[Hallicrafters] SX-111 Crystal in a Tube

[Burton Pratt K4PRF]

One last comment about the crystal in a tube.  I had one that was
damaged in handling.  The crystal unit was dislodged inside the glass.
I tried to cut the glass envelope near the base but it shattered all
over the place.  I fixed the crystal unit taped a plastic pill bottle to
the base, turned on the SX-111 and lo and behold the thing worked fine.
It is still working after several years.

Burt Pratt  K4PRF

Bill Gerhold wrote:

> I would like to thank all for the emails about the SX-111
> crytal in a tube.  That is what I suspected but as I said,
> never seen by these eyes.
>
> Some of you described glueing the glass to the tube for
> various reasons, and I realized, that the one in my SX-111
> is glued to the bakelite tube base.
>
> Others stated the element is in a vacuum.  One respondent
> said he knew someone who cut the glass, repaired the
> internals and glued the glass back on.  I'm sure the vacuum
> was no longer there.
>
> How sure are we that the element is in a vacuum?  Does it
> require a vacuum to operate?  I don't believe standard or
> todays crystal packages are vacuum sealed.
>
> K2WH
>
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