[time-nuts] 5060A question

wa1zms at att.net wa1zms at att.net
Mon Jan 7 20:43:55 EST 2008

Thanks to everyone who gave me feedback about the 2KHz whine
from my HP-5060A. It appears to be the nature of the design
and I'm not quite willing to try and re-design the oven controller
to convert it from 2KHz AC to DC.

I guess my 5060A will continue live in the back room where it's
not heard much.

-Brian, WA1ZMS

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
Behalf Of Frequency Standards & Services
Sent: Wednesday, January 02, 2008 1:21 PM
To: Time Nuts List
Subject: Re: [time-nuts] 5060A question

This was one of the reasons that HP eventually went to the DC oven
controller. Even the early 5061A had this same problem. The 5060A and the
early 5061As had an AC oven controller. When they changed to the DC
controller, it probably saved a lot of people from insanity.
some of the other reasons were the transformer taps that had to be changed
when a new tube was installed, parts issues improved design,
manufactureability, etc...

Chuck Norton
Frequency Standards & Services
2727 E. Palmer Park Blvd. Ste. 100
Colorado Springs, CO. 80909-5068
719-228-0540   Voice
719-228-9009   Fax
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