I have the R 390, Bob. Thanks. John, K5PGW
----- Original Message ---- From: rbethman <[email protected]> To: Discussion of AM Radio in the Amateur Service <[email protected]> Sent: Wed, December 2, 2009 12:31:06 PM Subject: Re: [AMRadio] Muting the R390 on transmit The cited References are for the R-390A. John, which is it you have? *IF* it is the R-390A, then the break-in relay *IS* K-601 in the AF Module. Bob - N0DGN Grant Youngman wrote: > On Dec 2, 2009, at 10:46 AM, John King wrote: > > >> Thanks for the source of information, Jerry. I have looked at the schematic >> on the Y2K site and see relay 601, the break in relay. Now I must physically >> locate it and determine if the relay is indeed bad. I have 12.95 vac at >> terminal 9 on the terminal board on rear of R390. >> > > Not sure of the age or condition of your 390, but you might also just try > pulling and reseating P120/J620 on the audio chassis. Among other stuff, > this connector carries the operating voltage to the Break-in relay, K-602. > (K-601 is actually the squelch relay). Both relays just ground the audio out > from the AF amplifier V-601 through the interstage transformer T-601. > > Pins 1 and 2 of P120 carry the control voltage to the relay. You could > measure the voltage there also, to make sure it's getting that far along when > pin 9 of the rear connector strip is grounded. > > > Grant/NQ5T > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/[email protected]/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: [email protected] > To unsubscribe, send an email to [email protected] with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > -- +------------------------------------------------------------------+ | AM Amateur Radio Operator NØDGN | +------------------------------------------------------------------+ | http://home.comcast.net/~rbethman/ | +------------------------------------------------------------------+ | Bob Bethman \\\|/// " The absence of a danger | | \\ ~ ~ // signal does *NOT* mean | | [email protected] (/ @ @ /) that everything is OK " | +----------------------o00o---°(_)°---o00o-------------------------+ ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/[email protected]/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: [email protected] To unsubscribe, send an email to [email protected] with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
