An incand ring for a SF A2, is that possible?

ma tumba · Aug 24, 2014

I recently got an a2 with a strion socket and calypso ii ring with those great warm white leds. This combo is just awsome.

But I am kind of becoming a true incand fan so I am wondering if anyone has discussed the possibility of making an incand ring to replace the LED ring? Physically, 3 minimag xenon bulbs would fit just fine and their lumen output would be right, too.

scout24 · Aug 24, 2014

I wonder if one of Koala's onion rings would work? The LED's are user changable, so that's easy. The limiting factor may be the max drive level of 35ish ma on his rings. Maybe he can bump that... Any idea what the minimag amp draw is? Even the Solitaire bulbs may work. Interesting thread idea!

ma tumba · Aug 24, 2014

minimag 2xAA bulb seem to draw about 0.5A (see here https://www.tessco.com/products/displayProductInfo.do?sku=314459)

Illum · Aug 24, 2014

Lamps that small..... besides a midget flange there's lead types that can fit in the T1-3/4...
http://www.digikey.com/product-detail/en/683/CM683-ND/123089
http://www.surplusgizmos.com/T1-34-5mm-White-Incandescent-Light-Bulb_p_2406.html

Only problem is incandescents don't seem to be very sociable with CC drivers.

Koala's socket has the pins spaced out at 0.1" or about 2.5mm. You're going to break more minimag lamps trying to get it to fit then getting any useful output. Plus maglight incandescents at that level driven at correct levels blacken almost in one use. :ohgeez:

AnAppleSnail · Aug 24, 2014

Filaments don't do well in groups. The efficiency of a filament is roughly proportional to voltage. Can you instead use a resistored tailcap on a single filament bulb?

ma tumba · Aug 25, 2014

It just occurred to me that the native regulator of an a2 produces 4.5V that is right the voltage for 3 solitair bulbs in series. So it may be a purely passive mod so that the ring with 3 bulbs is powered first and then the same 4.5V are supplied to the main bulb.

An incand ring for a SF A2, is that possible?

ma tumba

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scout24

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ma tumba

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Illum

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AnAppleSnail

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ma tumba

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