AW: [time-nuts] Strange effect with C-Field change -- and a bit ofdata

Hubert v. Bonhorst hvonbonhorst at
Sun Mar 27 10:23:30 EST 2005

Does anyone have a datasheet on 71xx FTS tubes. Any information is helpful.
Thank you in advance

-----Ursprüngliche Nachricht-----
Von: time-nuts-bounces at [mailto:time-nuts-bounces at] Im
Auftrag von Chuck Harris
Gesendet: Sonntag, 27. März 2005 15:50
An: Discussion of precise time and frequency measurement
Betreff: Re: [time-nuts] Strange effect with C-Field change -- and a bit

John Ackermann N8UR wrote:
> Chuck Harris wrote:
>> I remember reading an advertisement from FTS many moons ago that said 
>> they
>> had for sale higher quality replacement tubes for 5060's, 5061's, and 
>> 5062's.
>> Your replacement tube is most probably one of those tubes.
>> Remember, FTS was a direct competitor for HP's line of C-Beams, and as 
>> such they
>> coveted all aspects of HP's C-Beam market.
>> -Chuck
> Yes, in fact FTS (or Symmetricom or whatever they are this week) still 
> advertises their replacement tubes for the HP units.  Interestingly, 
> they have an 8 year warranty, so FTS must have been able to improve the 
> reliability along the way.

The FTS tubes are so good, that I always expect the ones I find to work!
I have brought up several that were more than 15 years old.  Try that with
an HP tube.


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