A common problem with that series of radios, and indeed most handhelds of that vintage, was the PTT switch going flaky. I'd bet it's bad. Got a spkr-mic that you can try? If the sp/mic sounds ok, it's the switch. Of course, the sp/mic jacks could be bad too, so if it sounds bad, it doesn't really prove anything.
---- Jim --- In [email protected], Mike WA6ILQ <[EMAIL PROTECTED]> wrote: > At 06:17 PM 10/12/04, you wrote: > > > >Time to ask the guys who know... > > > >My old faithful Icom IC-4AT is experiencing intermittent TX. Sometimes the > >TX just cuts out, sometimes there's lots of crackling on the transmitted > >signal. This is an old HT - the one with thumbwheel frequency select. Looks > >like Icom wants $75/hr. repair rate. I can't believe the thing is worth $75. > > > >Can anyone suggest something more economical or is it time to say goodbye to > >my old and trusted friend? I just don't have the time, patience and eyesight > >to tackle an HT repair. > > > >Reply directly, please > >[EMAIL PROTECTED] > > > >Chuck > >WB2EDV > > Find someone with good eyes or one of those clamp-on-the-desk > work lights that has a 4" diameter magnifying glasses that is > mounted inside a circular florescent tube. > > Then closely inspect the connection between the center pin of > the BNC and the PC board. I'll bet you that it's broken and > making intermittent contact. Get in there with a fine soldering > tip and remove the broken jumper wire and excess solder then > make up a jumper using tiny braid - I use the really fine > solder-wick. I put a blob of solder in the BNC pin and on the > PC board and then QUICKLY tap the braid into each blob. > The intent is to have the solder-wick braid be a flexible > connection allowing the BNC center pin to move a little as > you insert and remove the antenna. > > Mike WA6ILQ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
