[ARC5] Crystals and WWII

[Kenneth G. Gordon]

On 16 Mar 2013 at 22:30, hwhall at compuserve.com wrote:

> I recall reading an old QST article, from the 1930's I think, that
> recommended grinding only on one side. A pencil mark was made on one
> corner of the unground side as an index. Then frequent micrometer
> readings were made and recorded as grinding progressed so one could
> see when parallelism was being lost and where to increase or decrease
> grinding to correct it. They seem to have put a lot of care into
> homebrewing crystals back then.

One of my favorites is the article that begins, "Take a block of quartz. Clamp 
it into your vise. Then get out your hacksaw...."