Modifications for the ICOM - RogerK

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Alternative zum modifizierten PC Stecker:Steckergehäuse Molex 03-09-2041, Best.Nr. 143-207, ca. DM 0,40Chrimp-Kontakte 02-09-2118, 143-219, ca. DM 12,- (gibt es nur in Beutel = 100 St.)Fa. Farnell, Grünwalder Weg 3082041 Deisenhofen.oderOriginal ICOM Kabel für AH-3 oder AH-4zum Preis von ca. DM 80,00Bild 1 StromlaufplanAusschneidenBild 2 PC-Stecker Bild 3 Layout ( vergrössert )Bild 4 LochrasterplatineBild 5 Lochrasterplatine LötseiteThis modification is read 3018 times.top of page
26-06-2001(IC-706) FM Transmit FixAuthor: Adam MAURER, VK4CP - vk4cp@bigpond.com.MODIFICATION.NET(This article appeared in "Six News" Issue 59 and "Radio & Communications" April 1999)Is your 706 not transmitting on FM properly? This maybe why…Having taken my Icom IC-706 back for service twice before for the same fault, I was not prepared to be inconvenienced a thirdtime! As it turns out IC-706s all over the World have been exhibiting the same fault. I’ve had e-mail from other unhappy IC-706owners as far away as the U.S.A. and the U.K.Upon checking the previous Fault Reports I noticed that the FM VCO had been tweaked.Hmmm… There is a 9MHz VCO active during FM mode only which is modulated from the mic amp.Fault condition symptoms are;●●●Very low Output power (enough to be heard on a nearby receiver on the shack bench but that's about it).Carrier frequency is NOT what the dial indicates, typically 5 - 30kHz on the low side.Carrier tends to wander and sounds spurious.The culpritI discovered that C267 a miniature SMT trimmer capacitor located – see picture - 9mm to the right of the 9.0115 MHz IF Filteron the Main Unit was not re-flowed to the PCB to a satisfactory standard. There was insufficient solder paste applied during theprinting process and the end result being a poor solder joint and an intermittent 9MHz VCO. After re-touching both pins of C267with fresh solder it's performed faultlessly since.Although access to the offending area is easy you will need a very fine tip on your iron to get to the trimmer pin on the filter sidewithout damaging the capacitor itself and disturbing two nearby 0603 chip capacitors.I cannot stress enough to successfully carry this repair out you need a very very fine tipped soldering iron, and ensure the tip isin good order.Equipment RequiredYou’ll require the following tools;●●Small Phillips-head screwdriver.Accurate Frequency Counter.
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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
Page 109 and 110: 19-07-1998(IC-3200) Fix for IC-3200
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Page 117 and 118: One note on the above - the BNC con
Page 119 and 120: e shorted to ground and cause PLL u
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Page 127 and 128: Problem:This is a general transceiv
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Page 139 and 140: Remove the back cover. If you place
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Page 143 and 144: 26-06-2001(IC-575) Pass band Tuning
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
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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 184 and 185: 19-07-1998(IC-736) Icom IC-736 DDS/
Page 186 and 187: Also probably would apply to IC 735
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Page 190 and 191: John Schmitz NS8EAdditional informa
Page 192 and 193: 13-01-2002(IC-746) Monitor Audio Ou
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Page 198 and 199: inspect your job to be sure that th
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Page 202 and 203: Step 8: Turn the radio off and inst
Page 204 and 205: To be neater you could remove the s
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Page 208 and 209: 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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