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

["Tesla list" <tesla@xxxxxxxxxx>]

Peter's right and it was my goof to let it through.  
Chip

---------- Forwarded message ----------
Date: Sun, 28 Oct 2007 13:02:09 +0900
From: Peter Terren <pterren@xxxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
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

> ---------- Forwarded message ----------
> Date: Fri, 26 Oct 2007 18:33:58 -0600
> From: Gary Peterson <g.peterson@xxxxxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: Tesla myths corrected - Best text? (fwd)
>
>> "In God we [trust]. . . . all others must bring data."
>
>     In regards to Tesla's assertion that the connection between a Tesla
> coil RF transmitter and a Tesla coil RF receiver is NOT by means of "radio
> waves," it turns out that TESLA WAS RIGHT.  The historical record shows 
> that
> wireless transmission that did not involve far-field electromagnetic
> radiation was achieved in 1899 over a distance of 16.1 kilometers (10
> miles).  Based upon the 100 kHz operating frequency that Tesla is known to
> have used at Colorado Springs (CSN, Sept. 7, 1899), this works out to a
> distance of approximately 5 1/3 wavelengths and thus fairly deep into the
> far-field zone.
>
>>> . . . Many of the members of this list are guys who build real things 
>>> and
>>> test them.  Hopefully one or more of them will take the challenge and
>>> perform experiments to confirm or refute the hypotheses in question. . .
>>> .
>
>     Here is some data collected using a Tesla wireless transmission and
> reception system that supports Tesla's assertion.
>
> July 27, 2002
>     A grounded Tesla coil RF energy transmitter and Tesla coil RF energy
> receiving transformer pair, previously constructed, was used to obtain
> signal-strength measurements at various distances of separation.  The 
> input
> to the transmitter's primary was .750 - 1 amps at 23.83 volts for an
> approximate transmitter power output of 17.8 -23.8 watts.
>
>     Initial tune-up was accomplished using an analogue volt meter and/or a
> small incandescent Xmas tree lamp connected directly to the receiver's
> secondary coil terminals.  The lamp could be made to glow dimly at 10.7 m
> (35').  A small permanent magnet dc electric motor with a full bridge 
> diode
> rectifier could be made to run at approximately half that distance.
>
>     At distances a little greater than 11 m a Fluke True RMS Multimeter 
> was
> used as an E-field probe to sense the pulsating electric field associated
> with the vertical conductor that connects the helical resonator to the
> elevated terminal.  A wire lead was connected to the V input of the meter
> and brought into close proximity with vertical conductor.  The meter's COM
> input was connected to a point in common with the bottom lead of the
> receiver's helical resonator at the end of a 58' ground insulated wire 
> lying
> on the ground and connected to a 20-foot steel water well casing.  With 
> the
> receiving transformer located at a distance of about 60 m (200') from the
> transmitter, a 204 - 230 mVAC reading was observed on meter (Al foil off 
> of
> roll = 34.9 cm (13.75")).
>
>     At the same distance of about 60 m. (200') from the Tesla coil RF
> energy transmitter, using a low frequency radio communications receiver 
> with
> an approximately 20' wire antenna plus ground, and with no with Tesla coil
> RF energy receiving transformer involved, no RF energy that was associated
> with the transmitter could be observed.  Future observations will be made
> with a longer antenna circuit that includes an LF antenna preamp and
> possibly a loading coil.  A tuned loop antenna will also be tried.
>
>     The Tesla coil RF energy receiving transformer was then moved to a
> position roughly 152 m (500') from the transmitter.  The resonator's 
> ground
> connection was made with a 32.9 m (108') insulated ground wire running
> across the ground to a 12.2 m (40') steel water well casing.  The V lead 
> of
> the AC volt meter arrangement described above was once again brought into
> close proximity with the above-described vertical conductor with ambiguous
> results.  The multimeter was then replaced with a low frequency radio
> communications receiver.   The wire lead (VAC) running to near the
> resonator-elevated terminal conductor was connected to one of the
> communications receiver's 300-ohm antenna terminals.  The ground lead was
> connected to the other 300 ohm antenna terminal (with the ground jumper in
> place).  With this arrangement an S7 field-strength reading was observed 
> on
> the receiver's field strength meter (Al foil off of roll = 24.8 cm 
> (9.75")).
> It is noted that the transmitter was almost certainly out of tune due to
> instability of the pulse generator.
>
>     With the Tesla coil energy receiving transformer located at a distance
> of approximately 1 km (.621 mi.) from the transmitter and the transmitter
> precisely in tune, an S5 field-strength reading was observed on the
> receiver's field strength meter (Al foil off of roll = 43.8 cm (17.25')).
> In addition to the field strength reading, a pronounced suppression of the
> background thermal RF noise was noticed
>
> Preliminary Conclusions
>     Given that a connection was established between the Tesla coil RF
> transmitter and the Tesla coil RF receiver, and that energy was 
> transmitted
> and subsequently collected at the receiving location that was in excess of
> 1/2-wavelength from the transmitter, while under the same Tesla-coil
> transmitter conditions a radio wave receiver at a much closer distance was
> unable to detect the transmitted energy, then empirical evidence exists 
> that
> the transfer of energy is not by means of "radio waves."
>
>     By the way, the ongoing investigations, partly described above, have
> demonstrated that Tesla was right in regards to another disputed physical
> principle, that is the capacity of an insulated spherical conductor in 
> space
> increases as a function of elevation above the earth's surface.
>
>
>     Transmitter Construction Details -- The transmitter's resonator has a
> 7:1 aspect ratio.  With the door-knob topload it resonates at about 185 
> kHz.
> With the 58.4 cm (23") diameter aluminum disk elevated terminal in place 
> the
> resonant frequency is measured at 107.83 kHz .  Frequency counter is a 
> Fluke
> True RMS Multimeter.
>
> Excitation circuit
> Interdesign square-wave pulse generator
> H11L3GE optoisolator
> IRF640 power MOSFET and associated circuitry
> 24 volt DC power supply (2 12 volt lead-acid car batteries)
>
> Primary coil
> coil form (spool): upper portion of a 5-gallon plastic pail
> Diameter: 29.2 cm (11.5")
> Length: 5.4 cm (2.125")
> Wire size: AWG #14, type MTW  THWN  THHN  AWM 600 volt
> Turns: 18
> Winding length: 5.4 cm (2.125")
>
> Secondary coil (helical resonator)
> Coil form: 3.18 mm (1/8") + cardboard cylinder with 2.38 mm (3/32") 
> acrylic
> ends, with a few light coats of polyurethane finish (Grace Ice & Water
> Shield cylinder)
> Diameter: 13.5 (5.3125")
> Length:  96.5 cm (38")
> Wire size: AWG #24 magnet wire (Nyleze)
> Turns: 1740
> Winding length: 95.3 cm (37.5")
> Inductance: 54.6 mH
> Resistance: 72.7 ohms
> Height of bottom turn above ground:  45.7 cm (18")
>
> Elevated terminal
> Aluminum disk
> Diameter: 58.4 cm (23")
> Thickness: 3.18 mm (0.125")
> Height above top turn:  2.48 m (97.5")
> Height above ground: 3.89 m (153")
>
> Ground terminal
> Two copper bonded steel rods, 1.71 cm x 2.44 m (5/8" x 8'), with 20.3 cm
> (8") spacing, driven into the water table at a depth of approximately 1.22 
> m
> (4') below grade
> Connecting wire: 4.27 m (14') AWG #10 (stranded) + 6.55 m (21.5') AWG #16
> cord
>
>     Receiver Construction Details -- A Tesla coil RF energy receiving
> transformer with widely-adjustable variable elevated terminal.
>
> Primary
> Coil form: Single layer of craft paper with 2.38 mm (3/32") acrylic ends,
> coated with polyurethane finish
> Form diameter: 27.9 cm (11")
> Form length: 45.7 cm(18")
> Primary wire size: AWG #22 magnet wire (Nyleze)
> Turns: 630 (approx.)
> Winding length: 44.5 cm (17.5")
> Inductance: 57.5 mH
> Resistance: 28.5 ohms
> Height of bottom turn above ground: 41.9 cm (16.5")
>
> Secondary
> Wire size: AWG #18 cord (closewound)
> Secondary turns: 18 (ends left open, i.e., diminutive lamp load 
> disconnected
> when E-field probe 'detector' is used)
> Winding length: 1.68", first turn starts 0.875" above lowest primary turn
>
> Elevated terminal ('curtain cap')
> Aluminum foil rolled on to a 7/8" wooden dowel
> Foil width: 18"
> Foil length: adjustable from 1.5" to 60"
> Maximum height above top turn: 1.88 m (74")
>
> Ground terminals
> 6.1 m (20') steel water well casing; 12.2 m (40') steel water well casing;
> municiple fire hydrant
> Connecting wire:  16.8 m (55') insulated AWG #14 cord.
>
> Regards,
> Gary Peterson
>
> Twenty First Century Books
> P.O. Box 2001
> Breckenridge, CO 80424-2001
> g.peterson@xxxxxxxxxxxx
> Phone: 970-453-9293   Fax: 970-453-6692
> www.teslaradio.com
> www.teslabooks.com
> www.teslascience.org
>
>
>> From: Peter Terren <pterren@xxxxxxxxxxxx>
>> Subject: Re: Tesla myths corrected - Best text? (fwd)
>>
>> Thanks Jim
>> Exactly the sort of information I needed.
>> Unfortunately I missed out on  the cheap pile of Tesla books including
>> Hulls notes recently.
>> I guess it's like the old saying
>> "In God we believe...all others must bring data".
>>
>> Cheers
>> Peter
>
>>> From: "Tesla list" <tesla@xxxxxxxxxx>
>>> Subject: Threadkill: Re: Tesla myths corrected - Best text? (fwd)
>>>
>>> I'm killing this thread as it indeed has diverged from the purpose of 
>>> the
>>> list, to discuss tesla coils, their construction, theory of operation,
>>> etc.
>>>
>>> Many of the members of this list are guys who build real things and test
>>> them.  Hopefully one or more of them will take the challenge and perform
>>> experiments to confirm or refute the hypotheses in question. 
>>> (Paraphrased
>>> from another poster, butchered by me.)
>>>
>>> Chip
>
>
>