Re: Tesla myths corrected - Best text? (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 2 Nov 2007 22:34:32 -0600
From: Gary Peterson <g.peterson@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Tesla myths corrected - Best text? (fwd)

> The receiving length of wire including that to Earth seems to be perhaps 
> 1/5 of the distance away from the transmitting coil so of course it is a 
> huge antenna picking up standard EM radiation. . . . Like at 500 feet an 
> 108 foot earth wire was used.

The 108' given for the ground wire length is a typographical error.  The 
correct figure is 55'.

As for the possible reception of standard radio waves, the ground wire was 
lying on the ground in an orientation approximately on an extension of an 
imaginary line connecting the SSTC transmitter location and the well casing, 
and thus nearly at a right angle to the standard radio wave front that might 
have been present.  It can be assumed that the resonator itself was not 
receiving any significant amount of such wave energy, although it could have 
been acting as a loading coil for the short vertical conductor and elevated 
terminal above it.

> . . . and resonating the coil primary or secondary (they seem confused in 
> the description . . .

When speaking of a passive Tesla coil receiving transformer the helical 
resonator is referred to as the "primary" and the shorter coil of heavier 
wire as the "secondary."

> The fact that the radio receiver did not receive is not surprising when it 
> was already stated that "It is noted that the transmitter was almost 
> certainly out of tune due to instability of the pulse generator". . .

I went back and forth between the SSTC transmitter and the radio receiver 
during the time of the "radio-receiver-only-at-60-meters" observation to 
make sure the SSTC was in tune.

> . . . Depending on the type of MOSFET driver the frequency may be a fixed 
> oscillator . . .

The SSTC driver circuit  consisted of an inexpensive "Interdesign" 
square-wave pulse generator (see www.teslaradio.com/images/000_0221-1.jpg ) 
connected with coaxial cable to an H11L3GE optoisolator, connected to an 
IRF640 power MOSFET.  Please see www.teslaradio.com/pages/sstc.htm for the 
circuit diagram and www.teslaradio.com/images/000_0210-1.jpg for the old 
driver board itself.

> . . . or based on feedback from the secondary output and hence able to 
> vary.

Its interesting that you mentioned the feedback or regenerative type of SSTC 
driver circuit as this type might be found useful in the construction of 
active Tesla coil receiving apparatus.

> None of this proves Tesla type non Hertzian transmission . . .

That's right.  The fact that the radio receiver alone was unable to detect 
any "radio waves" at a distance of only 60 meters, means that much more 
aggressive measures have to be taken in the construction of the standard 
radio wave receiving antenna that is used to take the SSTC transmitter 
"standard radio wave output" measurements.  Then the Tesla coil RF energy 
transmission-reception test distance has to be extended out to at least a 
few wavelengths and the whole set of measurements taken again before 
anything close to a meaningful conclusion can be drawn.

Gary Peterson
P.O. Box 2001
Breckenridge, CO 80424-2001
Phone: 970-453-9293
www.teslaradio.com


> From: Peter Terren <pterren@xxxxxxxxxxxx>
> Subject: Re: Tesla myths corrected - Best text? (fwd)
>
> I thought this thread was closed.
> Again I dispute the interpretation of the "data" below . . .
>
> The receiving length of wire including that to Earth seems to be perhaps 
> 1/5 of the distance away from the transmitting coil so of course it is a 
> huge antenna picking up standard EM radiation and resonating the coil 
> primary or secondary (they seem confused in the description below).  Like 
> at 500 feet an 108 foot earth wire was used.
>
> The fact that the radio receiver did not receive is not surprising when it 
> was already stated that "It is noted that the transmitter was almost 
> certainly out of tune due to instability of the pulse generator". 
> Receivers are narrow band, crystal controlled selective receivers that 
> will only pick up a very small part of the EM spectrum. Depending on the 
> type of MOSFET driver the frequency may be a fixed oscillator (unlikely) 
> or based on feedback from the secondary output and hence able to vary.
>
> None of this proves Tesla type non Hertzian transmission (and no-one else 
> has in 100+ years either).
>
> Peter