Ira and Matthew...
I had a browse of Kohl. Chpt 15 is Cathode Materials and Structures,
pages 519 - 573. There are seven pages of References.
If I knew which of the boggins of cathode materials are involved it would be
easier. Too much info :-(
Many cathodes start with a carbonate and
Many of your tubes probably should be in your semiconductor collection.
And, if semiconductor is a dirty word, then in the bin !
Reference:- Kohl, Materials and Techniques for Electron Tubes A completely
revised edition of Materials Technology for Electron Tubes., 1960, Reinhold.
Page 551
Den 28/04/2014 kl. 22.47 skrev Matthew Smith m...@smiffytech.com:
Quoth Tidak Ada at 2014-04-29 06:13 ...
I once opened a 50 cm B/W picture tube to make a lamp of it. I carefully
packed the tube in thick blankets and then filed off the exhaust nipple.
About one minute of hissing and the
Hello John,
Please let us know what you find. Thanks Ira.
On 4/29/2014 12:26 AM, JohnK wrote:
Ira and Matthew...
I had a browse of Kohl. Chpt 15 is Cathode Materials and
Structures, pages 519 - 573. There are seven pages of References.
If I knew which of the boggins of cathode
OK, I've repurposed 2 gun assemblies. Let me describe the process. As
y'all found out the indirectly heated cathode is coated with a
strontium/barium/calcium carbonate mixture. During processing this is
turned into oxides by simply heating the filament while under vacuum.
When vented to air,
Ira,
My experience is that cathodes lay in trays in the factory. About 250 n a
tray, that was sealed before it went to the production. So I believe that
exposition to air will degrade the cathode, but not destroy it immediately.
However it could be that the first warm-up initiates a chemical
Hello Tidak,
You are absolutely correct in that the first warm up to 'higher
than normal temperatures' does in fact activate the cathode
material/coating. Go here
http://www.earlytelevision.org/15GP22_rebuild_report.html and near
the bottom of the page, the second sentence just
Well, none of my hobbies are cheap. Energy efficient either!
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About a decade ago I made some incandescent light bulbs out of surplus labware
for a client. I made my prototypes with 250 ml e flasks and the final bulbs
with 2,000 ml flasks. I had great luck working with the pyrex glass without a
cooling oven. Two of the three finals burned for over 200
Don't forget, the mayor part of tubes is...silicon oxide !
eric
_
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of JohnK
Sent: dinsdag 29 april 2014 9:40
To: neonixie-l@googlegroups.com; tubecollectorsassociat...@yahoogroups.com
Subject: [neonixie-l]
And again there is closing a CRT rebuilding plant. This time in France. A
bit too far from my home.
See the mail I received from Giorgio. No TCA members in the direct
environment...
Anyhow, they would have cathodes.
eric
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From: neonixie-l@googlegroups.com
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