Field Plots

[Karl W4KRL]

Frank,

Thanks for compressing that URL. I now notice that Bob Pease wrote that
article in 1994! The source he mentions is probably long gone.

Computer simulation won't replace the use of teledeltos paper in your Kay
sonograph but there are several freeware or trialware programs available
that should work for any orthogonal field such as electrostatic, magnetic,
and thermal fields:

http://www.vizimag.com/

http://tinyurl.com/3dg7ajd

http://www.femm.info/wiki/HomePage

I pulled out my original research paper and found Xeroxes of all the
Teleldeltos maps. It would be interesting to redo the work with one of these
modern simulators.

Karl W4KRL

-----Original Message-----
From: fgentges at mindspring.com [mailto:fgentges at mindspring.com] 
Sent: Wednesday, July 06, 2011 10:29 AM
To: tacos at amrad.org
Subject: Re: Field Plots

I had a problem getting Karl's url to work since the email software 
clipped it.  I finally got it and made a tiny url.  Go to

http://tinyurl.com/3vd52bg

This is one of Bob Pease's famous articles on one of so many fun subjects.

If anyone wants some sheets of teledeltos paper, I have a big stack of 
11x17 sheets.  Let me know and I can bring it to tacos.

I used a bunch of it on my Kay sonographs which is a great audio 
spectrum analyzer. (Also longer ago that I like to remember.) The 
original purpose of the paper was to use a stylus with several hundred 
volts of signal to burn the image pixel by pixel as the paper is moved 
underneath the stylus on a rotating drum.  On the rotating drum is a 
plated recording surface where you record the signal and then play it 
back during analysis.  It was a marvelous machine from "before computers".

Frank K0BRA