[Hallicrafters] Crystal / Tube modification.

[Roger Halstead (K8RI)]

Hi Waldo,

It may be a lot easier than most think.

IF you have some old  (as in no longer good) Octal base tubes put on a pair
of strong leather gloves (for the just-in-case) and then grip the envelope
in one hand and the tube base in the other. Gently try to twist the envelope
in the base.  You can actually twist quite hard if you don't grip too
tightly.

If that doesn't work, just put them in hot, soapy water and keep the bases
submerged as they cool.  Then try to twist out the envelopes.  You might
have to go back to hot water, but it's been my experience that many will
come out with very little effort even without the hot water treatment.  Of
course a lot of them will not budge barring an act of God, dynamite, or a
hammer.

OTOH I've had them come loose just trying to remove what had been a good
tube from the socket.


Roger Halstead (K8RI, EN73 & ARRL Life Member)
N833R, World's Oldest Debonair (S# CD-2)
www.rogerhalstead.com
> I have a 100 KHz crystal that I would like to mount inside of an octal
> base tube so I can just plug in into the calibration socket on my
> SX-111.  I'd like to remove the glass, place the crystal inside, and
> then re-install the glass envelop.  The question:  Does anyone have a
> neat way of removing the glass (without breaking it)?
> 73,  Skip  W7WGM
>
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