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

John Miles jmiles at pop.net
Tue Oct 20 09:21:15 UTC 2009



> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of paul swed
> Sent: Monday, October 19, 2009 6:32 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] hp5061a/b no I beam current
>
>
> I think I am on the trail of the issue.
> Several things I now understand.
> Somethings up with the -2500 supply its not the photo multiplier.
> The regulators feeding perhaps4-6V to it and thats about -1000 not 2000
> To make 2083 volts needs 15-16.
> The voltage at the test point shows nothing but ringing so
> impossible to set
> the em voltage by that test point and perhaps what I have been seeing
> thinking it was correct.

Sounds like an open capacitor somewhere, either inside the EM supply module
or external to it?  The voltage-setting reference point should be DC.

-- john, KE5FX





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