[time-nuts] Cesium DOES Drift, not

wa1zms at att.net wa1zms at att.net
Wed Apr 20 21:45:22 EDT 2005

At the risk of misleading Brooke down the wrong path....

For what it's worth, my copy of the HP-5060 manual talks about
using the LF coil to test for a possibly magnetized cesium tube.
The injected audio test signal is swept from 50Hz to 5kHz. Any
sharp peaking in beam current above 2500Hz indicates possible

I have no knowledge if the FTS tubes have an LF coil.

-Brian, WA1ZMS

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com]On
Behalf Of Chuck Harris
Sent: Wednesday, April 20, 2005 9:32 PM
To: Discussion of precise time and frequency measurement
Subject: Re: AW: [time-nuts] Cesium DOES Drift, not

No, that isn't quite it!  You disconnect the offset magnetic
coil, and connect it to a variac with a series light bulb to limit
the current.  I cannot tell you what size bulb to use, or how much voltage,
as I would have to make some educated guesses.  Make the wrong guess,
and B/O is possible.

I read about the technique somewhere, I just don't recall where.


Brooke Clarke wrote:
> Hi Chuck:
> OK.  I can set the 3 thumb wheel switches to 999, wait some, then to 000 
> wait some, then to 900 , 100, etc. etc.
> How many steps is reasonable and how long to wait?
> Thanks for that idea.
> Brooke
> Chuck Harris wrote:

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