Gary,
I used my XG3 for doing the temperature compensation procedure and
continuously monitored its frequency with my EIP538 counter (has TCXO
reference). I ran the XG3 from external 13.5v to ensure constant
level and had it running 30-minutes in advance to ensure it was
stabilized. I noted only about +/- 1 to 2 Hz variation in the signal
during the whole procedure. My attempts to use the 5th overtone of
my 10-MHz OCXO was unsuccessful due to the harmonic level not being
high enough. I didn't try "banging" a diode to produce higher level harmonics.
I am fairly satisfied the XG3 was adequately good enough for doing
the procedure. I suspect your A/C is causing a cold draft producing
the drift you are seeing. Try enclosing in inside an insulated
box. We have no A/C here in Alaska. If it gets warm enough we open
what are called windows! But I used to live in SoCal so understand
the need down there!
73, Ed - KL7UW
------snip
My lab is in my photographic darkroom which has an ambient temperature
of about 68 degrees F and the AC does blow across the work area.
Thanks,
Gary Marklund
KJ7RT
Sun City, AZ
USA
73, Ed - KL7UW
http://www.kl7uw.com "Kits made by KL7UW"
Dubus Mag business:
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