HIGH QUALITY TPU DVD Video Released from Jack Durban

[hartiberlin]

here's more info on my setup.    thanks for the suggestions eldarion

There are lots of effects happening so I'll just mention a few.

1)  Notice I use a diode to prevent the kickback from burning out my transistor and the energy that goes in the toroid basicaly gets wasted in the resistance of the windings, which is what I wanted  (later I will cycle back the energy)  Now, this was no problem as I was putting in very little power  (millivolts from my 8 AA battery stack, about 10 volts)  Everything runs cold like it did in other blocking oscillators I built before.  (I love these oscillators  )     
However,  when I adjust the pot just a bit more suddenly my 4Amp rated diode started smoking, transistor heatsink got hot as hell, but the waveform didn't change all that much at the collector of the transistor.   The input miliamps went up a bit but not that much, so somehow extra energy was kicking back, and I did notice my input voltage started to float a bit higher than 10 volts to 12 or so, as if the loading eased off.    All is very strange, especially that waveform.  I was thinking the same as eldarion that the transistor is not shutting off, but it seems to be and the "bridging" between the peaks is quite unexpected and unexplainable and seems to jump around in an orderly fashin as if it's due to some rotation perhaps (left to right drift across the scope screen).  I alway thought the DC got produced as a gradual rise in the waveform due to some rotation, and perhaps this is not quite it and I'm observing something else.

2) I was scoping the collector spikes and I started to move my magnet around.   when I placed it exactly at the symetry point (at 12:00 o'clock position up top) a DC bias appeared across all the spikes, maybe 5 volts or so.  That was very interesting as well.  The magnet is realy important.

3) Sounds are very interesting.  As I increase the frequency the scope and the sound confirm the frequency is going higher.  But when I approach this particular frequency where things begin to happen,  the sound seems to go lower, while the frequency (per the scope)  goes higher.  I also find this odd.

4) I placed a very high value capacitor (like SM uses in the LTPU, those yellow caps)  and I got very nice pure sinusoids at half the pump frequency, parametrically pumped.   But no strange effects.   So, this makes me think the secret lies with a particular combination of frequencies that hit some magical acoustic frequency of the core in conjunction to the parametric excitation and who know what else, perhaps a fluctuation in the magnetic field that surrounds us, or even NMR.    These devices sure need a lot of studying to find out exactly what is occuring.

Anyway, I will be changing the configuration and pumping the symetry coils and looking for a DC potential across the taps of it  (it's that finding the potential task).  This was what I was going to do in the first place as per the theory but I was just trying to get my oscillator going so I made this change and stumbled on this interesting interaction.

EM

EM,
great results !

So you say you used just milliamps at
10 Volts input,
so this is normally only less than 1 Watts or
even more less...
Then it should not get warm and also not smoke
at this power level !
You must have put put at least more than 10 Watts contineously to get it hot..

You really must have hit the right catalysation effect.

Please study it carefully and let us know.
Be sure to put a fuse in series with your transistor or coils...

Do you also have iron wire in your coils ?

What is your core you have wound it onto ?
Is this a ferrite core or just the output coil ?

Many thanks.

[EMdevices]

Hi Stefan, there is no iron wire, the only iron is the core, it is a roll of steel ribbon, found it on the ground close to the Shipping and Receiving area of a company, probably used to tie down boxes or wooden crates.
EM

[hartiberlin]

Hi Stefan, there is no iron wire, the only iron is the core, it is a roll of steel ribbon, found it on the ground close to the Shipping and Receiving area of a company, probably used to tie down boxes or wooden crates.
EM

Hi EM,
so are the single layers ofthis iron ribbon
isolated ?
Did the heat come from it or
from your transistor  or from your coils ?

What voltage and amps do you get at the output,
when the conversion process starts ?

Many thanks.

[EMdevices]

well, the ribon layers are not isolated, ( it was a long strip and I wound it up like a roll of tape.)  It was a bit rusty too, so I figure it's ok, the surface resistance should be high enough.

The heat came from the diode and the transistor, I did not touch the core. At the time I smelled the smoke, I was watching the scope and how the peaks were "bridging" together into long chains and the sounds where changing, all was very exciting, so when I smelled the smoke I quickly unpluged the battery and touched the diode and I got burned, thing was unbelivably hot.  Then I touched the transistor heatsink (coutiously this time)  and it was very hot as well.   Like I said, just a short frequency away the thing was running cold, and not just for a few seconds, for minutes.

As far as the "output"  I'm not sure what to call an output at this point I was looking to see what happens with the setup and if I can get parametric oscillations.  The briging waveform was a few volts, and depends highly on the polarity of the magnet to bias the core, if I reverse the polarity it's almost in the noise floor.   Magnet is key.    On the other hand,  in a later experiment I was looking at the bias winding, but this time a bit away from that specific frequency, and I could see spikes up to 60 volts, perhaps I'm writing from memory now and I'm mixing things up since the diode would short that out, but perhaps that's why it gets hot. 

EM

[wattsup]

Well I didn't want to wait any longer so I am starting to wind my toroid. I want to do some tests on flyback transfer and this can be done with this toroid and I'll use two microwave transformers, two diodes, one resistor on the base of one transistor. lol

I just took a photo to show any of you how to wind the toroid without creating a mess.

I just put a dent into each end of a piece of wood and rounded the edges so the wound wire would not create any bends. It is working out really great. Just release one wire length at a time on the wood via the red tape and start winding.