[time-nuts] Bad batch of HP10811's
John Miles
jmiles at pop.net
Sun Jan 14 20:07:46 UTC 2007
That's almost always caused by the thermal fuse on the outer PCB. They tend
to open up due to aging. Just short it out... it was a ridiculous place to
put a thermal fuse anyway.
-- john, KE5FX
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
Behalf Of Jack Hudler
Sent: Sunday, January 14, 2007 12:00 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] Bad batch of HP10811's
Who sold them?
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf
Of Mark Amos
Sent: Sunday, January 14, 2007 1:41 PM
To: time-nuts at febo.com
Subject: [time-nuts] Bad batch of HP10811's
Time-nuts,
Seems like a bad batch of HP10811's was dumped on e-bay over the holidays...
Some (at least
2) won't tune up to 10MHz: one won't adjust above 9,999,530 and the other
peaks
around
9,999,920 after warming up for a day or so. It seems to stay on frequency
(albeit the wrong
one...)
I did some preliminary checks (internal reference voltages, OK, etc.) I'm
thinking that it
must be a bad crystal to be this far off.
C'est une cause perdue? (I.e. did I buy a "parts" unit?)
Mark
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