HIGH QUALITY TPU DVD Video Released from Jack Durban

[EMdevices]

Here's another image showing how simple a shape these parametrons can have.   They can make them with thin films or just plain iron wire, or the more typical toroid cores.  

I also found a patent where they imprint a magnetic domain region on a wire, and they can shift it back and forth along it's length.  It was used as computer storage memory.  Very interesting technology that somehow seems to have fallen by the way side, but I have a sneaky suspicion it's still being used somewhere.

I think a good strategy is to build one of these basic parametrons and hunt for resonant frequencies by changing the capacitor values and retunning the pump frequency. 

EM

[EMdevices]

And this is my test setup...

After I understand what really happens, I will then try to close the loop, by utilizing the same toroid core and placing a magnet on it to saturate it as well.  This will create harmonics due to the nonlinearity, which will achive the 2xF pump frequency needed (or a frequency doubler will work as well)

EM

P.S.   To explain the operation,  the copper helix winding along with the capacitor form a tank circuit that can resonate at a particular frequency labled "F".   The inductance of this winding is obviously dependent on the magnetic properties of the iron wire that forms it's core.   However, we will varry those properties by driving a DC and an AC current through the iron wire.  The DC current will shift the magnetisation of the wire close to saturation (and prevent hysterisis losses)  and the AC signal we use, called the pump frequency, will pump the system to resonate based on the principles of parametric oscillation.  Acordingly, the pump frequency needs to be 2 x F.

I should also mention that perhaps the iron wire and the copper coils can be interchanged, as can be the driving method (we can drive the helix coil instead)  There's many configurations possible, and I'm sure you can see the resemblance to the FTPU and LTPU.

[wattsup]

@EM

Good to see you back.

Are you preferring bare iron wire or tapping over the iron wire before making the 3 loops.

[BEP]

@EM

Glad to see we are looking at the real heyday of magnetics. I've enjoyed some similar reading.

Here is one you should find related. I posted it before but it was quickly labeled 'a short circuit'. I won't argue the point. If folks want to argue they can take it up with the British Royal Navy as there is where it was first used.

According to the information I found it was used as the sensing part of a circuit that came before SONAR. The fun part is the resonant frequency is that of the core material NOT the coils. My experiment was two such circuits back-to-back on a torid made of a coil of bailing wire. It sounded like the background sounds in an old black 'n white space invasion movie. Basically a ring multi-vibrator. Supposedly, if an object disturbed the ambient magnetic field, within range, it would cause the oscillator to change frequency.

BTW: the odd diodes in the wrong place that would seem also like a short circuit - on another thread.... remember diodes do not conduct in either direction until very shortly after voltage is applied. Lookup the curves. I'm going to build that one because it is just as likely to work as this one did.

[Earl]

evolution