ENERGY AMPLIFICATION

[Jeg]

Hey guys
Thanks for the help

Google yes please, no problem with pm or in public also.
Dave thanks for the answer in Accula's thread. I 'll answer you here if you don't mind.

It's been a long time now that i use for primary in many applications the Radu Motisan self oscillator. I like it because consumption is very small just 10-15W for 200V peak to peak output at 50MHz. I used it for don smith experiments, and now i am looking forward to expand Don's technique with more secondaries than just two. Classical Tesla coil arrangement, just a primary oscillating AC VHF, and secondary in parallel resonance with capacitor.
It is just that i wanted to use the same technique for creating VHF at mazzilli's driver as it seems more compact and stiff. I believe that if you bring it in real resonance i.e oscillating at wire's own VH frequency, then the consumption will fall almost to nothing. With Radu's as i told you i need about 10-15w for this to happen. 48V dc, 200mA battery current consumption. An other reason that i want to test mazzilli is that both coils have the same feeding topology (drain feeding), while radu's one coil is feeding the gate and any mistake here leads to gate explosion. In mazzilli's topology, the mosfet's avalanche protect it from mistakes..   

Bob, no diodes between primary and secondary, only at secondary side as in Don's circuits. Each secondary works alone with only common the ground. So what i am looking for, is a way for a freely secondary resonance without one affecting the other..


ps. by trying to stabilize Radu's oscillator, the last few months i have burn more than 30 mosfets. To give you a small hint from my experience, when you hear a big bang, then gate is overdrived to more than 20V. When you just hear a whirling air sound and mosfet starts on fire, then it was current drain-source overdriving. The latter usually gives source pin melting.

[Google]

Hey guys
Thanks for the help

Google yes please, no problem with pm or in public also.
Dave thanks for the answer in Accula's thread. I 'll answer you here if you don't mind.

It's been a long time now that i use for primary in many applications the Radu Motisan self oscillator. I like it because consumption is very small just 10-15W for 200V peak to peak output at 50MHz. I used it for don smith experiments, and now i am looking forward to expand Don's technique with more secondaries than just two. Classical Tesla coil arrangement, just a primary oscillating AC VHF, and secondary in parallel resonance with capacitor.
It is just that i wanted to use the same technique for creating VHF at mazzilli's driver as it seems more compact and stiff. I believe that if you bring it in real resonance i.e oscillating at wire's own VH frequency, then the consumption will fall almost to nothing. With Radu's as i told you i need about 10-15w for this to happen. 48V dc, 200mA battery current consumption. An other reason that i want to test mazzilli is that both coils have the same feeding topology (drain feeding), while radu's one coil is feeding the gate and any mistake here leads to gate explosion. In mazzilli's topology, the mosfet's avalanche protect it from mistakes..   

Bob, no diodes between primary and secondary, only at secondary side as in Don's circuits. Each secondary works alone with only common the ground. So what i am looking for, is a way for a freely secondary resonance without one affecting the other..


ps. by trying to stabilize Radu's oscillator, the last few months i have burn more than 30 mosfets. To give you a small hint from my experience, when you hear a big bang, then gate is overdrived to more than 20V. When you just hear a whirling air sound and mosfet starts on fire, then it was current drain-source overdriving. The latter usually gives source pin melting.

Frm now on I will post no more unwanted info. No one appreciates real good intentions. I will rather PM to the person who needs.

[Dave45]

 

[Neo-X]

Any idea how to detect excess energy in induction coil? 

[Jeg]

Very helpful Dave, thanks! I already ordered the parts. I hope this week to implement this.
What kind of ferrite toroid you use so to handle those frequencies? I think i'll go with air core chock.