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" <[EMAIL PROTECTED]>
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.
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