[Elecraft] [K2] CAL FIL Temperature Sensitivity Question

[John Oppenheimer]

Hi Don,

My question is directed specifically at the CAL FIL BFO frequency being
100 Hz different between cold and warm. As mentioned, because the BFO
frequency is off by 100 Hz, the 200 HZ filter is unusable because a
properly received pitch will place the signal on the filter skirt.

This K2 serial number is above 7K

The test is: Multi hour warm up, enter CAL FIL, measure and record a
filter BFO frequency. Next morning, cold start, perform same measurement
as above and compare the difference between the two BFO readings.

John KN5L