3v OU Flashlight

[avalon]

Hi Avalon,

Have you loaded the output coil with say a 10 kOhm or any suitable resistor? I would like to know what voltage level remains from the 560Vpp voltage and presently I have no means to repeat such test.  In your video the load was the 10x probe input impedance (maybe 10 MOhm//15 pF), right?  (the 5.1 Ohm resistor was floating in the air)

Thanks,  Gyula

@12k load - 78 V p-p (12.00V 10 mA)
@1K - 18V p-p (12.00V 9 mA)

~A

Update: With a 1K load the frequencies have changed. Now I have got the proper resonance back to [roughly] the same levels as before:
@1k load - 460 V~ p-p, (36V Cyc RMS), 12v 0.2A. No capacitors connected yet.

I am now sure I can get much better readings once the coils are LC tuned.

~A

[TinselKoala]

Got any NE2 neons?

[yfree]

Update: With a 1K load the frequencies have changed. Now I have got the proper resonance back to [roughly] the same levels as before:
@1k load - 460 V~ p-p, (36V Cyc RMS), 12v 0.2A. No capacitors connected yet.

I am now sure I can get much better readings once the coils are LC tuned.

This is excellent work, Avalon.
Would you  be kind enough to explain the role of the toroidal coil in your setup?
Thank you.

[avalon]

Would you  be kind enough to explain the role of the toroidal coil in your setup?

Just a choke.

~A

[gyulasun]

@12k load - 78 V p-p (12.00V 10 mA)
@1K - 18V p-p (12.00V 9 mA)

~A

Update: With a 1K load the frequencies have changed. Now I have got the proper resonance back to [roughly] the same levels as before:
@1k load - 460 V~ p-p, (36V Cyc RMS), 12v 0.2A. No capacitors connected yet.

I am now sure I can get much better readings once the coils are LC tuned.

~A

Thanks for testing it.  I think when the load resistor was 1 kOhm, the input current draw went up towards the 200 mA because of the normal  transformer operation (coils are on a common closed core).
If I saw correctly in the video, the core resonance occured around 17 kHz, right? 
Have you considered putting the transformer core onto a light, elastic material like a piece of sponge to support it, instead of the glass? I mean the mechanical amplitude at core resonance may get damped on the hard surface of glasstop, though the insulating tape you wrapped up the coils may help to avoid damping.

Gyula