Modifications for the ICOM - RogerK

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Mehr Dynamik in der Modulation bekommt man durch Einstellen des kleinen Widerstandstrimmer, direkt hinter der Frontwand,links, neben dem Quarzfilter auf der Mainunit, oben.Einstellen: Menue, Modulationspegel auf 1, den Buchstaben "A" lange ins Mikrofon sprechen und gleichzeitig den Trimmer aufmaximale HF einstellen. Wenn das HF-Signal abreisst - den Trimmer wieder etwas zurück drehen.Tipp: 3Die Sendeleistung auf HF kann mit dem Trimmer "HF TX power adj." leicht auf 150 W und auf 2 m mit dem Trimmer "144 MHzTX power adj." auf ca. 90 W eingestellt werden. Siehe Seite 63 in der Bedienungsanleitung.This modification is read 3180 times.top of page16-04-2000(IC-706) IC-706, MKII, MKIIG xmit mods - tipAuthor: Emory - KD3DQRef Xmit Mods for 706s shown aboveThe xmit expand mod for the IC-706, MKII, MKIIG require removing very small diodes, these diodes are about the size of a flea,and require the use of very small tools.I have done mods before but these are difficult.After lots of thought I did my mod with an x-acto knife. I needed a magnifing glass and a new blade for the x-acto knife. I cutjust the solder on one side of the tiny diode, making sure that is all I cut, then pushed up on the diode, the other side breaksloose from the board. I cut both diodes this way and it was easy and worked fine.I could not find a soldering iron small enough to fit into tiny space available. Good luck.... Emory KD3DQThis modification is read 4862 times.top of page20-08-2000(IC-706) IC-706 10 watt tune modification/An Icom IC706 Tune TriggerAuthor: Larry Lefczik, WA2EHZ - wa2ehz@netzero.net.MODIFICATION.NET(Some assembly required)The ICOM IC-706 has a nifty feature built in to help the operator tune the HF antenna SWR. By pushing the TUNE button on thefront panel, the radio switches to CW mode and transmits a 10 Watt carrier. This state last for approximately 10 seconds or theoperator can terminate sooner by pushing the button again. This was designed to work with the Icom automatic antenna tuners.There have been a few circuits developed to fool the 706 into thinking there is a Icom tuner attached and produce the sametuning signal which can be used with a manual antenna tuner or many automatic tuners, some get quite complex.Well, being the cheap guy I am, and being one to tinker, I felt there had to be a simple way to do this. I began reading thevarious postings on the Internet. I went back to an e-mail exchange I had with Ed, W1AAZ in early April 1999 on Vartel's ICOM706 Discussion Group. Ed explained the functions of the TKEY and TSTR pins on the "AH-3" connector on the 706.The outcome was a simple RC circuit which I have built right on a Molex connector which plugs into the AH-3 jack on the back ofthe IC706.Construction:The (+) side of C is connected to the 13.8VDC pin. The (-) side connected to TSTR and TKEY which are connected together.Resistor R is in parallel with C. Below is a diagram of the AH4 connector on the back of the IC706 where the < indicates thepointy end of the connector (Pin 1 = TKEY). You can buy the Molex connector at Radio Shack (#274-0224).< TKEY TSTR 13.8V GND ]|_____| || R |+--\/\/\/--+| + |+----)(----+C
Bottom view of connectorNote: I have also used this connector to tap power for "ClearSpeech" DSP speaker. The power cable shown is not part of theTUNE TRIGGER circuit.The values I use are C=1000uF 16WV R=92K Ohms 1/8 Watt which result in 15 seconds of tune time. As you can see, these aretied in parallel. If you want to use a physically smaller capacitor such as 440 uF, you can adjust the time by raising R. Theextreme values I found are:2K
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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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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
Page 129 and 130: Note: a strong signal will be serio
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Page 133 and 134: Dieses ist mit dieser Schaltung als
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Page 137 and 138: X . X . 5.0 KHz 1 0 1 0. . . . X .
Page 139 and 140: Remove the back cover. If you place
Page 141 and 142: 27-10-1998(IC-575) SSB RF GainProbl
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 158 and 159: Operation:Be sure to read the manua
Page 160 and 161: Alternative zum modifizierten PC St
Page 162 and 163: ●●●●●(Another receiver wi
Page 164 and 165: | IC31 uPD4094BG || |1 2 3 4 |5 6 7
Page 166 and 167: This modification is read 411 times
Page 168 and 169: D116 and D118 are responsible for o
Page 170 and 171: Transmit power output after modific
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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 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
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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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