From: "Tesla list" <tesla@xxxxxxxxxx>
To: tesla@xxxxxxxxxx
Subject: Re: HV differantal probe?
Date: Fri, 31 Dec 2004 15:25:33 -0700
Original poster: Terry Fritz <teslalist@xxxxxxxxxxxxxxxxxxxxxxx>
Hi,
We tried to get some easy Differential probe going about a year ago.
However, it proved to be a daunting task and we never could get anything
to work well.
You can see the old files here starting with "DiffProbe"
http://hot-streamer.com/temp/
The first TL082 based one should work, but the bandwidth would not be very
high. The high bandwidth stuff was just about impossible to do in any
reproducible way. To much high voltage and too sensitive input
impedances. Trying to measure 20 volts riding on nasty 400 volt signals
is pretty hard. Then there is ringing and all that... I did get "one" to
work but it took hours of soldering surface mount parts to "tune" it.
Cheers,
Terry
At 02:20 PM 12/31/2004, you wrote:
Hi, I seem to recall something about a high voltage diffrental probe
someone on the list was making a long time ago, anyone still have the
schmatic? Im intrested in doing some SMPS work, and hence though it would
be a good idea to have a well designed diffrental hv probe for the
primary work so I don't fry my new scope, since tesla coils and smps
operate around the same freqency range, and something that can surive
being around a tesla coil can handle my smps :)