What do you see in the FTPU image?

[sparks]

  From Wiki:  Specially constructed wideband current transformers are also used (usually with an oscilloscope) to measure waveforms of high frequency or pulsed currents within pulsed power systems. One type of specially constructed wideband transformer provides a voltage output that is proportional to the measured current. Another type (called a Rogowski coil) requires an external integrator in order to provide a voltage output that is proportional to the measured current. Unlike CTs used for power circuitry, wideband CTs are rated in output volts per ampere of primary current. 
   Most current transformers dont have bailing wire going through their cores.
 

[otto]

Hello all,

just to add my 2 cents to the hmmmm.....lets say confusion:

are really MOSFETs needed to pulse a TPU?? or are only little transistors good enough??

Are even little transistors needed to pulse our TPUs or is there maybe a natural frequency or something else pulsating at 245kHz or as Bruce_TPU said at 222kHZ, or another, lower  frequency and we have only to amplify this vibration with a set of coils??

No, please not from power lines because I dont have them near my house.

Otto

[Grumpy]

Hello all,

just to add my 2 cents to the hmmmm.....lets say confusion:

are really MOSFETs needed to pulse a TPU?? or are only little transistors good enough??

Are even little transistors needed to pulse our TPUs or is there maybe a natural frequency or something else pulsating at 245kHz or as Bruce_TPU said at 222kHZ, or another, lower  frequency and we have only to amplify this vibration with a set of coils??

No, please not from power lines because I dont have them near my house.

Otto

I have used transistors.  Most switching devices can probably be used.

[Antimon]

Yes, you used transistors, but did it work? 

A.

[darkspeed]

At the base of the choke on top you can see two spade terminals spray painted black ,one wide - , and one narrow +. These appear to be part of the base that the choke is mounted on. These are the steel terminals that he sticks the magnet to. If one side ( not face ) of the magnet was south and one side was north when he attached the magnet it would bias one side of that choke ... or maybe there is another coil nested inside of the center of that speaker wire spool he used to build it.

it would be real easy to hide a 30-60khz ultrasonic mic in there and then choke it off at 35khz to get your feedback.

experiment for you.. take an old speaker and cut the cone and webbing so you can move the voice coil. no magnet on terminals and the coil moves freely, but place a magnet on the terminals and the eddy effects fight you from moving it fast.


ps:  http://www.cnn.com/2009/TECH/09/02/wireless.electricity/index.html


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