Dansway,

On the large TPU how many wraps do you have per control coil? What is the resistance of each coil?

If you have 3 layers and 4 control coils per with a resistance of at least 1.5 ohms each, try connecting each layers control coils in series and then each layer in series with the next. Monitor the collectors (individually and in series). I am not sure what control circuits you are using but if you can put together a Bedini window motor controller, see diagram, use the feedback coil (if you have a 4 segment connect those in series as well) for the trigger, the results you get might interest you.

As a variation connect the control coils to bang against each other (polarities reversed so you have  N-N and S-S) and try using the control circuit again (you may need to rewire the feedback segments to adjust their polarities). Let us know what you get.

you can subsitute a NTE 123 for the MPS 8099 and use NTE 196 and 197 for the others (these are NPN and PNP audio drivers, good to 4 Mhz). DOn't forget to use a diode across the points C & D to shunt the BEMF. I tried it with and without and the transistors seem to handle it with out (so far).

Forgot to mention, omit the bridge rectifier, for now.

Quote from: Sauron on April 04, 2007, 01:29:50 AM
And so the question arises, bang the coils, or run them sequentially.
it's good to see we are moving ahead nicely again.

It is a question that gives me great pause.  Like the three, or is it four, macaronis twisting about their centers of gravity; I wonder if these points enter into the diameter calculation.

Folks begin to question the arc on which they planted their hedges when faced with the need to trim them down.  The height and the arc were previously derived together with all due giddiness.

@Starcruiser,

Thanks for the help.  I am working on several things and will also work the Bedini circuits into the tpu.
John Bedini should be working on Mark's TPU....!

~Dan

Quote from: Dansway on April 04, 2007, 06:44:33 AM
A few pics of me playing with my coils.
Playing with the freq's is fun and I do see resonant nodes with gain, but no fireworks yet.
Now to go about capturing the negative spike into a cap...   

~D

Hi Dan, nice coils.
it reminds me of the o'l days.
it has it all,

*3 coils one on top of the other.
*3 control wires all the way around.
*the control wires perpendiculair around the collectors.
*run in multiple segments.

only thing which was buggin me those day's was each segment could be fed with a collector section to help.... etc.

nice work men.

Turbo