Re: vibrating capacitor Electrometer design (fwd)

[Steven Roys <sroys@xxxxxxxx>]

---------- Forwarded message ----------
Date: Sat, 10 Jul 2004 20:57:15
From: David Dameron <ddameron@xxxxxxxxxxxxx>
To: High Voltage list <hvlist@xxxxxxxxxx>
Subject: Re: vibrating capacitor Electrometer design

Hi Ed,
If you bought the Amateur Scientist CD set, please look at the Oct. 1965
issue. Here a capacitor was made with a vibrating plate, so any charge is
converted to an AC voltage, by q = CV, where C varies with time.

Am bot sure how the charge can be separated from the drive signal with a
varicap.
-Dave D.

At 08:10 PM 7/10/04 -0600, you wrote:

>	I haven't looked at those links yet (will do, of course), but before I
>do I have a couple of questions someone here may be able to answer.
>
>1.  How about vibrating reed electrometers?  Anybody know anything about
>them.  Seems to me a very easy and cheap vibrating "reed" could be made
>with a small loudspeaker.
>
>2. Has anyone looked into using varicaps or the like?
>