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

[John Miles]

How's the voltage across the hot-wire ionizer, and the mass spec voltage?  I
assume the other meter readings are within the tolerances given in the
manual?

Hopefully it's not an open ionizer filament.  I bought one tube on eBay
awhile back that had good vacuum but no ionizer continuity.

-- john, KE5FX

> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
> Behalf Of paul swed
> Sent: Sunday, October 18, 2009 9:25 AM
> To: time-nuts at febo.com
> Subject: [time-nuts] hp5061a/b no I beam current
>
>
> Lets see if this works.
> I am new to the time-nuts user group
> Just obtained a HP 5061a CS standard. Pumps down very well to 0 (Hard to
> believe) But it did.
> CS oven comes up to temp. But in operation no I beam current.
> Noticed that the tube states -2083V multiplier. But its
> regulating to -1606V
> can adjust to 2083.
> Still no current. Also no 2nd harmonic but with No I that's what I expect.
> Its an interesting unit from the naval observatory.
> I have the traditional 5061 a service manual. Its halfway between
> a A and a
> B unit.
> As example A15 power reg is using ICs and I found a website with that
> schematic.
> The CS control board A11 also is using ICs at least 3 switching
> supplies us
> SG3524s
> I would like to see a schematic of this if anyone has it. Though I suspect
> that the CS board is fine.
> I want to check several of the voltages though.
> Any help would be appreciated.
> Thanks
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