Skycollection's "Pentafilar Pancake" inductively coupled "Overunity Potential".

[Vortex1]

Hi Vortex1. I would like to test with the multivibrator circuit you showed as well.
Do you have any suggestions for efficiency improvements for this circuit?
All the best...

.

Before you get into improvements you need to define the goal or end use of the device you want to build. When all the required parameters the device are noted, that is usually the stating point for the design.

Then some tailoring can be looked at. I recommend getting very familiar with the circuit and the effects of changing values. Keep a log of coil inductance, R1, R2 values, and log overall efficiency by measuring power input and power output.

Be aware that the transistors may vary in current gain,  so you may get different results from batch to batch. If possible measure the transistors gain then you can easily compute the compound gain of the two devices and set inductor ramping current with R1//R2.

Read the transistor data sheets. If you want to operate at higher voltage input and / or higher power, you may need different transistors.

The circuit can be made to switch faster with a little speedup network (RC) across R2, sometimes just a small capacitor across R2 is all that is needed.

More to come

Regards
Vortex1

[Vortex1]

hi Vortex1,

I agree with you since i am using this similar  model LC200A a cheap and reliable L/C meter which produce accurate reading.
Optional-I merely modified the wire to thicker transparent audio wire of the same length along with new plug for L/C meter.

That's a good idea, the leads and connectors are not the highest quality and can be upgraded.

[Void]

@SkyCollection. Thanks for the reply. See the attached diagram of a quadrifilar pancake coil
as designed by Arto Juhani Heino. Is this the design you are using for your quadrifilar primary pancake coil?

@Vortex1. Thanks for the preliminary info on increasing efficiency of the multivibrator circuit.
I hope to find some time this weekend to breadboard it and do some initial tests.

All the best...

[skycollection]

VOID, i have other configuration, Heino have four wires in the pancake coil at the same time, my configuration is the same if i put the four pancake coils in parallel...!

[skycollection]

Vortex1 with the R2 220K resistance, it doesn´t work, the ceramic small condenser is fantanstic...!