KI6WX added:
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 s
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 possibl
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.
Bung in a 0.5 ppm T
Adam,
I assume you are referring to drift of the 4 MHz master oscillator and not
to a drift in the PLL reference oscillator.
Drift in the 4 MHz reference is of little to no consequence in normal
operation of the K2. It is only important at the time CAL PLL and CAL FIL
are performed.
The K2 does
You don't mention what you mean by "master frequency" nor how you measured
the drift, but I believe you've misunderstood the purpose of the 4MHz
oscillator. It is used to program the lookup tables for frequency
generation, but during normal operation it's exact frequency does not
matter.
So, you s
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