Giantkiller moves forward into Full Heterodyning.

[giantkiller]

I have 3 fets driving 3 segments of the 1st layer. 100ohm 1/8 watt on the gates. 50 ohms 10 watts on the coil to +12v. The coil is on the drain and the source is ground.
the 3 freqs are around 100khz. The fets run run cool. 

The next step is to connect up the segments on the other layers in a spiral fashion and drive that. I need more fets or run coils in parallel.

I included a scope shot. The pulses are 14vdc. The output is +47volt height.

One thing I would like to know is what the height of the field is in comparison to the height of the pulse in volts.

--giantkiller. Another step forward.

[turbo]

 

[acerzw]

? ? Very Informative  A

[acerzw]

An Alternative, a frozen (solid state) one is better I have heard.

A

[sparks]

  @gk

      What is you signal input?  If your up round 100khz your not inputting  audio anymore.  I have a 24khz 100watt amp that was used for an ultrasonic cleaning tank.  (I have a 0-10k supply but the finals are blown and the eprom set up for 1k ac output)  The 24khz supply also has a freq.sweep of about 4khz so that should be intereting. The ultrasonic amp is pretty hardy.  I also have some piezo electric transducers but don't see a way to use them unless I rattle the krap out of the coil mounted on a plate in front of some magnets.