[time-nuts] Cesium DOES Drift, not
wa1zms at att.net
wa1zms at att.net
Thu Apr 21 01:45:22 UTC 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
magnetization.
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.
-Chuck
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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