Sure be nice if you could put them up on some photo site and let us see
them.
----- Original Message -----
From: "ewkehren" <[email protected]>
To: <[email protected]>
Sent: Tuesday, September 24, 2013 12:28 PM
Subject: Re: [time-nuts] HP5061B Beam Tubes
Did send Bill some pictures off list
Bert
Sent from Samsung tabletpaul swed <[email protected]> wrote:I have
numbers of pix. Each is 2 MB so need another way to handle it.
You will get a good feel from the pictures what I did. Schematic is paper.
Lots of notes I would have to re-decode. It was Oct 2011.
Regards
Paul
WB8TSL
On Mon, Sep 23, 2013 at 8:14 PM, wb6bnq <[email protected]> wrote:
Hi Bert,
Any chance of some high resolution photos ?
Bill....WB6BNQ
[email protected] 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,
[email protected] 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: [email protected] [mailto:time-nuts-
[email protected]] 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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