[time-nuts] FTS 4065A schematics?

paul swed paulswedb at gmail.com
Sun Jul 12 02:56:25 UTC 2020


Jim
I do not have a 4065. But a 4060 and it uses a +31V supply. Its derived
from the common 24V supply by a DC/DC up converter. The tantalum caps had
burst and eaten many traces and parts. No real way to repair that damage
though I seriously tried. When that all failed, I simply introduced a nice
31 VDC supply. System is up and operational and locks quite quickly.
Just a thought that may help you.
Regards
Paul.

On Sat, Jul 11, 2020 at 10:34 PM AC0XU (Jim) <James.Schatzman at ac0xu.com>
wrote:

> Time Nuts-
>
> Another project - have an FTS 4065A cesium beam reference with what
> appears to be a short in the -34V supply line. I have the 4065C Operators
> Guide, which has partial schematics. However, the C version apparently has
> only a +34V main supply, whereas the A version has both + and -34V.
>
> Does anyone have manuals or schematics for the FTS 4065A?
>
> Thanks!
>
> Jim
>
>
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