[ARC5] WHINK and crystals.

[Kenneth G. Gordon]

So far, activity with this crystal has remained high despite the etching.

I might add that although this particular crystal was a commercial job, made during WWII, 
dated 1944 on the case, and made by Standard Piezo, the crystal blank is NOT perfectly 
square! Not by a long shot! At least two sides have a pronounced curve to them, and it is 
very obvious that all edges have been hand-ground to a bevel.

These are some of the reasons I chose that particular crystal to etch. I figured I couldn't hurt 
it.

Yet when I first tested it, it had plenty of activity, and that has not yet fallen off.

I am quite surprised, but pleased.

More tomorrow.

Ken W7EKB