[time-nuts] Efratom PTB-100

Don @ True-Cal True-Cal at swbell.net
Fri Jul 13 16:06:35 EDT 2007

Hello Folks,

I am looking for a manual, or at least a schematic for the Ball Efratom PTB-100 Rubidium Time Base (Tek TM-500 plug-in). The Rb oscillator is working fine but there is a problem in the control and TTL conversion circuits.

Thanks for any help...

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