cctalk Digest, Vol 9, Issue 38 (Was: ADM-3A) - test-drb@ccmp.vtda.org

21 May 2004

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  would be-they are very common. But they even had
 CRT
  spares for my  HP2644A (8008 based terminal-for
 $250.00! But I (physically) rebuilt that tube  myself.

 You mean you opened it up, replaced the
 cathode/heater (about the only 
 part that failes), reassembled it, pumped it down,
 baked it out, etc? 
 How? This is something I've never had the courage to
 try, and I don't 
 have the necessary equipment -- yet!

Well, no, the problem with these CRT's is that they
have a RTV-like implosion shield between the front of
the tube and another layer of glass. Over time, the
RTV develops a mold from the edges in and the tube
looks horrible and becomes unusable. I worked up the
guts to cut between the tube and the plate with a
nichrome wire. Not recommended for the sane. I
replaced the shield with aquarium RTV at the edges.
The tube works very well now.

.

=====
-Steve Loboyko

Incredible wisdom actually found in a commerical fortune cookie:

"When small men cast long shadows, then it is very late in the day."

Website: http://juliepalooza.8m.com/sl

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