[time-nuts] Input voltage for Zeeman on 5061A

[Chuck Harris]

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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