Date: Sun, 19 Apr 1998 19:14:22 -0400 From: Jay Martin To: Carl Morgan CC: icom@qth.net Subject: Re: [Icom] IC-2350 Carl Morgan wrote: > > Anyone familiar with this transceiver that might comment on a couple of > issues. > > 1) Is this transceiver capable of cross-band repeat? If so, how is it > initiated and terminated? > > 2) When keyed, after a period of inactivity, the UHF RX is immediately > muted; however, there is a noticeable time lag between keying PTT and TX > output on the UHF radio. Subsequent keying results in immediate output ... > only the initial key up has a delay. > > Any thoughts? > > 73 <> Carl > K8CM > =========================================================================== I have a 2350H and cannot comment on the crossband repeat but i can comment on the tx problem. Mine has never done this at all so i would have to say that there is a problem with the radio. I have never experienced a delay on the 440 side between the PTT and the band keying up. Hope this helps! contact me if you have any other questions. --- Date: Wed, 27 May 1998 11:18:06 -0700 From: Randy Starace To: Robert L Weaver , "icom@qth.net" Subject: Re: [Icom] Icom IC2340H Hi Robert It might need an output module. Does it receive ok? Let me know Randy Robert L Weaver wrote: > I have a Icom IC2340H Dual band mobile radio and recently I can't seem > to get the 440 side to work at all. I have tried to reset the cpu but > that didn't help. Does anyone have any suggestions? > > Thanks > Robert Weaver > KF4KED Randy Starace KK7TV Communications Factory authorized repair facility for: ICOM YAESU KENWOOD ALINCO http://www.kk7tv.com =========================================================================== To: csuther@plessey.com Date: Thu, 14 Jan 1999 15:58:41 MST Subject: Re: [Icom] IC 2410H cross-repeat On Thu, 14 Jan 1999 09:48:38 +0200 Clint Sutherland writes: > >I have a IC2410H radio. >This particular radio is suppose to do the 'cross-repeat' function, >by simply pressing the 'SET' button for a couple of seconds together with the 'BAND' button. >But my radio doesn't respond to this action. Is there some kind of mod >I can do to rectify this ? Hi Clint I just went out and tried this on my radio and it works fine. The radio was in the normal mode on both bands. I press both boths simultaneously and in about 2 seconds the L starts flashing on both sides of the display. I also have the extended receive diode clipped on the radio. Don't know what else to tell you but it does work as you think it should.. Good luck - maybe it's something simple.. Jim Baremore K5QQ ___________________________________________________________________ Date: Thu, 11 Nov 1999 12:25:30 +0100 From: Christoph Hennes To: icom@qth.net Subject: Re: [Icom] Modification After you open the top cover you can look after the backside from the display. I think you can look only through a small "window" in the bracket. But what you can see is enough to go inside with a small cutter and cut the diodes. If you cut only them you don't need to remove the bracket from the display to get inside with a = soldering iron. Hope this helps, Christoph KC8CSD@aol.com schrieb: > Hello all, I have a 2350h that needs the transmit/receive mod done to it. > Anyone able to pinpoint where the diodes are that need to be removed? I have 2 different instructions for doing it, but neither one shows where these > parts are located. Any help would be greatly appreciated. > > 73, > Sean-KC8CSD > > ---- Date: Tue, 30 Nov 1999 19:11:34 -0500 To: icom@qth.net From: Lorand Enterprises LLC Subject: [Icom] IC-2340 Mod for 830-950 MHz RX Has anyone figured this one out yet? I found a page in Japan but the mod (as best I can figure it out) doesn't seem to work. Perhaps someone can read the Japanese text and translate to English? http://www.people.or.jp/~kaz/hamkaiz/ic2340/ic2340.htm Thanks! Andrew N2CBU ======================================================================= Date: Wed, 01 Dec 1999 00:19:54 -0500 From: "Edward A. Behl" To: icom@qth.net Subject: Re: [Icom] IC-2340 Mod for 830-950 MHz RX Andrew - I don't know if it applies to this rig in particular, but many of the FM radios capable of "wideband" Rx have different RF sections between the US and other market versions. This --is-- true for the Yaesu FT-51, for instance. Though it can be set for "DC-daylight," in software config, the US model does not have the RF circuitry to actually support the entire range, so you have a display of a frequency you can't receive (or Tx, for that matter). Best of luck - -- Edward A. Behl - KG4ALG ======================================================================== Date: Wed, 01 Dec 1999 07:21:23 -0500 To: icom@qth.net From: Lorand Enterprises LLC Subject: Re: [Icom] IC-2340 Mod for 830-950 MHz RX At 12:19 AM 12/1/99, "Edward A. Behl" wrote: >Though it can be set for "DC-daylight," in software config, >the US model does not have the RF circuitry to actually support the >entire range, so you have a display of a frequency you can't receive (or >Tx, for that matter). The US version of the IC-2340 does indeed have the necessary RF hardware. The problem is that it you can't "dial it up." The only hardware mod that's necessary is to add a short coax jumper inside the radio and an extra "pigtail" on the back of the radio. The RF "hardware" is almost identical to the IC-2400. The modification on the Japanese web page I referenced seems to be a bit different than what is commonly available on the mod-file ftp sites. Andrew N2CBU ========================================================================== From: "Richard Arter" To: Subject: [Icom] IC-2350H Date: Thu, 24 Feb 2000 23:16:34 -0500 I have an Icom IC-2350H 2m/440 mobile rig. The backlight for the display has burned out on both bands. Anyone had one of these apart? Does it use a regular bulb-type backlight, or some exotic light? How do I get to the backlight? Thanks for your help! 73 de KB8VPA =========================================================================== From: "SM4RNA, Anders" To: "Icom Reflector" Subject: [Icom] The non, switch on Ic2340H Date: Wed, 17 May 2000 00:20:45 +0200 From: "SM4RNA, Anders" Have a problem with my IC-2340H. Every 100'eth or more, time I switch it on, nothing happens. Then, the only way to make it to "wake up" is to remove the fuse, so that the radio get no voltage for a couple of seconds and than switch on again after replaced the fuse. Then it works again for a month or more again. Any ideas, frindes? (The on/off switch is not a real breaker, just soft-switch (if u no what I mean)) /Anders SM4RNA ================================================================================= From: "Phil Atchley" To: Subject: [Icom] Info on IC-2350H Date: Mon, 22 May 2000 01:34:58 -0000 From: "Phil Atchley" Hello All.... I have an IC-2350H that I wanted to do the Mars/Cap mod on. According to the info on the page I downloaded you remove Diodes D9 & D10 for expnaded receive and clip jumper W1 for expanded Tx. I was unable to locate D9 & D10 BUT did locate jumper W1. Clipped the jumper and did a "power on reset". Clipping W1 Did Not appear to give expanded TX (want to use it with search & rescue) BUT I now have the following receive ranges. 118 to 174 MHz (no change) 320 to 479MHz (expanded from 430 to 440MHz) 849 to 950MHz (A new range not present before) It works, I receive 900MHz phones and other local 900MHz activity. Is this typical of the results obtained on this radio? What about expanded tx? Any other info appreciated. 73 de Phil KO6BB =============================================================================== Date: Sun, 30 Jul 2000 12:01:01 -0400 To: icom@qth.net From: Andy Subject: Re: [Icom] Icom IC-2350H Dual Band Mobile FS From: Andy Phil I am looking for dual bander like that. Can I have your phone number to work thinks out. 73 de Andy At 03:04 PM 7/30/00 +0000, you wrote: >From: "Phil Atchley" > >Icom IC-2350H Mobile Dual Band 2m/70cm Transceiver. > >Too many features to list but here are the highlights. > >1. Wideband receive enabled, 118-174, 320-470, 840-950MHz. > Wideband Tx not enabled (I didn't need it), 50W VHF,35W UHF. > >2. Crossband repeat, DTMF mic, 51 VHF Memories, 51 UHF memories > Separate speaker outputs for VHF/UHF, ctcs tones for pl. > Many scan options, microphone chan up/dn. Quite compact for > the newer cars. > >3. This unit has NEVER been mobile, the bracket was still factory > wrapped when I received it, I used the bracket to mount the > radio under my radio shelf where it has remained. > >4. Includes dtmf mic, manual, factory box. > >Unit is in Excellent like new condition and Price is $295.00 Postal >Money Order which includes insured shipping to the lower 48. > >73 de Phil KO6BB ====================================================================== Date: Fri, 11 Aug 2000 05:52:28 -0700 To: ICOM Reflector From: Lewis Stephens (by way of Dick Flanagan) Subject: [Icom] FS: Icom IC-2350H From: Lewis Stephens (by way of Dick Flanagan) FS: Icom IC-2350H IC-2350H 2M/440 MHz Dual Band Mobile Dimensions: 5.5 (W), 1.6 (H), 8.1 (D), 2.6 lb 2 M (50 W) 440 MHz (35 W) Wide Band Rx (118 MHz - 174 MHz) 110 Memory Channels PL Encode Built-in Built-in Duplexer Auto Repeater Shift Seven Scan Modes, including Fast Scan IC-2350H SPECIFICATIONS GENERAL Frequency Coverage: VHF: Transmit: 144.00-148.00 MHz Receive: 118-174* MHz (*guaranteed 144-148) UHF: 440.00-450.00 MHz Mode: FM Number of memory channels: 110 (100 regular, 2 call, 4 scratch pads and 4 scan edges) Antenna Impedance: 50 ohms (nominal) Power Supply Requirement: 13.8 V DC+/-15% (11.5 A) Usable Temperature Range: -10=B0C to +60=B0C; +14=B0F to +140=B0F Frequency stability: Less than =B110 ppm Tuning step increment: 5, 10, 12.5, 15, 20, 25, 30 or 50 kHz Current Drain (at 13.8 V DC): Transmit at high power: 11.5 A (VHF); 11 A (UHF) Receive: 1.2 A (squelched); 1.8 A (max. audio output) Dimensions (projections not included): 140(W) x 40(H) x 204.5(D) mm, 5.5(W) x 1.6(H) x 8.06 (D) in Weight: 1.2 kg; 2.6 lb. TRANSMITTER Output Power: VHF: 50 W, 10 W, 5 W selectable UHF: 35 W, 10 W, 5 W selectable Modulation System: Variable reactance frequency modulation Max. Frequency Deviation: =B15.0 kHz Spurious Emissions: Less than -60 dB Microphone Impedance: 600 ohms RECEIVER Receive System: Double conversion superheterodyne Intermediate Frequencies: VHF: 1st 17.2 MHz; 2nd 455 kHz UHF: 1st 30.85 MHz; 2nd 455 kHz Sensitivity: Less than 0.16 =B5V (typical) for 12 dB SINAD Squelch sensitivity: 0.13 =B5V (at threshold) Spurious and Image Rejection Ratio: More than 60 dB Audio Output Power: More than 2.4 W at 10% distortion with an 8 ohms load. This one is used but never abused (8+ easy). I bought it new four years ago and it has functioned exceptionally well ever since. No mods have been applied $295.00 plus shipping if needed e-mail me at km5bh@swbell.net ============================================================================== From: "J. Setcer" To: References: <000801c00d23$283e6c90$fd9a2581@workgroup.edu> Subject: [Icom] MODS FOR IC 2350 Date: Fri, 6 Oct 2000 21:25:50 -0500 From: "J. Setcer" I can't seem to locate D9 and D10. I see D6 and D7 but the diodes are not in a easy row where I could count from 7 to 9. W1 was easy to find, but all I need is expanded recieve. I have looked at the ttp://www.qrz.com/download/mods-i-k/ic2350.txt and at the www.mods.dk site. The text is identical. Can anyone help with more detailed instructions please? thank you in advance, 73, J. Setcer KC5BRY ============================ MODS FOR IC 2350 On logic board behind the front panel 1. Remove D9 to expand vhf rx 2. Remove D10 to expand uhf rx 3. Cut W1 jumper wire to expand tx on all bands ======================================================================== From: "Jim" To: Subject: Re: [Icom] Transmit audio distortion Date: Thu, 25 Jan 2001 18:26:39 -0800 From: "Jim" Icom has a tendency to set/design the microphone gain to high in its VHF/UHF transceivers. I had to install a 4.7K Ohm resistor in the microphone of my Icom IC-2350H. The IC-2350H has no internal microphone gain control (that I could find). Most don't. I have noticed that many of the operators on 2 meters have WAY to much microphone gain. It makes them sound like junk. In addition, many tend to talk louder while mobile. This is an effort to overcome the road noise. (Natural human tendency) Also, many talk just to close to the microphone. About 2 inches is good. 73 and good luck! Jim W7RY -----Original Message----- From: Sheldon Daitch To: icom@qth.net Date: Thursday, January 25, 2001 5:06 PM Subject: Re: [Icom] Transmit audio distortion >From: "Sheldon Daitch" > >Bud, > >First guess would be that the TX is off frequency. You might want to >check that. > >Sheldon >WA4MZZ > >"Colclough, Bud" wrote: >> >> From: "Colclough, Bud" >> >> Greetings, >> >> I recently purchased a new ICOM 2100H 2 meter mobile transceiver. In >> general the radio seem A-OK with one exception. I have noticed by listening >> to a near by radio and have received over the air reports that the transmit >> audio has considerable noise like distortion. The noise is only there when >> speaking into the microphone, there is no noise without audio going into the >> mic. I wonder if anyone else has had this problem and if it is a general >> characteristic of this radio? >> >> Bud >> K1LC =========================================================================== From: jpk5lad@bigfoot.com To: "Herb Gerhardt, KB7UVC" Date: Sun, 17 Mar 2002 15:06:15 -0600 Subject: Re: [Icom] IC-2340H Problem Herb -- I also have an IC-2340H which is about the same age and it has had exactly the same problem for about a year. Twice, I put it through its paces to try to identify the source of the problem and was even going to send it back to Icom but the problem always cleared (using the same fine ham diagnostic method you used - a good blow to the top). I even got in and tried to find a loose wire or cold solder joint around the UHF volume pot, with no luck. Mine also is only on the UHF side. If I don't mess with it too much, once I hit...... I mean repair it, it stays in the "fixed" or should I say, "working OK" condition...... as it is right now. I use to take if from its place a a base rig to my travel trailer when I wanted a rig in it. Since I stopped traveling with it, mine has stayed.........working.......that is, fixed........ that is tentatively OK (knock wood) for several months. I would very much appreciate any and all comments you get on yours since mine suffers the same malady. Good luck on your (our) search. 73, Jim - K5LAD Owasso, Oklahoma jpk5lad@bigfoot.com On 17 Mar 2002, at 10:07, Herb Gerhardt, KB7UVC wrote: > I own an IC-2340H mobile radio. It has worked fine for the last 7 > years but recently developed an intermittent problem. > > When in dual band mode, the audio goes bonkers when it is receiving a > signal on the UHF band. At time the volume gets real loud and the > volume control knob has no bearing on the volume! At other times the > audio sounds real tinny and very low volume and again the volume > control knob has no bearing on the volume! > > Being an A Number One Troubleshooter, I bang on the radio and the > volume returns back to normal including changing levels vial the > volume control knob. Obviously this is an intermittent problem which > almost sounds like a cold solder joint which surfaced after 7 years of > operation. > > When putting the radio in single band mode on the UHF only mode, the > same problem exists. When putting the radio in VHF only mode, there > is no problem on the VHF side. > > Has anyone ever encountered a problem like this on their IC-2340H? If > so, what did you do to fix it? I would like to fix it myself if at > all possible. > > All suggestions are welcome, > > Herb, KB7UVC > NW APRS Group, West Sound Coordinator > Our WEB Site: www.nwaprs.org ============================================================================ From: jpk5lad@bigfoot.com To: "Herb Gerhardt" Date: Thu, 21 Mar 2002 22:34:02 -0600 Subject: RE: IC-2340H On 21 Mar 2002, at 19:50, Herb Gerhardt wrote: > Jim, > > Unfortunately your reply was the only one I received. > > I will keep your request on file and if I figure out what the problem > is, I will let you know. Would appreciate if you do the same. > > Thanks, > Herb Hmmmmm Bummer! Surely we're not the only ones seeing this problem. Oh, well........ thanks for the response. I'll let you know if I find anything. Jim - K5LAD > > -----Original Message----- > > From: jpk5lad@bigfoot.com [mailto:jpk5lad@bigfoot.com] > > Sent: Wednesday, March 20, 2002 9:48 AM > > To: Herb Gerhardt, KB7UVC > > Subject: IC-2340H > > > > > > Herb -- > > I didn't hear anything from you..... did you get my comment on the > > IC- 2340H? Did you hear anything from anyone else? > > > > Jim - K5LAD =========================================================================== From: "Herb Gerhardt" To: Subject: ICOM 2340 Problem Date: Thu, 3 Oct 2002 18:48:05 -0700 Since Bigfoot is not accepting anymore messages for you since your box is full. I found this address via QRZ and your web page. Jim, I have my problem fixed. I took it in to have Kuni an ex ICOM employee fix it. It cost me $55. He knew about this problem and ICOM has a mod out to fix it. The mod cost $15 and $40 for labor. The mod replaced the hard circuit board with a ribbon cable which is flexible. Looks to me like the problem was caused by pressing the POWER button on and off. This made for an intermittent at a plug on this board. The VHF side also had a broken solder joint. He fixed it all and it works great. His web site is: www.w7jv.com You might be able to fix it yourself by taking the head off. It unplugs from the rest of the radio. At that point you have pretty good access to the damaged/loose circuit boards. Good luck, Herb, KB7UVC NW APRS Group, West Sound Coordinator Our WEB Site: www.nwaprs.org > -----Original Message----- > From: Herb Gerhardt [mailto:hgerhardt@charter.net] > Sent: Friday, July 12, 2002 8:33 PM > To: jpk5lad@bigfoot.com > Subject: RE: [Icom] IC-2340H Problem > > > Jim, > > Have you figured out anything about our 2340H problem yet? > > Mine just got worse. I now have the problem on both bands. > Neither volume control now works. The audio is loud and garbled. > Banging on it does not seem to help. It still transmits OK. > > No, I have not done anything about it yet but maybe I will have > to open it up and at least do a visual. > > The one thing I am thinking about is that maybe I overloaded the > front end. My problem began shortly after I mounted a second > VHF/UHF antenna on my roof. I have two radios on most of the > time, maybe when one transmits it overpowered the input signal of > the 2340H and blew something. I have had similar problems with > HT's where I had an HT in close proximity to a mobile antenna and > it wound up blowing the front end of the HT. This caused the HT > to not hear well but work OK in every other respect. In my case > the 2340H still seems to hear well so, I don't think that is the problem. > > When your problem started, did you have two antennas in close > proximity to each other during transmission of the other radio? > > Also note my new email address. > > Herb, KB7UVC > NW APRS Group, West Sound Coordinator > Our WEB Site: www.nwaprs.org > > > > -----Original Message----- > > From: jpk5lad@bigfoot.com [mailto:jpk5lad@bigfoot.com] > > Sent: Sunday, March 17, 2002 1:06 PM > > To: Herb Gerhardt, KB7UVC > > Subject: Re: [Icom] IC-2340H Problem > > > > > > Herb -- > > I also have an IC-2340H which is about the same age and it has > > had exactly the same problem for about a year. Twice, I put it > > through its paces to try to identify the source of the problem and > > was even going to send it back to Icom but the problem always > > cleared (using the same fine ham diagnostic method you used - a > > good blow to the top). > > I even got in and tried to find a loose wire or cold solder > joint around > > the UHF volume pot, with no luck. Mine also is only on the UHF > > side. > > > > If I don't mess with it too much, once I hit...... I mean repair > > it, it stays > > in the "fixed" or should I say, "working OK" condition...... as > > it is right > > now. I use to take if from its place a a base rig to my travel trailer > > when I wanted a rig in it. Since I stopped traveling with it, mine has > > stayed.........working.......that is, fixed........ that is > > tentatively OK > > (knock wood) for several months. > > > > I would very much appreciate any and all comments you get on > > yours since mine suffers the same malady. Good luck on your (our) > > search. > > > > 73, > > Jim - K5LAD > > Owasso, Oklahoma > > jpk5lad@bigfoot.com > > > > > > > > On 17 Mar 2002, at 10:07, Herb Gerhardt, KB7UVC wrote: > > > > > I own an IC-2340H mobile radio. It has worked fine for the last 7 > > > years but recently developed an intermittent problem. > > > > > > When in dual band mode, the audio goes bonkers when it is receiving a > > > signal on the UHF band. At time the volume gets real loud and the > > > volume control knob has no bearing on the volume! At other times the > > > audio sounds real tinny and very low volume and again the volume > > > control knob has no bearing on the volume! > > > > > > Being an A Number One Troubleshooter, I bang on the radio and the > > > volume returns back to normal including changing levels vial the > > > volume control knob. Obviously this is an intermittent problem which > > > almost sounds like a cold solder joint which surfaced after 7 years of > > > operation. > > > > > > When putting the radio in single band mode on the UHF only mode, the > > > same problem exists. When putting the radio in VHF only mode, there > > > is no problem on the VHF side. > > > > > > Has anyone ever encountered a problem like this on their IC-2340H? If > > > so, what did you do to fix it? I would like to fix it myself if at > > > all possible. > > > > > > All suggestions are welcome, > > > > > > Herb, KB7UVC > > > NW APRS Group, West Sound Coordinator > > > Our WEB Site: www.nwaprs.org ============================================================================== From: jpk5lad@cox.net To: Date: Thu, 3 Oct 2002 21:57:47 -0500 Subject: Re: ICOM 2340 Problem Hey congratulations Herb -- I accidently deleted your previous message and didn't have a return address. I'm very glad you kept after me. Mine was acting up several months ago and I was going to tear into it and it mysteriously cleared up. It's been normal (and I use that word carefully) since that time. With the information you provided I will put it on the "pretty soon" project list and see if I can locate the problems you mentioned. Again, I sure appreciate your follow up with me and the info. Perhaps we'll run across each other on the air sometime. 73, Jim On 3 Oct 2002, at 18:48, Herb Gerhardt wrote: > Since Bigfoot is not accepting anymore messages for you since your box > is full. I found this address via QRZ and your web page. > > Jim, > > I have my problem fixed. I took it in to have Kuni an ex ICOM > employee fix it. It cost me $55. > > He knew about this problem and ICOM has a mod out to fix it. The mod > cost $15 and $40 for labor. The mod replaced the hard circuit board > with a ribbon cable which is flexible. Looks to me like the problem > was caused by pressing the POWER button on and off. This made for an > intermittent at a plug on this board. The VHF side also had a broken > solder joint. > > He fixed it all and it works great. > > His web site is: www.w7jv.com > > You might be able to fix it yourself by taking the head off. It > unplugs from the rest of the radio. At that point you have pretty > good access to the damaged/loose circuit boards. > > Good luck, > > Herb, KB7UVC > NW APRS Group, West Sound Coordinator > Our WEB Site: www.nwaprs.org > > > > -----Original Message----- > > From: Herb Gerhardt [mailto:hgerhardt@charter.net] > > Sent: Friday, July 12, 2002 8:33 PM > > To: jpk5lad@bigfoot.com > > Subject: RE: [Icom] IC-2340H Problem > > > > > > Jim, > > > > Have you figured out anything about our 2340H problem yet? > > > > Mine just got worse. I now have the problem on both bands. > > Neither volume control now works. The audio is loud and garbled. > > Banging on it does not seem to help. It still transmits OK. > > > > No, I have not done anything about it yet but maybe I will have to > > open it up and at least do a visual. > > > > The one thing I am thinking about is that maybe I overloaded the > > front end. My problem began shortly after I mounted a second > > VHF/UHF antenna on my roof. I have two radios on most of the time, > > maybe when one transmits it overpowered the input signal of the > > 2340H and blew something. I have had similar problems with HT's > > where I had an HT in close proximity to a mobile antenna and it > > wound up blowing the front end of the HT. This caused the HT to not > > hear well but work OK in every other respect. In my case the 2340H > > still seems to hear well so, I don't think that is the problem. > > > > When your problem started, did you have two antennas in close > > proximity to each other during transmission of the other radio? > > > > Also note my new email address. > > > > Herb, KB7UVC > > NW APRS Group, West Sound Coordinator > > Our WEB Site: www.nwaprs.org > > > > > > > -----Original Message----- > > > From: jpk5lad@bigfoot.com [mailto:jpk5lad@bigfoot.com] > > > Sent: Sunday, March 17, 2002 1:06 PM > > > To: Herb Gerhardt, KB7UVC > > > Subject: Re: [Icom] IC-2340H Problem > > > > > > > > > Herb -- > > > I also have an IC-2340H which is about the same age and it has had > > > exactly the same problem for about a year. Twice, I put it > > > through its paces to try to identify the source of the problem and > > > was even going to send it back to Icom but the problem always > > > cleared (using the same fine ham diagnostic method you used - a > > > good blow to the top). I even got in and tried to find a loose > > > wire or cold solder > > joint around > > > the UHF volume pot, with no luck. Mine also is only on the UHF > > > side. > > > > > > If I don't mess with it too much, once I hit...... I mean repair > > > it, it stays in the "fixed" or should I say, "working OK" > > > condition...... as it is right now. I use to take if from its > > > place a a base rig to my travel trailer when I wanted a rig in it. > > > Since I stopped traveling with it, mine has > > > stayed.........working.......that is, fixed........ that is > > > tentatively OK (knock wood) for several months. > > > > > > I would very much appreciate any and all comments you get on > > > yours since mine suffers the same malady. Good luck on your (our) > > > search. > > > > > > 73, > > > Jim - K5LAD > > > Owasso, Oklahoma > > > jpk5lad@bigfoot.com > > > > > > > > > > > > On 17 Mar 2002, at 10:07, Herb Gerhardt, KB7UVC wrote: > > > > > > > I own an IC-2340H mobile radio. It has worked fine for the last > > > > 7 years but recently developed an intermittent problem. > > > > > > > > When in dual band mode, the audio goes bonkers when it is > > > > receiving a signal on the UHF band. At time the volume gets > > > > real loud and the volume control knob has no bearing on the > > > > volume! At other times the audio sounds real tinny and very low > > > > volume and again the volume control knob has no bearing on the > > > > volume! > > > > > > > > Being an A Number One Troubleshooter, I bang on the radio and > > > > the volume returns back to normal including changing levels vial > > > > the volume control knob. Obviously this is an intermittent > > > > problem which almost sounds like a cold solder joint which > > > > surfaced after 7 years of operation. > > > > > > > > When putting the radio in single band mode on the UHF only mode, > > > > the same problem exists. When putting the radio in VHF only > > > > mode, there is no problem on the VHF side. > > > > > > > > Has anyone ever encountered a problem like this on their > > > > IC-2340H? If so, what did you do to fix it? I would like to > > > > fix it myself if at all possible. > > > > > > > > All suggestions are welcome, > > > > > > > > Herb, KB7UVC =========================================================================== From: Matthew Jenkins Subject: Re: [Icom] ic 2350H To: icom@mailman.qth.net You press the main-sub and the main-sub on both VFO and at the same time press set-lock and that should do it. Matthew kg4ipx ----- Original Message ----- From: "Loren James" To: "Icom Group" Sent: Thursday, April 03, 2003 6:29 PM Subject: [Icom] ic 2350H Does anyone know how to place the 2350 into cross band repeat? I have been unable to find this in the manual -and I believe this radio does this. ANY help appreciated. N2LSJ thanks ======================================================================== Date: Thu, 21 Aug 2003 20:18:11 -0700 From: pdovetonsils@hayseed.net To: K5LAD@arrl.net Subject: [Icom] IC-2720H PTT circuit?] From: "William J. Diamond" > Date: 2003/08/05 Tue AM 01:53:20 EDT > To: > Subject: RE: [Icom] IC-2720H PTT circuit? > > Pin 4 to pin 7 will key the rig. > > William J. Diamond > Rogers, Arkansas USA > wjdiamond@sbcglobal.net > > Ham Radio Operator WRØT > Please Visit My Icom Radio Page At > http://pages.sbcglobal.net/wjdiamond/index.html > > -----Original Message----- > From: icom-admin@mailman.qth.net [mailto:icom-admin@mailman.qth.net]On > Behalf Of Paul Lufkin > Sent: Tuesday, August 05, 2003 2:47 AM > To: icom@mailman.qth.net > Subject: [Icom] IC-2720H PTT circuit? > > > My apologies if this question has been asked before... > > I'd like to use a stereo headset and microphone combo with an ICOM IC-2720H > when I set up as a base station during emergency/disaster operations. > > I've already made an adapter to join the audio outputs into a stereo plug > for the headphones. > > Does anyone know how to activate the PTT at the microphone jack? Ground it? > Pull it high? Connect it to something else? > > Pin-out at the microphone connector is: > > 1 +8 V DC output (Max. 10 mA) > 2 Channel up/down > 3 8 V control IN > 4 PTT > 5 GND (microphone ground) > 6 MIC (microphone input) > 7 GND > 8 Data IN > > I'm assuming that the mike should be connected to the mike input at all time > and activating PTT also enables the microphone input, but if you know > otherwise, please correct me. > > (BTW, given the previous discussion about getting service manuals, I haven't > tried that route yet...) > > I understand that the "smart" speaker-mikes like the HM-133 by-pass the > wired PTT circuit and use a digital scheme, but the simpler HM-118 does use > it. > > As an alternative, does anyone have the schematic for a HM-118? > > Thanks in advance for your assistance. > > Paul Lufkin, K6PML Email: K6PML@arrl.net =========================================================================== From: "Herb Gerhardt" To: I have an ICOM IC-2340H Mobile dual band radio that I did some "repair" work on. Yes, you guessed it, I ruined one of the printed circuit boards and ICOM no longer carries that board. It is the one that the VHF control knobs are mounted to. It is P/N B4102. At least that is the number on the printed circuit board. I was attempting to replace the VHF Volume pot (R1). If anyone has an old basket case IC-2340H and wants to part with that board or the entire head or the entire non-working radio at a cheap price, please let me know. Sure would hate to have to scrap this radio for such a minor problem. Thanks, Herb, KB7UVC =============================================================================== To: icom@mailman.qth.net From: Gary Fiber Subject: Re: [Icom] Wanted IC-2340H Basket-Case Herb, If I remember correctly that board was replaced with a flexible board which was as much of a ribbon cable as circuit board. The " new " board was an update and Icom might have those. Also wondering if at least one solder pad remains you might be able to " hardwire" the pot to the board. Scott Malcom might have a board an Kuni Okuma of Comtek. Not sure if Cliff at AVVid would have it. All might have a bones unit to swipe the board from to. Gary K8IZ