Field Plots

[Glenn Baumgartner]

Hey any one WANT a sonograph.. got one in my hangar looking for a 
home..Think I have the manual also.. takers?
----- Original Message ----- 
From: "Phil" <philmt59 at aol.com>
To: "Tacos" <tacos at amrad.org>
Sent: Wednesday, July 06, 2011 5:11 PM
Subject: Re: Field Plots


> September 1977; Durham University, England; first Applied Physics lab as 
> an undergraduate. My lab partner and I were given bench space, a power 
> supply, a voltmeter (analogue, but FET front-end), some silver dag, a 
> paintbrush, and several eighteen-inch-square sheets of teledeltos paper. 
> Instructions: spend the next three hours painting a variety of 2D 
> electrode patterns on the paper, then map out the equipotential contours. 
> Was it a good practical? Heck, I can still remember the details nearly 34 
> years later, so it must have created an impression as least as great as my 
> wedding day.
>
> They don't make practicals like that any more.
>
> Phil M1GWZ
>
>
>
> On 6 Jul 2011, at 15:28, fgentges at mindspring.com wrote:
>
>> 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
>> _______________________________________________
>> Tacos mailing list
>> Tacos at amrad.org
>> https://amrad.org/mailman/listinfo/tacos
>
> _______________________________________________
> Tacos mailing list
> Tacos at amrad.org
> https://amrad.org/mailman/listinfo/tacos