[time-nuts] FTS 1200

EWKehren at aol.com EWKehren at aol.com
Thu Aug 9 21:06:48 EDT 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



_______________________________________________
time-nuts  mailing list -- time-nuts at febo.com
To unsubscribe, go to  
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the  instructions there.



More information about the time-nuts mailing list