Dear all, just an update..the Microham Microkeyer II has definitely a problem with RF! I replaced the Microkeyer with a homebrew USB and soundcard interface (Built in 2008) and made new cable distribution box..And the problems are gone.
I have S-NO 280 on the microkeyer..hope the newer ones are better. But definitely not my kind of solution for that cost! 73s Bernie DL5RDP -----Ursprüngliche Nachricht----- Von: Joe Subich, W4TV [mailto:[email protected]] Gesendet: Freitag, 12. Februar 2016 14:15 An: [email protected] Betreff: Re: [Elecraft] Microham Microkeyer II, RFI in mike with my K3 > As I recall, I used pin 7 for the mic ground and pin 8 for the PTT > ground. In a brief test it worked ok into a dummy load. Is this not > correct? That is correct although with the K3/K3S since the Elecraft mic RFI change it should not matter (both pin 7 and pin 8 are connected to the "ground" foil on the front panel circuit board). Early K3 front panels included an RF choke in the mic *and* PTT returns which made the "pin 1 problem" much worse. With the RF choke removed (bypassed) the issue is significantly reduced but there may still be a problem if the overall station installation has any "RF on the coax." 73, ... Joe, W4TV On 2/12/2016 7:59 AM, [email protected] wrote: > This week I wired rewired my MicroHAM Micro2R cables for K3S's. As I > recall, I used pin 7 for the mic ground and pin 8 for the PTT ground. In a > brief test it worked ok into a dummy load. Is this not correct? > > John KK9A > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft 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 Message delivered to [email protected]
