From: "Barton B. Anderson"
Date: Tue, 04 Jun 2002 00:03:58 +0000
Subject: Re: [TSSP] Base Current Measurements
Hi Terry, Ok, thanks. Right now I'm trying to familiarize my pulse capturing abilities. This is one of those scopes where your arm it, set the trigger, V/div, etc.. through trial and error. It captures fine, however once it's captured, I can't seem to manipulate the waveform except x10 viewing and horizontal positioning. Basically, whatever you set it at is what your going to view. I'm starting with a low voltage. Assuming I had my scope voltage calibrated (I'll have to recheck this tomorrow night after work), I was on 2V/div and captured a waveform peaking right on 1 div. So that should be a 2V signal x 2 (terminator) is 4V or 4amps? I was getting some pretty good spikes (positive going spikes) and had to set the V/div down to grab everything on the scope. I'm definately seeing the base current on each break (running 240bps). I think I'm going to have to continue toying with the scope until I can find the best method and range. I may have to bring a scope home from work to get more control of the waveform. Lots of fun! Take care, Bart "Terrell W. Fritz" wrote: > Hi Bart, > > I guess I am not sure what you mean. Just grab the waveforms ;-) Maybe Paul > had some special conditions or something like that. > > http://hot-streamer.com/temp/PaulsQexp.gif > http://hot-streamer.com/temp/PaulsQexp-1.gif > http://hot-streamer.com/temp/PaulsQexp-2.gif > http://hot-streamer.com/temp/PaulsQexp-3.gif > http://hot-streamer.com/temp/PaulsQexp-4.gif > > http://hot-streamer.com/temp/Qvar/ > > Not sure if any of this helps. > > Maybe see: > > http://hot-streamer.com/TeslaCoils/MyPapers/modact/modact.html > > I think we are interested in the base current when a streamer discharges to a > grounded object. that should make all kinds of harmonics and stuff. > > Happy to know you are havign fun with the CT!! :o)) They are really cool > things! > > Cheers, > > Terry > > At 09:52 PM 6/2/2002 +0000, you wrote: > >Hi Terry, Paul, - > > > >Say, what is a meaningful method for base current measurements? I can't seem > to > >locate Terry's past measurements. The CT is working great, I just need some > >advice > >on what setup conditions should be (through a frequency path, voltage path, > >etc..). > > > >Thanks, > >Bart > > > >> At 06:53 PM 5/31/2002 +0000, you wrote: > >> >Terry, > >> > > >> >"Terrell W. Fritz" wrote: > >> > > >> >> Bart - I got the 2100 current monitor sent so It should be there late > this > >> >week > >> >> by priority mail. > >> > > >> >The Pearson CT and cable was waiting for me when I got home from work. > >> >Everything > >> >in perfect condition. Thanks for sending and also for thinking about the > >> cable. > >> >I'll be able to get going on some base current measurements this weekend. > >> >Any tips > >> >beyond the apnotes at Pearson? > >> > > >> >Take care, > >> >Bart > >> > > >
Maintainer Paul Nicholson, paul@abelian.demon.co.uk.