My aging K2 (#2198) has developed a curious symptom in that the 4 MHz oscillator cannot be adjusted lower than about 4,000,000.55 kHz. It has probably been like this for a while and my BFO settings have probably been done with the incorrect reference. I discovered it by observing that the indicated frequency was about 0.75 kHz off.
Questions to the group: 1. Has anybody experienced anything like this, and can it be blamed on aging of e.g. the crystal or on some of the capacitors in the circuit? (BTW I have the KI6WX mod of the oscillator circuit http://mailman.qth.net/pipermail/elecraft/2003-August/022687.html which has worked well before) 2. How can I do a quick fix? e.g. by reinstalling C21=33 pF instead of the 10 pF of the mod above - or some other idea for a fix? 73 Sverre ----- Sverre, LA3ZA K2 #2198, K3 #3391, LA3ZA Blog: http://la3za.blogspot.com, LA3ZA Unofficial Guide to K2 modifications: http://la3za.blogspot.com/p/la3za-unofficial-guide-to-elecraft-k2.html -- View this message in context: http://elecraft.365791.n2.nabble.com/4-MHz-oscillator-is-too-high-in-frequency-K2-tp7587585.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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]
