[time-nuts] New member, new old 4040A with PSU failure

[Tom Van Baak]

Patrick,

Nice find on the PRS10 and Datum/FTS 4040. The cesium is definitely 
worth trying to get working. See if either of these pages help:

http://leapsecond.com/museum/fts4040/

http://leapsecond.com/museum/fts-7504/

The thin red / black wires you speak of are the +24 VDC and +10 VDC 
power *into* the HV modules. The actual HV *output* comes out of those 
special (black & green, or pink) highly insulated connectors. Let us 
know if your 4040A looks anything like what you see in my photos.

----

If anyone on the list has experience with rodents, you'll notice the 4th 
photo of the fts4040 link above shows that a mouse nibbled on the pink 
silicone insulation around the HV connections. So be careful where you 
store your old cesium standards. I'm used to bugs in s/w but rats in h/w 
is a new low. What kind of HV goo should I replace it with?

/tvb


On 9/25/2020 12:10 PM, Patrick Tanner wrote:
> Hi folks.
>
> I'm new to the board, my name is Patrick. I'm a career RF/systems engineer.
> Greetings all around!
>
> I just made a couple of 'good' handyman special buys on the worlds largest
> auction. I got a PRS10 that needed a new SA612A mixer that I got working,
> so, happy about that. Thanks to KO4BB for having the schematics.
>
> I also picked up a FTS4040A, apparently with a failed PSU. Its labelled
> 'high voltage' , but the dinky 24? 26? Ga output leads (red/black 3x
> ganged) don't led me to believe that there' s 2.2kV here. Can any one shed
> some light on what this PSUs output is? I'm hoping that I can either fix or
> replace it and find a diamond here.
>
> Thanks for your help.
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