[Hallicrafters] Piesoelectric effect case in point.

[Richard Knoppow]

----- Original Message ----- 
From: "rbethman" <rbethman at comcast.net>
To: <hallicrafters at mailman.qth.net>
Sent: Sunday, January 02, 2011 12:50 PM
Subject: Re: [Hallicrafters] Piesoelectric effect case in 
point.


> Well, as Carl pointed out, first the proper spelling is 
> piezo.
>
> I can see this with quartz.  The 1950's Shure element is 
> one big slice
> of quartz.

    Neither "crystal" or ceramic microphones are made of 
quartz. Quarts is used in frequency control and filter 
crystals but the material in crystal microphones is 
"rochelle salt". The ceramic is another material but that 
_is_ related to the dielectric used in capacitors. All this 
infomation is available on the web.


--
Richard Knoppow
Los Angeles
WB6KBL
dickburk at ix.netcom.com