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

paul swed paulswedb at gmail.com
Sun Oct 18 16:25:30 UTC 2009


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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