[time-nuts] HP5065A C-field mods and optical unit mods
phk at phk.freebsd.dk
Mon Nov 20 16:08:19 EST 2017
In message <5AC3D7F0C1F14BAB8B7BE4A552034FCC at dell370>, ws at Yahoo via time-nuts writes:
>C-fields are current sensitive, so if they are wound with copper wire, any
>small change in their temperature, even when temperature controlled, could
>have a effect much greater than 1PPM on that current when driven from a
>fixed voltage thru a resistor.
>Does anyone use current drive?
The standard circuit is current drive...
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