[time-nuts] FTS 1200
EWKehren at aol.com
EWKehren at aol.com
Fri Aug 10 01:06:48 UTC 2012
John
Oven did reduce in current and I can not imagine that it would be that
close with an overheated oven. At 0 V it is within .5 Hz of what they normally
are. Ground has no effect but even 0.8 V on pin 2 stops oscillation
Once it stops it takes about 10 seconds to continue oscillation, about 0.1
Hz higher and within an other 10 seconds is within 2 E-10 back to the
previous value.
Bert
In a message dated 8/9/2012 8:58:36 P.M. Eastern Daylight Time,
jmiles at pop.net writes:
> In a message dated 8/9/2012 8:07:24 P.M. Eastern Daylight Time,
> bg at lysator.liu.se writes:
>
> Hi Bert,
>
> So the EFC does not work at all? (or did I miss something obvious?)
>
> /Björn
>
> > The unit starts high and over 20 minutes comes down to 4.9999975 with
0
V
> > on the EFC. Any voltage on pin 2 and it quits oscillating.
> > Bert
What happens to the current drain as the unit warms up? Does it fall off
after 5-10 minutes as expected? If not, it sounds like the oven controller
may be stuck on, overheating the crystal. I'd look into that possibility
sooner rather than later.
-- john, KE5FX
www.miles.io
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