Author Topic: Quadfilar A.C. JT. (Read 8974 times)

synchro1 · « **on:** September 16, 2012, 12:01:37 AM »

I attached a very helpful page on the voltage potential of the Tesla Coil from Xee2. One can see the stored charge is 250,000 times greater in Tesla's bifilar then a standard coil of equal size. I hope he can begin to post to the new thread here at Overunity.

Here's the opening topic sentence:

"2 bifilar Jule Thief coils twisted into a spiral air core torus will output inverted A.C current from the secondary coil at twice the voltage of the pulsed D.C input to the primary. Two skiens of Radio Shack 2 wire speaker wire works well for this kind of A.C. Jule Thief Quadfilar".

synchro1 · « **Reply #1 on:** September 17, 2012, 05:36:06 PM »

Here's a schematic from Jeanna's "Joule Theif A.C. secondary pickup" thread. One can see at a glance that Jeanna's wraps are around a ferrite core. The Quadfilar Spiral is coreless with an aircore that works off self inductance between the wires alone. That amounts to a major and much simpler difference.

synchro1 · « **Reply #2 on:** September 17, 2012, 06:09:36 PM »

Here's another look at JonnyDavro's Piezo A.C. inverter circuit. Notice his costly ferrite core "mains" transformer. How much simpler and cost efficient would the coreless double wind be?

http://www.youtube.com/watch?v=vQglZZB5LLw&feature=plcp

e2matrix · « **Reply #3 on:** September 17, 2012, 07:53:57 PM »

Quote from: synchro1 on September 17, 2012, 06:09:36 PM

Here's another look at JonnyDavro's Piezo A.C. inverter circuit. Notice his costly ferrite core "mains" transformer. How much simpler and cost efficient would the coreless double wind be?

http://www.youtube.com/watch?v=vQglZZB5LLw&feature=plcp

I built his Peizo circuit last night almost exactly as he showed. It works and I lit a 120 volt LED light bulb that uses 3 high power LED's rather than a bunch of 5mm LED's. My transformer was only a 24 volt to 120 volt type from a UPS but it still hit 70 volts at around 5KHz which was enough to light that bulb quite bright. I was consuming 3.6 watts at the input. Output was using about 2.8 watts. Neat little circuit and interesting way to get the oscillation with the Peizo (but with mine a bit annoying as it was a bigger and more audible one).

Oddly the single 5mm LED across the transistor never lit and I even reversed it to make sure I had it right and tested it later across 4 volts to make sure it was good. I was also able to run the setup from a small 9.6 volt Nicad pack (looks like a pack of AA's).

synchro1 · « **Reply #4 on:** September 17, 2012, 08:00:07 PM »

@e2matrix,

Jonny Davro's A.C. LED could run with a Quadfilar Inverter Spiral Coil ringed around the screw base. The Piezo buzzer, transistor and tiny battery can all tuck in neatly under the bulb base. This beats trying to hide a bulky five pound ferrite core transformer.

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Author Topic: Quadfilar A.C. JT. (Read 8974 times)

synchro1

Quadfilar A.C. JT.

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