Last February, I purchased a factory assembled K3S including a 1 ppm TCXO. The transceiver is serial number 11803 and the firmware was updated on May 5th of this year.
Last July, I noticed that many of the signals on 50.125 MHz sounded as if they were a bit off frequency as they were higher pitched. This led me to believe that the reference oscillator may have drifted, possibly due to crystal aging. Subsequently, I used method 2 and WWV, as described on page 53 of the Elecraft K3S manual. The REF CAL frequency was lowered from 49.999.996 to 49.379.448. That seemed to make the signals on the 6 meter calling frequency sound like they should. A few days ago, I caught a six meter opening and signals on 50.125 sounded higher pitched again. I repeated the reference oscillator calibration again, using method 2. Now, the REF CAL frequency is set to 49.379.110. I have not had the opportunity to hear any six meter signals, since I changed the reference oscillator. I am wondering if the REF CAL frequency change that I have seen in less than a year is normal, or whether I have a TCXO problem. Any thoughts would be most appreciated. Thanks in advance for any time taken to reply. Gary, K0CX Rapid City, SD ______________________________________________________________ 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]
