Joule Ringer!

[Mk1]

I got this form another source

Skaght at nrgtikforum

"      I'm getting the same effect by replacing the bifilar coil completely with a leaky capacitor. I put a ~50 nF cap with 20 MEG ohm resistance in parallel across it and the circuit works!!!! (although the fluorescent flashes a lot more) That's much easier than building a huge bifilar and you don't need any germanium diodes...

I will say that my fluorescent is not very bright, although it wasn't with my bifilar either...  "




He doesn't say how long it works , only Lasersaber could validate officially .

But my guess is that a coil with a high capacitance is needed .

Mark

[bolt]

I found it and without building anything other than SIM's.....The reason why caps and resistors work is because you are setting the DC bias level on the base of the transistor. However without a bifilar coil all you do is set the bias so it works and drains the cap so it works like a normal JT.

The only possible way is IF the bifilar really is adding energy back into the circuit. The diodes set the DC bias and using leaky ones acts like a zener but at 0.3v drop per diode to set the base. In reverse voltage spike the diodes conduct the other way and push the RE charge back towards the capacitor keeping it topped up. SO germanium diodes could be replaced by 1n4007's then set the bias on the transistor properly using resistors.

This is why if you hold the ends of the bifilar coil the light gets brighter as you push more current on the transistor base!

Now at this point we have to assume the bifilar really adds energy back to the system as he spent time already winding several versions and the large ones work best so there IS something going on.

More.......found out ONE 1n4007 should work unless it gets killed by over volts. Break the base and add proper biasing in there and a 100ohm resistor in series with the transformer trigger base lead.

[Omnibus]

So, why, then, he doesn't place the device in a Faraday cage as someone already suggested?

[bolt]

I believe this is the raw circuit.

[gadgetmall]

hey bolt . switch the Hv out and the top secondary connection . Hv out would be on top .