Hi Dave, Still have those old synthesizers laying around. I would start there and putt the old ones back in. That will also force you to disconnect and reconnect those infamous TMP coax connections.
It is a place to start while Elecraft works you through the cue. 73, Bill-AK5X, K3 SN 00069 > On Mar 1, 2021, at 2:20 PM, Dave <dave.g4...@gmail.com> wrote: > > My old K3 (serial #80) with dual RX and KSYN3A upgrade synths, has > developed a fault. > > A “tune up” carrier, CW transmission, AM transmission, all exhibit 100Hz > “modulation” with spurious carriers every 100Hz each side of the centre > frequency. They start around 10dB down and drop off in a similar manner to > SSB IMD products. Receive sounds fine. > > The issue is not always present when the K3 is cold, it is not related to > external connections (removed all except power), nor to a power supply > (swapped it and the power lead). It is also present on low power and on all > bands. > > I’ve asked Elecraft Support, no reply so far. Any ideas as to what might be > the problem? > > Thanks > Dave G4AON > -- > Sent from my iPhone SE > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to a...@me.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
