Contemplating SST-90 build! wacha think?

[h22]

Was thinking of building a SST-90 ( or possibly 50 ) using this head http://www.lighthound.com/Lumens-Factory-P7-M-Head-Assembly_p_3248.html (A P7 surefire "M" replacement ) and a leef body.

This would be more expencive than a Mag-mod, but far more robust!

So.... questions are:

Is there a huge physical differance between the P7 and SST-90?

What driver board would be recomended? (if I recall, The P7 is a sieries multi emmitter and requires more voltage.... am I correct here?).

If anyone has played with swapping out a P7 for the either of the SST's could you give me some insight?

If I have remember all the specs correctly, the SSt-50 would be roughly ths same output as the P7, just a single die pattern.

If a SST-90 could be built to pump out 2000+lm :devil:, That would be a sweet yet portable CANNON!!

 

[Cavelightchris]

Well according to the chart on here, it can put out 2250 lumens at 9.0 A:

http://www.luminus.com/stuff/conten...3_sst_90_w_product_datasheet_illumination.pdf

From what I read about the SST-50, it's capable of 1250+ lumens when driven to 5.0 A:

http://www.luminus.com/stuff/conten...2_sst_50_w_product_datasheet_illumination.pdf

 

[h22]

Well according to the chart on here, it can put out 2250 lumens at 9.0 A:

http://www.luminus.com/stuff/conten...3_sst_90_w_product_datasheet_illumination.pdf

From what I read about the SST-50, it's capable of 1250+ lumens when driven to 5.0 A:

http://www.luminus.com/stuff/conten...2_sst_50_w_product_datasheet_illumination.pdf

Thanks, was just looking at the 90 spec sheet, And found a few threads on Mag-mods that are pushing well past 9 amps...

The 50 would be alright, but as far as an " upgrade" to the P7 already mounted in the head, its not as sexy. A P7 will do almost what the 50 will, granted the 50 should have a better patern, being a single die.

If a SST-90 were put in and powered by 3 Nmh cells, ( providing adequate current and low voltage drop ) it would make for a super simple direct drive....
If i read the specs on the Leef tubes correctly, they will fit a C sized battery. I've seen C sized NmH cells advertizing 6000mah, so at 1.5C that would be ~30-45min of massive light output. providing the temp stayed down, wich i highly doubt!

 

[Nightray]

Just got my SST-90 (W57S-F11-GN200) from Avnet. Tried it direct drive with a few battery configurations to see what would happen before deciding which host it would live in. Here's the subjective results with only eyeball to judge brightness.

1 CR123A = no light (edit - dim light)

1 gray Trustfire protected 16340 = bright light
2 gray Trustfire protected 16340 parallel = very slightly brighter than single cell

1 blue Trustfire protected 18650 = bright light, slightly brighter than 16340
2 blue Trustfire protected 18650 parallel = very slightly brighter than single cell

2 Eneloop in series = no light
3 Eneloop in series = slight flicker
4 Eneloop in series = brightest of all tested

 

[h22]

Just got my SST-90 (W57S-F11-GN200) from Avnet. Tried it direct drive with a few battery configurations to see what would happen before deciding which host it would live in. Here's the subjective results with only eyeball to judge brightness.

1 CR123A = no light

1 16340 = bright light
2 16340 parallel = very slightly brighter than single cell

1 18650 = bright light, slightly brighter than 16340
2 18650 parallel = very slightly brighter than single cell

2 Eneloop in series = no light
3 Eneloop in series = slight flicker

4 Eneloop in series = brightest of all tested

Very usefull, thanks.
I am wondering if the li-pos were protected? it would be good to see amp draw as well!

My thought's are that C sized NMh might do the trick, 3 @ 3.6v is right in there as far as the 90's voltage range, however I'm pretty sure there would be some voltage drop! 4 in series would definatly do it in DD but would it the emmitter hitting it with 4.8+v?
The Leef bodies are designed to carry 26mm ( C sized?) batteries, and this would allow nice long run times. While a MAGmod is cheeper and offers more flexibility, I want mine to be built like a tank!

 

[h22]

What 18650 cells were you using? last I read the best cells for high C were the AW2600ma, but they were <6 amps....


in any case please keep me informed on your progress! thanks

 

[Nightray]

Edited original post with specifics.

2.5A measured with the 4S Eneloop.

Now, my question is, what's the ideal serial/parallel configuration to drive it harder? Will this bring it to 7.5A?

3 Parallel of (4 Serial) like this...

|-----------------------(SST-90)---------------------|
|+(Eneloop)-+(Eneloop)-+(Eneloop)-+(Eneloop)-|
|+(Eneloop)-+(Eneloop)-+(Eneloop)-+(Eneloop)-|
|+(Eneloop)-+(Eneloop)-+(Eneloop)-+(Eneloop)-|

Or, 4 Serial of (3 Parallel) like this...

|--------------------------------(SST-90)-------------------------------|
| |+(Eneloop)-| |+(Eneloop)-| |+(Eneloop)-| |+(Eneloop)-| |
|+|+(Eneloop)-|-+|+(Eneloop)-|-+|+(Eneloop)-|-+|+(Eneloop)-|-|
| |+(Eneloop)-| |+(Eneloop)-| |+(Eneloop)-| |+(Eneloop)-| |

Futile attempt to do ASCII art when the spaces get automatically removed.

I guess the first question is how to indicate serial/parallel configurations with text : )

 

[Nightray]

Shortened test lead and now I'm getting some light out of the CR123.

Looks like voltage drop across even short sections of wire are making a difference.

 

[Airsick]

I am running 3 sub C /Elite 5000 in a Mag direct drive and seeing 11 amps just off the charger. After they sit a while it will hit 9.5 amps and taper down from there. NiMH hobby cells are cheap and hold up to the amp draw very well.

 

[h22]

Shortened test lead and now I'm getting some light out of the CR123.

Looks like voltage drop across even short sections of wire are making a difference.

Yea, We are dealing with a lot of amps and low voltage, So standard test leads are probly going to give you trouble when attempting real world tests.
I have seen others have issues with this as well. So when in doubt, use BIG 'olmshort wires.

there is another guy who has a C Mag with 26650's ( I think ) puttong 11 amps to an SST-90. Think It would be wise to study his efforts!

 

[jamesavery22]

Anyone find out the draw of a sst90 with 3S4P or 4S3P eneloops?