There's no internal bypassing of the EFC line in the 10811A at all.
Bruce
J. Forster wrote:
Here's a guess: Is there an electrolytic capacitor that bypasses the EFC
to GND? Maybe that's bad. I don't have a schematic.
-John
==============
Hi,
I have two HP10811 oscillators that do not respond to EFC voltage.
The latest to fail had been quite accurately set against a TBOLT,
one morning (after being on standby in a HP5328A) it was off frequency
and would not shift with EFC but would adjust with the coarse adjust.
I have bought in two Phillips varicap diodes, BBY40 and BB149A,
but before I did some damage fault finding in the HP10811s I thought
it wise to ask for any advice that was available.
While I am playing with them I may try to readjust the temperature
setting
of the oven to get on top of the turnover. Can anyone point me to
that article?
cheers, Neville Michie
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.