[Elecraft] K2 frequencyh stability

[John, KI6WX]

I believe the N1KO data was that he observed a drift of 80 Hz, not 800 Hz. 
A drift that large would indicate something seriously wrong in one of the 
oscillators.  The current K2 design is not as good as a TCXO, but it is a 
lot better than an unstabilized crystal oscillator.  It should be possible 
to reduce the drift to significantly less than 100 Hz over a temperature 
range of 10-50C with adjustment of resistor RA in the temperature 
compensation circuit.
-John
 KI6WX

----- Original Message ----- 
From: "VR2BrettGraham" <vr2bg at harts.org.hk>


> For a point of reference for N1KO's observed 800 cycle
> drift as his K2 warms up with use, I looked up the specs
> for one of my non-TCXOd radios (IC-765) & overall the radio
> can drift +/- 350 cycles from 0 to 50C & after 1 minute
> from switch on, +/- 200 cycles in the first hour.
>