[time-nuts] time-nuts Digest, Vol 90, Issue 38

[Jerry]

I have found that my FE-5680A of the latest crop will run fine from a
+12 volt supply turned up to 13.8 or so with a 5 v regulator for the
secondary voltage.  This works well for a battery operated reference
in the field.
W5RCQ

On Fri, Jan 6, 2012 at 5:00 AM,  <time-nuts-request at febo.com> wrote:
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>   1. FEI 5680A Power (EWKehren at aol.com)
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> Message: 1
> Date: Fri, 6 Jan 2012 06:29:26 -0500 (EST)
> From: EWKehren at aol.com
> To: time-nuts at febo.com
> Subject: [time-nuts] FEI 5680A Power
> Message-ID: <7593.3c66bc8e.3c383516 at aol.com>
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>
> The test I have been conducting for the last 6 weeks uses a 15V 3A Toshiba
> switcher feeding the 5680A through a filter and a 78M05 for the five volts.
> For  the last 5 weeks I have temperature control and I still se no aging.
> As I  mentioned before I read 1E-12 over 1000 seconds since Tbolt variations
> exceed  1E-11 at a second.  Can not explain why I see no aging. Heat sink is
> at  37.2 C   Once I have established aging I will interface it to a Shera
> controller.
> Bert Kehren
> PS with our cold spell I let the temperature in the lab drop 5 C and the
> fan duty cycle went from 39% to 7 %!
>
>
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> End of time-nuts Digest, Vol 90, Issue 38
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