Re: 3 Coil System Was: A photographic tutorial ofPancakeCoilwinding...withmovies...(fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Mon, 25 Jun 2007 20:32:34 -0700
From: Barton B. Anderson <bartb@xxxxxxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: 3 Coil System      Was: A photographic tutorial
    ofPancakeCoilwinding...withmovies...(fwd)

Hi Dave,

Tesla list wrote:

>---------- Forwarded message ----------
>Date: Tue, 26 Jun 2007 10:27:43 -0500
>From: David Thomson <dwt@xxxxxxxxxxxx>
>To: 'Tesla list' <tesla@xxxxxxxxxx>
>Subject: RE: 3 Coil System      Was: A photographic tutorial
>    ofPancakeCoilwinding...withmovies...(fwd)
>
>Hi Bart,
>
>  
>
>>I'm not trying to do wireless power and I don't have the 
>>knowledge to say pro or con. But when it comes to practical 
>>EM theory, (for example when a coil is inductively coupled or 
>>not), then I'm there (mouth and ears open). That's what I 
>>enjoy, so there is where my interest resides.
>>    
>>
>
>Fair enough.  
>
>Here's a techie question:
>
>I have a really neat high voltage "video input" circuit from an old HP piece
>of test equipment.  There are two large capacitors and a cascade of
>resistors and a diode between them.  Essentially, it converts a high
>potential to a low potential.  What I want to do is use this circuit as an E
>field detector.
>
>I have a DATAQ DI-148U acquistion module, which I would like to wire the
>circuit output to.  My question is simple.  If I place a probe near the high
>potential resonator of the coil and another probe a given distance out, and
>connect one probe to each of the capacitors on the board, will I have a
>reliable measurement of the E field?  If so, how can I position the probes
>and calibrate this device to give a meaningful reading?
>
>Dave
>
No clue. The DATAQ DI-148U is a USB interface device I have zero 
experience with. To wire the device to the probes in question via the 
capacitors requires a schematic of the hv video input circuit. It may be 
possible do to what you want or it may not.

But, I can tell you that connecting a terminal (probe) to the hv 
terminal (even near), there is capacitive loading of the probe you'll 
need to account for. Maybe someone else on the list has a method which 
might work for you?

Take care,
Bart