Hi Bert,
Any chance of some high resolution photos ?
Bill....WB6BNQ
ewkeh...@aol.com wrote:
Twelve years ago I did disassemble a regular and a high performance tube,
the only negative effect was I joined time nuts. The guts still decorate my
window sill. The only parts inside that may be temperature sensitive are
some copper wires with a clear coating. Every thing else is metal or ceramic.
Bert Kehren
In a message dated 9/23/2013 5:44:22 P.M. Eastern Daylight Time,
j...@miles.io writes:
I've always wanted to try baking the entire tube to vaporize any
accumulations of Cs metal outside the internal oven. Is that what you
did,
Paul? If some of the free cesium metal near the detector can be
recondensed
at the oven end, or just redistributed uniformly throughout the tube, it
might render a noisy tube usable again.
The point at which cesium vaporizes is 250C / 482F, and that seems like it
could be survivable unless there are thermoplastic structures or insulation
sleeves inside the tube for some reason. The operation might be tricky,
because while you wouldn't want to heat the tube sufficiently to vaporize
all of the remaining cesium in the internal oven, you would also need to
bake the tube for quite some time to heat its internal structures
uniformly,
since it's basically a vacuum bottle. Outgassing from various internal
materials and structures would also be a concern. Something to try with a
tube that is otherwise ready for the scrap heap...
-- john, KE5FX
Miles Design LLC
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-
boun...@febo.com] On Behalf Of paul swed
Sent: Monday, September 23, 2013 12:52 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP5061B Beam Tubes
Tom
I added 10 degrees and used the built in temp sensor in the tube as a
gauge. So its sort of accurate to say 10 degrees. I remember evaluating
the
temp several ways.
I did not return it to original temp as I believed at the time I was
baking
out the last few Cs.
What your saying in the threads very interesting. But don't have time to
go
back and adjust or reconnect the old oven controller. I would have to
look
at all of that again to see whats needed. I did this about 2 years ago
its
in the time nuts archive I suspect.
Regards
Paul.
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