Paul, First off, is it a 5060A or 5061A?
More C-field current increases frequency. You can check the synthesizer frequency, It should be 12.6317716 or 12.6317725 Mhz. Either one is OK as you select the A15 resistor to center the C-field pot anyway. Here is info from an earlier post. The zeeman frequency required depends on two things, the magnitude of the > C-field current and the synthesizer frequency. > > HP 5061A and B units that have a synthesizer freq. of 12.6317725 Mhz are > configured for a lower value of C-field current by selecting a higher > value series resistor on the A15 board. In this case any tube installed > (5061A/B 5060 4050 4060) will operate at the 53.53Khz zeeman frequency. > > HP 5061A and B units and 5060A units that have a synthesizer frequency of > 12.6317716 Mhz are configured for a higher C-field current due to a lower > value series resistor in the C-field circuit. In this case any installed > tube will operate with a 42.82Khz zeeman frequency. > > Problems arise when synthesizer and or A15 modules are swapped around > indiscriminantly leaving a unit with modules that do not match! > > Since the HP and FTS tubes C-field windings are designed to provide the > same field for a given input they are interchangeable. You can operate > any of these tubes at a 42.82 or 53.53Khz zeeman. I usually just stick > with how the mainframe came configured. Corby Dawson _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
