Hi Glen, No, not really, only the early Amphenol connectors were made like this, so you can change a pin quite easily. But not on the later ones...
73, Jacques, VE2JFE in Montreal -----Message d'origine----- De : [email protected] <[email protected]> De la part de Glenn Little WB4UIV via R-390 Envoyé : 13 juin 2026 18:36 À : [email protected] Objet : Re: [R-390] R-390 IF: Looking for 20-pin socket and plug Look at the back of the connector. The pins may be held in with a small clip. If so you can replace the bad pin from a donor without changing the entire connector. 73 Glenn WB4UIV On 6/12/2026 1:52 PM, n4buq via R-390 wrote: > Here’s a picture. > > Thanks, > Barry > > >> On Jun 12, 2026, at 12:48 PM, Barry via R-390<[email protected]> wrote: >> >> I have a 20-pin female connector that I believe was for an R390A. I >> presume that's the same as for the R390 but I don't know that for sure. >> Unfortunately, I don't have the male chassis mount part. >> >> Let me know if you think you can use it. >> >> 73, >> Barry - N4BUQ >> >>> Everything has been going well on restoring my R-390, until I >>> noticed no AGC voltage. Then I unplugged the 20-pin connector. Lo >>> and behold, pin 15 had corroded right off (the AGC line)! The >>> mating plug has severe pitting and a thick black oxide replaced what >>> was once gold plating. But underneath, everything is pristine. I am going >>> to have to replace the pair. >>> >>> A parts radio might yield them. I would happily buy them. An >>> extender cable would have this pair. >>> >>> Interestingly, the Antenna Box BNC jacks were destroyed by pitting, >>> but I re-built that without thinking beyond it. This reminded my of >>> the circuit breakers in a plant that made sulfuric acid. Not only >>> did the breakers fail every few months, but the panels would grow >>> long silver whiskers. So there was something in the environment of that >>> radio... ? >>> >>> Thank you, >>> WN9i Fred >>> >>> ______________________________________________________________ >>> R-390 mailing list >>> Home:http://mailman.qth.net/mailman/listinfo/r-390 >>> Help:http://mailman.qth.net/mmfaq.htm >>> Post:mailto:[email protected] >>> >>> This list hosted by:http://www.qsl.net Please help support this >>> email list:http://www.qsl.net/donate.html >> ______________________________________________________________ >> R-390 mailing list >> Home:http://mailman.qth.net/mailman/listinfo/r-390 >> Help:http://mailman.qth.net/mmfaq.htm >> Post:mailto:[email protected] >> >> This list hosted by:http://www.qsl.net Please help support this email >> list:http://www.qsl.net/donate.html >> >> ______________________________________________________________ >> R-390 mailing list >> Home:http://mailman.qth.net/mailman/listinfo/r-390 >> Help:http://mailman.qth.net/mmfaq.htm >> Post:mailto:[email protected] >> >> This list hosted by:http://www.qsl.net Please help support this email >> list:http://www.qsl.net/donate.html -- ----------------------------------------------------------------------- Glenn Little ARRL Technical Specialist QCWA LM 28417 Amateur Callsign: [email protected] AMSAT LM 2178 QTH: Goose Creek, SC USA (EM92xx) USSVI, FRA, NRA-LM ARRL TAPR "It is not the class of license that the Amateur holds but the class of the Amateur that holds the license" ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ R-390 mailing list Home: http://mailman.qth.net/mailman/listinfo/r-390 Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
