[Elecraft] K2 frequency drift

[Kevin Schmidt]

Adam,

The K2 PLL Ref Upgrade manual gives some information on typical drift i.e.
5 to 20 Hz per 15 degrees F on 20 meters. It also explains how changing RA
on the thermistor board can better compensate for the drift.  Since your
drift is consistent, I think you should be able to reduce it by adjusting
RA on the thermistor board.

73 Kevin w9cf

>That being said, I still do notice a temperature-dependent 
>frequency drift during normal usage.  The drift is 
>predictable, with the zero beat on the dial I get with 
>reference to WWV drifting by as much as 70-80 Hz if the 
>temperature difference between ambient and the max temp the 
>rig hits with the KPA100 under heavy use is large.  The 
>frequency at which I can zero-beat WWV does not change 
>unpredictably.  The radio consistently zero-beats low (e.g. 
>WWV zero-beats at 10.000.07) when cold.

>Adam, N1KO