[time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum

[paul swed]

Boy is this good advice thats why I turn Frankenstein 9$125 flea market
special)on every quarter check that it works etc. The ion pump being 0 is
the place to start looking as Joe says 0 is very very hard to believe in
the types of C units we get. Usually they have gas and the needle pegs or
is quite high stopping the unit from starting.
So do basic troubleshooting first. All voltages RF....
Many of us here have experience with the HPs so the FTS may not have the
places to take a look and see whats going on that  the HPs have.
Regards
Paul


On Wed, Oct 2, 2013 at 7:28 AM, Bob Camp <lists at rtty.us> wrote:

> Hi
>
> Welcome to the reason a lot of us don't have running Cs standards.
>
> There is a very basic wear out mechanism with Cs. Once it's moved from one
> end of the tube to the other, the tube is dead. There is no practical way
> to rebuild the tubes. Running one will simply wear out the tube. They are a
> very expensive toy to keep working.
>
> Bob
>
> On Oct 1, 2013, at 9:53 PM, Tom Miller <tmiller at skylinenet.net> wrote:
>
> > Update.
> >
> > I received the FTS 4060 unit and guess what - it does not work.
> >
> > So a few questions to the experts on this list-
> >
> > 1)  How can I verify that the CBT is in fact bad? Is there any easy way
> to confirm the high voltage supplies are working short of pulling the CBT
> assembly out and making direct HV measurements? How about the other tube
> functions? There is no beam activity on meter 3 and the ion pump voltage is
> 0.
> >
> > 2)  If it is a bad tube (likely), is there any way it can be rebuilt?
> Does anyone do such a thing?
> >
> > 3)  Is there any source for used tubes?
> >
> > 4)  If this is a dead end, is there any value in the rest of the unit?
> This one has the display clock and the 5 MHz and 100 kHz options.
> >
> > Or should I just bury it in the back yard and lick my wounds?
> >
> >
> > Regards,
> > Tom
> >
> >
> > ----- Original Message ----- From: "Tom Miller" <tmiller at skylinenet.net>
> > To: "Discussion of precise time and frequency measurement" <
> time-nuts at febo.com>
> > Sent: Tuesday, September 24, 2013 7:10 PM
> > Subject: [time-nuts] FTS 4060 Cesium Time & Frequency Standard, Datum
> >
> >
> > While we are on Cs standards, is there technical information (service
> > manual) available for the Datum FTS 4060 Cesium Time & Frequency Standard
> > and its options?
> >
> > Thank you,
> > Tom
> >
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