I've been debugging a FTS 4050 with the 5000M module.
It looks like the problem is the FTS 1200-100 OCXO. It seems to have aged
to the point that it is very low in frequency. (Chuck Harris reported a
similar situation a long time ago.)
I have it out of the 5000M and determined that I need to give it +8.8V on
the control to get it within 50uHz of 5 MHz.
The power draw after a short warm up is < 2.5W (on this hot day); it looks
like the oven is behaving.
Has anyone figured out how to adjust the nominal frequency of an FTS 1200
-100 to recover the EFC range?
Also, anyone have a schematic for any model of the FTS 1200?
73 de AI6KG
time-nuts mailing list -- email@example.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.