[R-390] Tube extenders

[Steve Hobensack]

Yes, tube extenders are getting rather rare these days. I made my own. It 
takes a little patience but can be done by most of us. Find a miniature tube 
and socket. Break the evacuation tip to destroy the vacuum. Use a dremmel 
tool with a glass cutting wheel, or special hacksaw blade, and cut the tube 
near the base. Solder up short insulated leads to the socket. The hard part 
is cutting the glass.
.....Steve...N8YE

Date: Sat, 11 Aug 2007 19:28:27 -0700 (PDT)
From: wli <wli98122 at yahoo.com>
Subject: [R-390] re: tube extenders
To: Perry Sandeen <sandeenpa at yahoo.com>
Cc: R-390 at mailman.qth.net
Message-ID: <820059.10505.qm at web54507.mail.re2.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1

Perry:

Tube extenders are useful. Look in those myriad of
unmarked boxes at hamfests. I found mine there for $2
apiece last year. You have to be on the lookout as
they do not turn up often....

One caveat: some of them may have a busted wire
INSIDE. Pays to check continuity between the pin and
the test point as well as the socket hole. I had two
such *defective* extenders, easily fixed with a short
piece of bare wire and a little surgery on the device.

I understand that many of us never use them, they are
better at diagnosis than I;.... and I need all the
help I can get.......

W. Li
Mercer Island, WA

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