[Elecraft] Crystals and ARC5s

[N2EY at aol.com]

In a message dated 6/16/07 5:05:09 PM Eastern Daylight Time, AJSOENKE at aol.com 
writes:


> Then  we'd disassemble the xtals and 
> soak em in acid for a few minutes to tweak them  up 3 or 5 KC. 

What sort of acid?

The only acid I know that will etch acid is hydroflouric acid, (HF) which is 
incredibly dangerous stuff.

There's a solution of ammonium biflouride that can do etching, which is not 
nearly so nasty as HF - is that what you used?

73 de Jim, N2EY


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