After 9 months of ageing my K3 # 604, I ran a cold to hot Reference Oscillator Test.
My Reference Oscillator is the Optional 1ppm Temp Compensated Crystal Oscillator (KTCXO3-1). This TCXO came with a Factory calibration data sheet which shows frequency verses temperature over a wide range. My Ambient Room Temperature was 72 deg F up to 74 deg F. At turn on (cold) the Reference was adjusted to WWV (15Mhz) and it measured: 49,379,924 Mhz. After 5 min it measured: 49,379,925 Mhz. After 10 min it measured: 49,379,925 Mhz. After 15 min it measured: 49,379,926 Mhz. After 20 min it measured 49,379,928 Mhz. That is an 4Hz shift up in Reference frequency. For the next 14 hours it measured: 49,379,928 Mhz. It looks like it will stay there as long as the Ambient Room Temperature remains near 74 deg F. This is Very impressive and will (can you believe it) get even better when Elecraft enables the 1ppm TCXO Option in Firm Ware. This will (for all practical purposes) eliminate the errors due to temperature changes. The more I use my K3 and the more I learn about it the more I like it. This is a very exciting and satisfying radio. Thanks Elecraft. 73's Ron Durie [email protected] _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
