[Elecraft] Reference Oscillator Calibration Method 3

[Paul Kirley]

Implementation of Method 3 would improve the stability of all K3s,
not only those with the optional TCXO.

Calculation of a drift-correction table via repeated Method 1 or 2 
calibrations (as the K3 warms up) can be performed by the owner for
any reference oscillator, whether stock or optional.  

The drift-correction table could then be input to Method 3, decreasing
drift regardless of the type of reference oscillator.

73, Paul W8TM

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Wayne N6KR sed:
At present, "method 3" remains unimplemented. Fortunately the TCXO's  
uncorrected drift is already less than +/- 0.5 PPM from 0 to 50 C.  
This was the target for "method 3".