Bloch wall disconnect and reconnect. The final design!

[giantkiller]

Built.
Going to raise the voltage across the coil driver to 250v. Currently @ 12v / 150ma is not enough to cross the air gap of L1 to L2 with a load.

The tank cap L2 is .047 @ 500v, the storage cap is 3900uf @ 400v. I see people using uwave caps. These don't have the storage capacity.

[starcruiser]

GK,

If this is an attempt a the Don Smith design the L1 tank is where the voltage builds until it reaches the breakdown of the spark gap which is rather low in voltage. The spark gap is used to isolate the primary tank from loading from the exciter ckt. the diodes are to convert the 3~9kv to pulsed DC. Could use a 555 timer ckt with a transistor and audio xformer to generate this off a 9v battery. A burnt fuse will provide the sparkgap.

Create a second tank with L2 and use the diodes to create the pulsed DC to step charge the large cap bank. The other transformer is nothing more than a isolation transformer. Use the ground connection to provide the electron source on the output side. Do not forget to tune the output for the desired frequency using a resistor.

[giantkiller]

Thanks. That is good thinking. I will only output power not control it in the last stages.
Your 555 circuit is a stun gun ckt. I am going to step back here and do a 555 to irf840 to ignition coil or flyback. I only need sine at the end which the xfrmr does. And I don't need anything huge on my bench at the moment. I am striving for variable freq utmost.

GK,

If this is an attempt a the Don Smith design the L1 tank is where the voltage builds until it reaches the breakdown of the spark gap which is rather low in voltage. The spark gap is used to isolate the primary tank from loading from the exciter ckt. the diodes are to convert the 3~9kv to pulsed DC. Could use a 555 timer ckt with a transistor and audio xformer to generate this off a 9v battery. A burnt fuse will provide the sparkgap.

Create a second tank with L2 and use the diodes to create the pulsed DC to step charge the large cap bank. The other transformer is nothing more than a isolation transformer. Use the ground connection to provide the electron source on the output side. Do not forget to tune the output for the desired frequency using a resistor.

[forest]

GK

I have corrected schematic a bit.

[starcruiser]

The L2 with a Cap will get you the sine or a close proximity and the output stage you are right, you do not want to try and control it there. The large Caps are for conversion.

A 555 Circuit is simple and easy, a simple audio xformer is something you have or can get from almost anywhere. If you need feedback remember to mod the 555 circuit to use a trigger coil near L1/L2 thus you get synchronicity.  Remember what Don Smith said it is simple, L1 and L2 are the magic with some diodes and a few cap's. The ground is the electron source. Just like lightening.

The other option is a blocking OSC which will train itself to the radiated field thus sync itself (if it is in proximity).