[time-nuts] HP5061B Versus HP5071 Cesium Line Frequencies

[cdelect at juno.com]

Donald,

HP changed from 12.631771.6 Mhz to 12.631772.5 Mhz in the later days.

The Zeeman frequency changed to correspond from 42.82Khz to 53.53Khz.

The 5071A uses a Zeeman frequency of 39.949Khz.

I believe they liked the stability a bit more at the different C-field
current.

Either way will put you correctly on frequency at the output (5 or 10Mhz)



See:

https://www.febo.com/pipermail/time-nuts/2005-April/018171.html

Read Toms reply and my post below his.

The 5071A synthesizer is always jumping around to control the C-field.

It's basic frequency is 131.8Khz

Basic info here.

http://leapsecond.com/corby/5071comb.pdf

Cheers,

Corby