HIGH QUALITY TPU DVD Video Released from Jack Durban

[mikestocks2006]

Let me say this one more time,  there are no Mosfets, no transistors, no active components in the FTPU.

When the system "runs with gain" you don't need amplification, pulses or anything, it is SELF OSCILLATING if wired correctly for positive feedback.

EM

Absolutely correct. I don't thing there is anything more sophisticated than a capacitor in this entire device.

Yes, and for the shake of simplicity and ease of building, I tried the following KISS setup and it works!

First though, I had asked in a previous post if anyone knew whether depletion modes mosfets were available back in those days. No answers here, but jdurban had mentioned in his interview and on this board that, the parts were simple ones from RradioShack.

So I visited the local store and asked them. Only enhancement mode are available at the store and definitely no depletion mode back in the 90?s.

So back to simplicity in making a self oscillating system without any elaborate expensive circuitry, and it works!!!:

9 V alkaline battery

A reed switch from RadioShack Normally Open with a solenoid to activate the field and close the contacts) I took the reed out to examine, looks like a standard Hamlin one 500ma at 120V AC. MDSR-7  ? The activating solenoid is 12 VDC max at 11ma RadioShak part number 275-233 . The reed switch it self can operate 0.6ms rise, 0.2 ms release. as high as 5500Hz resonant frequency. What do you know! It falls within the 5-6Kh mentioned here for at least the first simpler tpu?s. AND is cheap and available at RadioShak
Only drawback is cycle life, few billion only so it would last maybe around 20 mins at that frequency. Does that sound familiar too in terms of time length?

A MAGNET! (an old ceramic one, either from Radioshack or Homedepot)
It is required to bias the reed, from NO to NC, so when current is applied the solenoid coil will nullify the magnet field effect and  the switch will flip open. (A self oscillating circuit).

Connections:
Battery pole one, to solenoid to reed to battery, all in series. The system buzzed and screeches nicely along.

Next added the following :

- Test resistors 1.1 K, 470, 47 as loads to see what happens on the output of a small toroid  used
- A small toroid from an old broken tape player.
No part number on it I could see, but dimensions are as follows:
Core (looks to be ferrite/ceramic) .5? od x .25 id x .20? height
Wire looks to be  copper enameled/magnet wire? 0.014 thick
12 turns on the left side, same number of turns on the right side

Next, all connections as above but added the toroid in series and measured the output on the toroid:

Open circuit output, overloads a digital voltmeter at 500 volts both DC and AC
1.1k load again overloads the meter at both AC and DC (500 max meter readout)
470 ohms load, it reads about 175-200 V both on AC and DC scale ( leads to confirm it is DC pulsed out). It is afterall DC pulsed in.
At 47 ohms it reads 8-9 volts again both on DC and AC scale.

Based on this crude setup and test, it appears that the voltage out is not linear to the resistor values and there must be at least some kind of spikes to overload the meter at 500V ( but it could be that the digital meter cannot cope well with high frequency readings and/or possible spikes?)

Maybe an analog meter is required or a scope for better observations?
If someone here can repeat this possibly with better instruments and get some results would be great.

Not sure what to make of the outputs, but one thing is confirmed:
To drive it at 5-6 KHz could be done very cheaply and easily and for that setup with a 9V Battery (or even smaller depending on magnet strength and position relative to the switch),  a Magnet, a common Reed Switch and few wires.

Thanks for all the posts folks. Great thread.

[Spider]

@mike

Very interresting experiment!!


Greetings Rene

[CodeWebs]

That is a very nice experiment mike.

I started with that idea a few weeks ago when I was home and played with different ideas until I came up with an interesting experiment; I wish I was around my experiments so I could give more detail.  I had it setup as attached, where I would place a magnet near the first reed switch in the right position to start both reeds oscillating.  The transformer I used was a basic one you can buy at radio shack (12V CT 450mA Standard Chassis-Mount Transformer with Leads) I believe was it.  I wired it backwards to get an increase in voltage in this test.  I used a single 9v battery as the DC power source.  The solenoid is insulated solid garden wire, with copper wire wrapped around the circumference.  The main reason I used this iron wire configuration was I could not use any measuring equipment to test the voltage on the output because it was way too high.  My oscilloscope showed what looked like 50v square waves on the iron wire that increased in frequency dependent on the number of turns of wire I used.  While I had an ammeter attached to the iron wire it read .03 amps, but one interesting thing I noticed was if I placed a single lead of an inductor of any kind to point A the amps on the iron wire jumped up to over 1 amp and the voltage didn't seem to change.  I don't have any input measurements and am not claiming anything even close to overunity but it seems like this could go somewhere.  Again though, I had to stop experimenting because I had to come back to college to get ready for finals and everything is at my house far away.  Since this experiment I've come up with a few more ideas dealing with feedback and only using one reed switch but have it used for both sides of the transformer.  I'll be continuing this route of experiments in 2 weeks but am stuck till then.  What would be the reason for the amperage jumping up when a single lead of an inductor (or even the center tap of the transformer as the inductor) is placed at point A?

[starcruiser]

you can throw a cap in there to slow the solenoid activation as well. lower frequency operation maybe a bit longer life.

[Dom]

@MIke and Codewebs......wow  cooooollllllllll, going to try it......TPU here I come, then this would mean that SM writing to Lindsay is somewhat authentic, he did say has anyone tried a simple experiment to produce kicks, with jumper leeds, A reed would look like one wouldn't it...
he thought of using same sort of principle in a solid state ring, wow.......

Something I did awhile ago, at least 2 years ago, where i utilized two reed switches and a magnet glued on a disk, this was to time activation of two solenoids, which would drive magnet motor, one thing that really fascinated me about this setup, was the bright blue-purpleish flash from the reeds, check this replication of mine, man those flashes were really nice to look at, never seen colors like it....

check out the first unit, there are 4 vids,
http://kundelmotor.com/replications/indexold.html

@Buzz  thanks mate.