhz Remove D25 (3-B) RX OnlyRemove D25 (3-B) &TX/RXInstall Diode at 3-C---------------------------------------------------------------------
1200 Mhz ------------- -------------------- ----------------------------------------------------------------------------Diodes are 1SS-211 or any high quality silicon signal diode Matrix is located at display-B of EX-601 remote controller.D36 D32 D28 D24 D20 D16 D12 D8 4D37 D33 D29 D25 D21 D17 D13 D9 3D38 D34 D30 D26 D22 D18 D14 D10 2D39 D35 D31 D27 D23 D19 D15 D11 1A B C D E F G HAll changes are made in the control head.Diodes are arranged in a 8x4 array: A-H, 1-4.As shipped from the factory, the diodes are arranged thusly:X = diode in place____________________________________| | X | X | | | | | X | 4|---|---|---|---|---|---|---|---|---| | X | | X | | | | | 3|---|---|---|---|---|---|---|---|---| | X | | | | X | | X | 2|---|---|---|---|---|---|---|---|---| | | | | | | | X | 1|---|---|---|---|---|---|---|---|---| A | B | C | D | E | F | G | H |To add receive coverage on 6 meter and 70 cm bands only:C=cut diode, or remove____________________________________| | C | X | | | | | X | 4|---|---|---|---|---|---|---|---|---| | X | | C | | | | | 3|---|---|---|---|---|---|---|---|---| | X | | | | X | | X | 2|---|---|---|---|---|---|---|---|---| | | | | | | | X | 1|---|---|---|---|---|---|---|---|---| A | B | C | D | E | F | G | H |440 Band - to expand coverage from 420 - 470 MHz:Remove diode D25 (3,D) for RXInstall diode in (3,C) for TXVCO in 440 module covers a 20 MHz range - re adjust as needed.220 Band - to expand TX coverage from 216 - 236 MHz:* This mod hasn't been tried and verified. *Install diode (1,C) for TXRemove diode (2,D) - ?144 MHz Band - to expand TX coverage from 138 - 174 MHz:Install diode in (1,C)50 MHz Band - to expand coverage from 40 - 54 MHz:Remove diode D32 (4,B) for RXInstall diode in (4,A) for TX28 MHz Band - to expand coverage from 28 - 40 MHz:Remove diode D33 (3,B) for RXInstall diode in (3,A) for TXMobile extender (cross band link) operation:Install a diode in position (1,A) in the control head.Open the Interface A unit, and look for two switches near where the optional tone and digital squelch boards go.(next to the "option 1" space" Put these two switches in position 2, then reassemble unit.To operate as a crossband link:
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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
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 194 and 195: This modification is read 1499 time
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 212 and 213: 23-11-2001(IC-756pro2) IC-756PRO2 T
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 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 240 and 241: This modification is read 242 times
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Page 244 and 245: 1. You're completely successful.2.
Page 246 and 247: ●●●●●●●●●Für Han
Page 248: 28-03-1999(IC-Q7) Modifying the ICO
Page 252 and 253: ●●●●●●●●Desoldering
Page 254 and 255: You should now have the RF board co
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 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
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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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