I would try putting something around the oscillator (Styrofoamm etc)
________________________________ From: "kj...@kj7rt.com" <kj...@kj7rt.com> To: Elecraft@mailman.qth.net Sent: Thursday, May 22, 2014 10:31 AM Subject: [Elecraft] XG50 - Frequency Instability I am trying to use my XG50 to run the Extended Temperature Compensation Procedure on my KX3. This is the first time I have attempted to use the XG50 since building it. I have completed the 8 hour burn-in. When I first connect the XG-50 to my HP frequency counter, I get a reading of something like 49.379990. Then after running for several minutes it starts dropping in frequency to something more like 49.32xxxx. It is still wildly fluctuating. If I connect the 10MHz output of my Trimble Thunderbolt GPSDO to the counter it stays quite stable just below 10 MHz. I re-soldered all the XG50 components and tried with both a metered home-brew power supply and a 12v SLA battery with the same result although re-soldering made a significant but not permanent improvement. My lab is in my photographic darkroom which has an ambient temperature of about 68 degrees F and the AC does blow across the work area. Thanks, Gary Marklund KJ7RT Sun City, AZ USA ______________________________________________________________ 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 hlyin...@yahoo.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
