On Wed,5/27/2015 10:26 AM, David Anderson wrote:
Unfortunately it looks like this is not going to work out for me, as the level of radiated noise at VHF from both the PX3 severely masks weak signals, there is also a huge radiated birdie from the KX3 near 144.4MHz.
Questions and observations. Questions first. Did you build these units or were they factory assembled? If you built them, dig you carefully scrape all the tape from the interior parts of the chassis where they screw together? Not doing so could be part of the problem. To fix this, you'll have to take it apart and scrape them.
Observation. The KX3 has Pin One Problems at most of the connectors mounted on the left side -- note that only the Mic and Phones jacks are screwed to the chassis. My PX3 is out on loan, and I don't remember whether our not it has the same problem. Any cable connected to a Pin One Problem becomes an antenna to RX and TX any trash.
Common mode chokes are the band-aid for Pin One Problems. For 2M, the weapon of choice is one or more Fair-Rite #43 clamp-ons added to the offending cables. Also, the KX3 chassis should be bonded (short, fat copper) to the PX3 chassis.
No guarantee that these measures will fix your issue, but I would try them before giving up. Also, contact Elecraft support and get them engaged. They talk do lots of people, and chances are they've seen this before and may know of a fix.
See my website for the tutorials about "The Pin One Problem." 73, Jim K9YC ______________________________________________________________ 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]
