Hi Chuck & Garey, A point well-made, Garey...
I had a similar such event occur here once with an old Heathkit HW-12A monoband transceiver...it employed an internal open-framed T/R relay, and after due application (several times) of isopropyl alcohol via a pre-wetted paper matchstick, it was good to go again. ~73~ Eddy VE3CUI - VE3XZ **************************************** ----- Original Message ----- From: "Garey Barrell" <[EMAIL PROTECTED]> To: "Drakelist" <[email protected]> Sent: Saturday, September 27, 2008 11:35 AM Subject: Re: [Drakelist] receiver loses signal after keying transmitter > Chuck - > > Clean the relay contacts in the T-4X. Wet a piece of good paper with > DeoxIT, (or alcohol,) slip it between the contacts and close them with > your finger and draw the paper out. If that doesn't clear it, let us know! > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs > <www.k4oah.com> > > > > Chuck Grandgent wrote: > > OK, here's one... > > > > This has happened intermittently before, but now seems to be happening > > more consistently. > > > > T4X / R4A - turn them both on, R4A working fine, good signal strength. > > Key the transmitter (key or mic), after which signals disappear in the > > R4A. You can just about hear them down in the mud, but essentially gone. > > > > Doesn't make a difference whether transceive set to RX or TX or Separate. > > Nor doesn't make a difference whether set to external mute or not. > > > > One time it happened, I keyed the mic for a second, and the RX was OK > > again. > > Now doing that isn't helping. > > > > For a few times I thought the band was disappearing on me, but now I > > know that's not it. > > > > Guess I'll dig out the T4X schematic and check that switching. > > > > Chuck, K1OM > > > > > > _______________________________________________ > Drakelist mailing list > [email protected] > http://mailman.zerobeat.net/mailman/listinfo/drakelist _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
