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

[paul swed]

Thanks Bert as I say I am no expert on the FTS. Also I was surprised to see
that they seem to sell at quite reasonable prices like $3K.
There is a site nixxiebunnie that has several nice internal pix. The bottom
pix shows the low V supplies and voltages thats printed on the supplies.
Good place to take a look.
Regards
Paul.


On Wed, Oct 2, 2013 at 9:19 AM, <EWKehren at aol.com> wrote:

> Your observations are tru for HP tubes but not FTS. I see FTS tubes after 2
>  years pump down in 20 minutes.
> Bert Kehren
>
>
> In a message dated 10/2/2013 9:17:07 A.M. Eastern Daylight Time,
> paulswedb at gmail.com writes:
>
> 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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