Hi Itsu,
Has you have 2 coils with one with a metallic foil, may I suggest you to try this little kind of experiment with you own 'gears and stuffs' ? Perhaps something new?
Some results: Input: square wave. About 15 volts PK-PK. 50% DTC. 3W/220Volts Leds Bulb.
Bulb not connected (no load): 90 volts PK-PK. Across the 1 Ohm resistor : kinda sine wave. 240 mVolt PK-PK.
Bulb connected (with load): 80 volts PK-PK. Across the 1 Ohm resistor : kinda similar sine wave. 250 mVolt PK-PK.
Needs a very precise tuning. Freq from about 125 KHZ without additional cap to about 30KHZ. Does not work with cap > 20 nanoF.
Needs at least a double trace oscillo to make more precise measurements.
In this configuration, the circuit must be grounded (via the Grid). I have also tested some other configurations with success. Success = to get the Leds lighted (but not fully, indeed).
This CCT is the same as the one pictured in "principle_of_work_of_Kapanadze.pdf" See the attached file.
One picture from this document:
Cheers, Jean
Hi Jean, sorry for the late reply here, allthough we already had some PM's exchanged. I can see the resemblance with what we are doing with the Akula 30 circuit being the coil with the foil (capcoil) I still am looking for this specific (old) 220V/3W led bulb, so thats one of the reasons i did not start. What i did do is try to setup the experiment you mention on your website (see video and picture), so perhaps you can mention this website in a reply in case other wants to join in. I used an old 30mH coil which i had and wrapped a copper tape around it with a 2mm gap. Then i setup my FG and scope the way you describe and scanned for resonance. I found something around 810KHz in which my 20Vpp sine wave put in on the copper tape, outputs some 40V pp on the scope (unloaded). The thing i have problems with is the fact that i can not monitor the input (FG 20Vpp) because the FG ground is kind of floating and connecting the scopes ground lead will destroy this floating. Please confirm that i hooked up the FG and scope the way you describe on the website. Also confirm if the 30mH coil is ok, or if i need the 90mH mentioned. Video here: https://www.youtube.com/watch?v=YTSW9wsDE_8&feature=youtu.be Thanks, regards Itsu
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