[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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