[time-nuts] 5060A acoustic noise issue

wa1zms at att.net wa1zms at att.net
Tue Jan 8 19:50:33 EST 2008


That's interesting to know that somebody has performed
the conversion at least once before.

I have a 5060 "donor chassis" and maybe that would be
the one to try and see how I might fit an A11 module
in place of the A20.


-Brian, WA1ZMS

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
Behalf Of corby d dawson
Sent: Tuesday, January 08, 2008 11:48 AM
To: time-nuts at febo.com
Subject: [time-nuts] 5060A acoustic noise issue


I once obtained a 5060A that was used in the time and frequency lab at

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

Best regards,


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