[JMS] How does one "grind a crystal" to change its frequency ?

[cwforever at comcast.net]

No problem.
-------------- Original message -------------- 
From: "Ken & Marie Toliver" <kmtoliver at marktwain.net> 

> Hello All: 
> I also have a number of those old crystals and would be nice to grind some 
> of them 
> and put them back in service. 
> Would you please forward a copy of this info to me? 
> 
> Ken Toliver K0GEI [JMS] member 
> 
> 
> ----- Original Message ----- 
> From: 
> To: "The James Millen Society Members Email Reflector" 
> ; "The James Millen Society Members 
> Email Reflector" 
> Cc: "Sherrill Watkins" 
> Sent: Thursday, May 31, 2007 10:19 AM 
> Subject: Re: [JMS] How does one "grind a crystal" to change its frequency ? 
> 
> 
> > Sherrill, 
> > 
> > I have an old flysheet from Bliley which describes the proper crystal 
> > grinding technique. 
> > 
> > I will scan it this evening and email it to you. 
> > 
> > Best regards, 
> > 
> > de WA1ISA - Peter Dehman 
> > -------------- Original message -------------- 
> > From: "Sherrill Watkins" 
> > 
> >> Friends and Members of the James Millen Society: Please be advised that 
> >> from 
> >> time to time, I see FT-243 crystals for sale in odd frequencies; i.e. 
> >> that 
> >> are outside of the amateur bands and of no use. Years ago, I heard that 
> >> it 
> >> was possible to "grind" a crystal to raise its frequency. Also, I heard 
> >> that 
> >> one could "rub" a crystal with pensel graphite to lower its frequency. 
> >> Yet, 
> >> I have never seen any article published in any major amateur publication 
> >> including various handbooks, or magazines such as QST, Electric Radio, 
> >> The 
> >> Old Timers Bulletin, etc. as to how this process is be performed. Can 
> >> anyone 
> >> refer me to a good source or explain the process in great detail? Also, 
> >> what 
> >> is meant by the term, "overtone" crystal? Thank you very much. - Sherrill 
> >> W. 
> >> k4own, member 
> >> ______________________________________________________________ 
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> > 
> 
> 
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