Brian, I once obtained a 5060A that was used in the time and frequency lab at HP.
I guess it had sentimental value to them as they kept it going long after the 5061B had come out. It had a newer tube in it and more to the point it had one of the later 5061A/B style A11 oven controller modules installed. This provides DC to the hot wire and no acoustic noise! I can't remember where they shoe-horned it in as it is a taller module than the 5060As. These A11 units are obtainable and the modification would not be daunting. Best regards, Corby _______________________________________________ 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.
