Tesla's Magnifying Transmitter "Replications"

[Farmhand]

Here's a circuit that can be used for all kinds of pulsing duties,

It's a SG3525 chip it has alternating outputs capable of 230Khz each so about 460 Khz if used on the same coil alternately, I designed it to have drain and source terminals for each mosfet switch so they can be used in different ways, it also has a separate input for the coil power so the coils can be powered by more than the rest of the circuit, depending on the mosfets that could be 100's of volts.

I used a resistor array with three of the dip switch's to switch in lower value resistors to change the frequency range which is then adjusted through with a 50k and a 5k trimpot for accurate control of RT then I used the other three dip switch's for switching in different value timing caps for greater range control, the PW is adjusted by a 10k pot. This particular one has a frequency range of 16 Hz to 235 Khz per output or combining both outputs out of phase it can do from 32Hz to 470Khz. The pulse width is adjustable from 49% to nothing for the whole range i think, less than 1 us PW no problem.

In the labeled picture I have it configured with jumpers to fill the 1000uf cap during the first stage and dump it to a battery during the second.

Labeled circuit pic.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211242&sc=photos

Oscillator section photo

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211243&sc=photos

So basically this little board can pulse one coil or two or be a two stage cap pulser or beleive it or not an inverter as far as I can tell is not out of it's scope of duties. I'm sure i could think of some more things to do with it too.

And I just realised I do not have a drawing handy for it with the mods, so i'll have to get onto that and post it in here.

Here is the Basic circuit from 7imix in this post below.

http://www.energeticforum.com/144799-post124.html

I have entertained the thought that if I were to fill a cap with one fet in the first stage then use the energy in the cap to charge a coil the recovered magnetic field of that event could theoretically be returned directly to the source battery as the cap being the source of the current which created the field is decoupled from the battery and therefore a different source, the battery would also be idle. But it might not work just an idea.

Cheers

P.S. Study time for me, thanks again lamare, I'll start on that stuff now.

[lamare]

You may want to check out "The True Wireless" article by the great Master himself:

http://www.free-energy-info.com/TeslaTrueWireless.pdf

OCR'ed version: "The True Wireless" by Nikola Tesla

Also uploaded Tesla's "ELECTRIC DISCHARGE IN VACUUM TUBES" referenced above to my archive:

http://www.tuks.nl/pdf/Reference_Material/Tesla/Electric_discharge_in_vacuum_tubes%281891%29.pdf

[Farmhand]

This test was a bit of a fizzer but better than the last, this is about 40 or 50 meters. The transmitter is inside the metal clad bunkhouse/shed just to the right of and behind the coil, with the aluminium screen door closed the light was dimmer. Transmitting from inside a steel shed might interfere with it a bit. There's a 270 ohm resistor and 2 x 5mm LED's in series but no capacitor, maybe a small cap on the output might help, if I solder the cap the the LED's first then I shouldn't blow any LED's.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=2&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211283&sc=photos

Inside the hut the receiver held 4.9 volts over the LED's how i had it tuned and when I took it away it went down to 3.2 volts.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=2&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211282&sc=photos

I seem to have damaged my mosfets or something or the coils are affecting the circuit on the board because my drive signal is very ugly looking now.
Not sure what to do about that.

I'll make some change's and try again.

[Farmhand]

Hi all, the function generator arrived and being a cheap one it came with no documentation whatsoever no instruction, nothing not even one piece of paper.

Also it came with no output lead.

I guess i only have myself to blame. So anyway I was wondering if I could get some hints on how to set it up and soforth, I guess i will need a BNC lead or something for an output lead, I would like to use it in conjunction with a mosfet and mosfet driver to do the actual switching from the Function generator signal.

Here is some pics
Back https://skydrive.live.com/?cid=32a91...1280&sc=photos

Front https://skydrive.live.com/?cid=32a91...1281&sc=photos

Item on Ebay Function Generator 0.1Hz - 3MHz with AM/FM & VCF input | eBay

Any help appreciated, this is a new one on me it took me a couple of weeks to work out ow to use the scope.

Thanks and Cheers

[Farmhand]

While I was doing some pre testing messing about I noticed a strange effect.

I was lifting the top terminal free of the coil on the receiver with only a voltmeter on the output coil FWBR and I noticed a few things,

1. if I just touch the terminal the voltage go's from 42v to 90v.
2. If I lift it off the voltage go's up to about 200v
3. if I hold it just above the coil about an inch or so the meter go's out of range over 1000v, however doing that causes an increase in input to about 1 amp.

I probably wouldn't have noticed except for the little arc as I lifted the top off,https://skydrive.live.com/?cid=32a91...1279&sc=photos

I removed the pipe's from the tops too, for now.

I have no idea what this actually means. but I will try to figure some part of it out. Now i'm confused again so i'll just test it how it is. Then I guess I'll have to make some more terminals differently. Hopefully my function generator arrive's soon.

Oh and my motor circuit failed again but not the reed this time, it just stopped drawing current and slowed down. It was running at 30 rpms for a long time using 30 Ma a full sized bike wheel with 18 magnets, must be the slowest wheel ever.

Cheers

[Farmhand]

Hi all, No laughs for that video, ok then. I managed to get my motor circuit to work seems ok very efficient circuit but the reed is not the best and when I reduced the base resistance to zero it fused the reeds of course. My rotor is far from ideal though and bearing is not so good. I might try a hall if I can find one. if not I'll use another reed and the appropriate resistors.

I'm not able to repeat the 700 volt cap charge since playing with the tuning but I'm sure I can find it again soon, I was able to induce a similar effect with a bit less voltage through tuning but not the same, I might put that down to grabbing some of the 240 from the walls somehow.

Today i'll set up a long thick wire to act as a virtual ground, Cody demonstrated 80 meters, I don't think I have that much wire so I'll do what I can.

I also need to modify the toroid terminals a bit.

Cheers

[Farmhand]

Here's the video- YouTube - ‪700 volt cap charge.wmv‬‏

Sorry about the swinging the camera around again.

P.S. I was thinking maybe the voltage was fluctuating at over 500 volts because the dialectric in the caps was breaking down. If so

[Farmhand]

Thanks Monsieur, I realise the math is very important, but you're right I have an aversion to it. It's just no fun ! I will need to try to understand as much as I can though to have more fun.

Edit. here is the receiver outside next to the water tank lighting a fluro.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#!/?cid=32a91e5c9dcce17f&sc=photos&uc=1&id=32A91E5C9DCCE17F%211199!cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211278&sc=photos

P.s. Mosieur I was thinking of a soccer ball size. I might want to keep it, the ball and the antenna.

[MonsieurM]

Thank you Farmhand for taking the time to experiment some of my ideas

in the meantime, although i know you seem to have an aversion to math (like me ), i found this about self resonance, hope this helps you

Check this out

coil self-resonant frequency estimation, theory, and history

coil self-resonant frequency estimation, theory, and history

Hi Ed,

Mark R. posted the self capacitance formula due to Medhurst
in a previous post. If you use this formula in conjuction with standard
inductance formulas for soleniods (like Wheeler's), you can compute
the self resonant (no top terminal) frequency of most coils. I have found
that it works very well for predicting most of Malcolm's measured
frequencies.

If you want to read a little more of Medhurst try:
"HF Resistance and Self-Capacitance of Single-LAyer Solenoids" by
R.G. Medhurst, Wireless Engineer, Vol 2, p35, Feb 1947
*Note: the range of frequencies he used does not allow his Q formulas
to work at normal Tesla coil frequencies.


If you are just interested in computing self-resonant frequencies
there is another method which I have found useful and generally accurate
to about 10% for all coil sizes - space wound or not. Its limitation is that
it probably shouldn't be used for aspect ratios (Height/Diameter)<1 due
to the assumptions of the original derivation.

The formula is:
(1/5)
29.85 x (H/D)
F = -------------------
N x D

(hope the ascii came out)
where
F= self resonant frequency in Mhz of an 'isolated' coil
H= coil height in meters
D= coil diameter in meters
N= total number of turns

Make sure the top line reads " (H/D) to the 1/5 power"
Note that the frequency is a very weak function of the
aspect ratio (H/D), but a fairly strong function of the number of turns
and the diameter.

This is an adapation of the formula for Helical Antennas found
in Reference Data for Radio Engineers as well as in the section on
slow wave structures in "Fields and waves in Communication Electronics"
by S Ramo, J R Whinnery, and T D Van Duzer. A form of this equation also
appears in both of the Corum brother's books:
"Vacuum Tube Tesla Coils" and "TC Tutor"

Incidentally, the Corums incorrectly attribute the analysis of the helix to
Kandoian and Sichak. These guys actually just made a simplification of the
formula reported earlier by JR Pierce (1947) and Franz Ollendorf (1925)
and even more amazing : Pocklington (1897) (see below).

ps: a tennis ball does not deflate

[Farmhand]

Thanks lamare, I'm in a good mood I have a hilarious video soon, uploading now.

Next video should make anybody laugh.

I was testing the receiver output (low voltage winding) for a cap charge from the FWBR so I might try a motor energiser powered from it and I was surprised to see 780 volts and over on the 2 x 2.2 uf caps in parallel so I shorted them and they fill fairly quick they are rated to 275 volts AC. The voltage level seems to fluctuate in the caps for no reason too very strange, but shorted they go bang. Funny thing happened with the current draw aswell. I explain what I think in the video. Some load equals less current draw.

This is the crazy circuit I came up with to go on the output, I think i'll need an SCR instead of a mosfet. Or a voltage regulator. I realise the reed will have to placed correctly and I think it should go before the coil, I just drew it funny.

https://skydrive.live.com/?cid=32a91e5c9dcce17f&sc=photos#cid=32A91E5C9DCCE17F&id=32A91E5C9DCCE17F%211277&sc=photos

This drawing is inspired by Slider and the Muller dynamo thread, bt I only have an old wheel to use.

Monsieur I will most likely need to get a ball to wind the spherical antenna on in two pieces. I'll try it as soon as possible.

Cheers

[MonsieurM]

I don't have the time to check this out now, but you may want to check one of my previous posts out, about bifilar coils, etc:
http://www.energeticforum.com/115135-post1341.html

will do

[lamare]

Thank you for your quick reply, the reason i was asking, was because of this doc (see link page 2), in which you see an illustration of a Caduceus coil being discussed by Tesla

http://energythic.com/usercontent/3/_s_writtings_VacuumTubes_TopEnergia_Electric_discharge_in_vacuum_tubes.pdf

I don't have the time to check this out now, but you may want to check one of my previous posts out, about bifilar coils, etc:

http://www.energeticforum.com/115135-post1341.html

[MonsieurM]

Thank you for your quick reply, the reason i was asking, was because of this doc (see link page 2), in which you see an illustration of a Caduceus coil being discussed by Tesla

http://energythic.com/usercontent/3/_s_writtings_VacuumTubes_TopEnergia_Electric_discharge_in_vacuum_tubes.pdf

[lamare]

Lamare, in the following picture, is that a caduceus coil



Thank you for your reply

No, I they are representations of energy flows in the shape of standing electro-magnetic / electrostatic waves:

The energy of this standing wave is refracted thru the coupling transformer thereby exchanging energy with the other standing wave as shown schematically in figure (7). It can be seen that the T.M.T. involves three distinct standing waves in its operation, each coupled to the other thru two points of refraction. Each of these standing waves represents a distinct dimensional aspect

[MonsieurM]

Lamare, in the following picture, is that a caduceus coil



Thank you for your reply