[time-nuts] Making a HP 10811 better
Bob Camp
lists at rtty.us
Fri Mar 26 16:15:43 UTC 2010
Hi
The true zero axis will be different for each individual oscillator.
Bob
-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Peter Putnam
Sent: Friday, March 26, 2010 12:08 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Making a HP 10811 better
Warren,
Could you post a drawing or photo showing the proper orientation of the
zero-G axis?
Thanks,
Peter
WarrenS wrote
... snip .... snip ....
> I know how to make major improvements to the 10811 so that the
> standard stuff does not have ANY measurable effect on its freq.
> Nothing really magic, mostly simple things like secondary PS
> regulators, an outer oven heater wrap and controller, some internal
> span and reference voltage adjustments, tilt it on its Zero G axes,
> add an RF buffer, isolate or have a less sensitive EFC input, a fine
> freq adjustment pot, and probable others once I get into it more.
>
> ws
>
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