[time-nuts] hp5061a/b no I beam current

[paul swed]

Well I may be striking out here.
Ionizer seems fine
Did find the 3500 V supply at 3750
Reduced with a 100 ohm R in the 18.75 feeder
Tried the LF coil no luck on the tube no reading
Checked ac amp lots of gain 80+db also fiddling around with that cable input
did make the I beam meter move.
So that circuits good.
Checked the 90 MHz and 12.63 MHz both good. Discovered by the 12.63 the
system is set for atomic time.
About all thats left is to pull the frequency multiplier and check the 9GHz
sig.
But I believe the LF coil would have proved that and it did not.
I sense the EM is DOA.

I need to study up on those. But I speculate the only thing that runs that
is is the -2500V.
When I have seen them at hamfests I am unsure anything could go wrong with
them.
Do not recall a filament. That would basically leave me perhaps a open R in
the multiplier string.

Its a shame because this is a very clean 5061from the Naval Observatory.




On Wed, Oct 21, 2009 at 2:45 PM, John Miles <jmiles at pop.net> wrote:

> That'd most likely be normal.  The filament behaves just like a light bulb
> in that regard.  The supply can't deliver 10 amps, presumably, so if it can
> put 1 volt across it, the resistance should be in the right ballpark.
>
> -- john, KE5FX
>
> > -----Original Message-----
> > From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> > Behalf Of paul swed
> > Sent: Wednesday, October 21, 2009 5:03 AM
> > To: Discussion of precise time and frequency measurement
> > Subject: Re: [time-nuts] hp5061a/b no I beam current
> >
> >
> > Anyone ever see an ionizer short?
> > I am reading .1 ohm, though like a light bulb maybe it goes up when hot.
> > That seems low though at 1 volt and 1 amp maybe not.
> > Your comment of 1-2 ohms is not what I am seeing. Though I do see
> > 1 v across
> > it in operation.
> >
> > On Tue, Oct 20, 2009 at 5:21 AM, John Miles <jmiles at pop.net> wrote:
> >
> > >
> >
>
>
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