Field Plots

[fgentges at mindspring.com]

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


On 7/5/2011 11:27 PM, Karl W4KRL wrote:
> Phil,
>
> You are close to the source:
> http://electronicdesign.com/article/analog-and-mixed-signal/what-s-all-this-
> teledeltos-stuff-anyway-12594.aspx
>
> I had a summer job at the Westinghouse R&  D Center in Pittsburgh longer ago
> than I like to remember designing a variable reluctance motor. I used
> teledeltos paper and a VTVM connected to a straight pin to map out the field
> lines at various positions of the motor.
>
> Karl W4KRL
>
> -----Original Message-----
> From: Phil [mailto:philmt59 at aol.com]
> Sent: Tuesday, July 05, 2011 6:47 PM
> To: Brian Hawes
> Cc: Tacos
> Subject: Re: Field Plots
>
> Whatever happened to Teledeltos paper?
>
> Phil M1GWZ