3v OU Flashlight

[lost_bro]

Good Day All:

Ok, more info from the PDF I posted earlier:

Interestingly enough this dimensional resonance is famous for destroying ferrite cores.....

take care, peace
lost_bro

[tysb3]

@ TinselKoala
first you need to find core resonance of yours transformer. It could be between 1-3,5 Ghz.
second, you need to adjust (without load and LF switch )  HF generator to resonate the core in his resonance for minimum current draw (I don't remember maybe it could be about 1mA ) from power suply. then try to play with 1 diod on load.
all transistors and diodes need to be possibly highest frequency.

[lost_bro]

@ TinselKoala
first you need to find core resonance of yours transformer. It could be between 1-3,5 Ghz.
second, you need to adjust (without load and LF switch )  HF generator to resonate the core in his resonance for minimum current draw (I don't remember maybe it could be about 1mA ) from power suply. then try to play with 1 diod on load.
all transistors and diodes need to be possibly highest frequency.

Good Day tysb3:

What is the recommended method to use in order to *find* the core resonance?

take care, peace
lost_bro

[tysb3]

@lost_bro
you need to put some winds (not to much) on the core with connection from the middle  and connect "bottom" and middle wires to signal generator and "bottom" and "top" wires to oscilloscope. then it's need to put meander signal and seek smal "hills" on the top of meander. the frequency of these "hills" will be core resonance.  I think it's not only method but this is what I understand from Akula's conference.

[hartiberlin]

@ TinselKoala
first you need to find core resonance of yours transformer. It could be between 1-3,5 Ghz.

Hmm,
I think this is wrong.
We have here an audio frequency of about 6 to 10 Khz at play probably resonating the core in this
frequency range..You still can hear it...
So no Ghz are required...

Maybe via the spikes higher harmonics, but I guess this will not go into the Ghz range...

Although it will probably depend what ferrite core material you are using...
I wonder why TK´s core has such a low electrical resistance.

Normally Ferrite cores have much higher ohmical resistances....
We surely don´t want to have eddy currents inside the cores...

Regards, Stefan.