[time-nuts] HP 5061 zeeman frequency experiance

paul swed paulswedb at gmail.com
Tue Oct 4 13:03:21 EDT 2011

I don't have a 5060 manual only a 5061a manual. I am using the 5060 tube in
a 5061 frame.
Makes things quite interesting.

On Tue, Oct 4, 2011 at 11:26 AM, John Miles <jmiles at pop.net> wrote:

> > But does anyone have comments on the meter approach HP suggested.
> > I really need to understand whats semi normal for  old tube.
> > I suspect I may be sitting near the noise floor of the system.
> You've checked the 5060A manual to see if they give noise-floor test
> details, correct?
> > As for the network analyzer I just happen to have a HP 8505 so may give
> this
> > a try. Suspect I will see the fingers but very close to the noise floor.
> The 8505 may not be stable enough to let you see what's going on, but it's
> not too hard to rig up something else that will be.  I don't know if you've
> seen my attempt at sweeping a 5062C tube:
> http://www.ke5fx.com/cs.htm
>  http://www.leapsecond.com/images/cfield.gif is another nifty manual-sweep
> plot.  I'm unsure of the tech details behind Tom's setup but it was
> probably
> more manageable than mine.  I think he just plotted the meter current, with
> the tube running in its native 5061A habitat.
> -- john, KE5FX
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