[time-nuts] 5060A acoustic noise issue

wa1zms at att.net wa1zms at att.net
Wed Jan 9 00:50:33 UTC 2008


Corby-

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.

Thanks!

-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


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

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