Quote from: 4Tesla on June 09, 2011, 05:00:37 PM
I was wondering if anyone has tried the ferrite core in the C or D configuration.. if so, what were your results?

Thanks

@4Tesla
Mine is 'C' but not touching the magnet. Hope that helps.
chrisC

The driving coils have nothing whatsoever to do with any OU effect. They rely 100% on conventional understanding of electronics so no mysteries here. The ONLY thing that matters regarding the drive coils is they should present the most energy efficient method at spinning the rotor.... that's all! For every watt you waste here you have to find from out of your critical tuned  OU generating coils to cover the losses.

For large muller systems you can not beat RV 3 phase motor as a driver.  They can spin a 18" to 2ft rotor loaded with 1.5" neos at 3000 rpm on < 15 watts just by cleaning the bearings and taking off the fan at 120v.

With tailored frequency, amplitude, pulse width inverter drive they can maintain 3000 rpm at 1.5 watts or take the same rotor up to 9,000 rpm at 10 watts. I like to see your pulse motor do that:) These drive systems can yield several Kw's OU.

Quote from: chrisC on June 09, 2011, 08:08:26 PM
@4Tesla
Mine is 'C' but not touching the magnet. Hope that helps.
chrisC

I think that is what I'm going use also.

Thanks

Hello everyone,
Been working on my replication but im having trouble with the driving circuit posted by romero. First time i spun it up it ran but transistor got really hot and eventually blew. Rebuilt the circuit and blew another transistor. Tried three times now to rebuild the same circuit with a tip32c instead of tip42c (had a few on hand, ran out of tip42) but cant get it running. Transistor heats instantly.

Can someone confirm that romero's circuit works as posted? I'm getting really frustrated with it. Can anyone recommend another circuit to drive it?

On a side note, just like to say excellent work going on here and thank you to everyone for sharing there findings! And of course thank you to romero!!

The circuit is fine there are many many replications now with no driver problems so that means you are the only one to keep blowing transistors:)

You know its PNP don't you? Sure you not sticking volts wrong way or has you hall device melted and turning the transistors fully on?  Well put it this way if your are struggling with 2 components you never get the thing tuned and looped.