[Milsurplus] big crystals

[J Forster]

Bob Camp wrote:

> Hi
>
> As you go lower in frequency a crystal has to get thicker. [snip]
>
> Of course if you get low enough, you just use a bare quartz bar in a
> pine box. Take a look at an old GR 100 Kc standard if you ever get a
> chance ...
>
> Bob
> KB8TQ
>

GR actually made some crystals that were about 2" long, 1/2" - 3/4" wide,
and 1/4" thick. I think they were for a wave meter. I used a bunch of
them for spacers in an optical setup. Beautiful chunks of quartz.

-John