3v OU Flashlight

[TinselKoala]

Cool TK, looking forward to your results.

My results on that are that the chip doesn't like very small inductances, evidently, and it's even really hard to make coils that low on the ferrite I'm using anyway. But this is not the final word on small inductances yet.

[TinselKoala]

I'm willing to try just about anything.

Slotted bobbin:

[MileHigh]

I think it was either Itsu or Hoppy that tried tests with and without the "magic capacitive copper band" and saw NO DIFFERENCE.

It was a thrill for me to see someone made a proper A-B comparison test like that.

IMHO the copper band is all part of the "secret sauce" not for the possible over unity, but to DRAW PEOPLE IN - A HOOK.

The real vortex technology in action.  (Try listening to "I Want You Back" and "ABC" by the Jackson 5.)

[TinselKoala]

Yep, thanks for that reference MH. Special pleading, post hockery unless demonstrated otherwise.

Nevertheless I am proceeding forthwith.

The inner winding: One layer of #27 on the slotted brass tube, black wire connected to tube and start of winding, yellow wire connected to slotted outer foil and end of winding. With and without closed ferrite inserted (still has very thin mica original spacer in the square part). Gapped ferrite will come in somewhere between these values.

[d3x0r]

Yep, thanks for that reference MH. Special pleading, post hockery unless demonstrated otherwise.

Nevertheless I am proceeding forthwith.

The inner winding: One layer of #27 on the slotted brass tube, black wire connected to tube and start of winding, yellow wire connected to slotted outer foil and end of winding. With and without closed ferrite inserted (still has very thin mica original spacer in the square part). Gapped ferrite will come in somewhere between these values.

that's on 2mH?  (the glare on the scale is kinda bad )


Nitpick; the foil winding is the outside winding.... (the other coil is under it... ) also I think maybe the side /direction of that winding matters...


the outside foil should be essentially opposite the wire windings from the connecting point to the other side... the inner side should be essentially a continuation of the winding... so both the outside and inside foils are connected on the same edge relative to their gap (if it's the left side of the gap on the bottom, it's the left side of the gap on the top)


foil - coil connected to foil's - coil - foil