[time-nuts] Input voltage for Zeeman on 5061A
Chuck Harris
cfharris at erols.com
Sat Jan 22 15:20:46 UTC 2005
The Zeeman frequency is a characteristic of the tube. Most FTS tubes
have their main Zeeman peak at 42.820kHz, and the two peaks on either
side are at 41.800kHz, and 43.800kHz.
1 Vrms is what the 5061 wants to see (The Zeeman input is a 50 ohm load
IIRC).
-Chuck
John Ackermann N8UR wrote:
> Anyone know how much voltage you need to drive the Zeeman input on the
> 5061A? I just tried to set mine and found that the maximum output from
> my 3325A (3V RMS) was barely enough to see any wiggling at all on the
> beam current meter I have another generator that goes up to 6V and that
> got me a bit more, but even then only a few meter divisions between peak
> and dip.
>
> Either I need a heftier generator (or maybe an impedance step-up), or
> we're back to the question of what is the right Zeeman frequency for an
> FTS tube in an HP chassis.
>
> Thanks,
>
> John
>
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