SF 9P Turbo with M6 Bulb fitted

[RoadKill]

Had a bit of a play with the torches last night.

Thought occured to me that the M6 is 9V and so is the 9P.

I've got a 3" Turbo head so I thought Mmmm I wonder.

I put the 250lumen bulb assembly into the Turbo head and gave it a go on the 9P(nervously)

What can I say!

It's incredible! Looks like a small lighthouse!!
Don't know what the run time will be? Hopefully around 25mins.

I'm going to run it this way from now on!
Anyone else tried this? Am I flirting with disaster?

Marty

 

[Bushman]

You are underdriving the lamp significantly. The key here is that you are using 9v serial whereas the m6 is 9v serial parallel. You will put undue strain on your batteries and also not properly engage the halogen/xenon cleansing cycle for the lamp most likely reducing its life.

 

[lemlux]

Brocks page shows that the 2.35 Amp P91 pulls 6.25 V.

The higher current 2.45 A MN20 in serial/parallel pulls 7.2 V because the current per cell is only 1.23 Amps.

The MN 20, thus, can be expected to pull < 6.25 V in a 9P body.

 

[RoadKill]

Thanks for the advice.

Can you get the P91 in the form required to fit the Turbo head?

Marty

 

[Bushman]

No, your absolute best lamp for the 9pt is the N2 lamp assbly. 105 lumens for 60 minutes. It will throw a very tight beam with the 3" TH

 

[doubleE]

Martymelter,

I think you can use the MN15 or MN16 instead of the N2.

MN15: designed for M3T, 125 lumens, 60min
MN16: designed for M3T, 225 lumens, 20min

Somebody correct me if I'm wrong.

-doubleE

 

[Size15's]

You can, but the N2 has the tightest, roundest beam. The MN16 puts a lot of light down range - I suggest people try the MN16 just so they see how it performs and have it as an option.

Al

 

[lemlux]

If you want more lumens than the N2, buy an A19 extender and use the 4-cell MN60 225 Lumen 1.1 Amp or MN61 350 Lumen 2.3 Amp L/A's. Neither will throw as far as the N2 but the hot spots are larger.

I would not advise you to buy the N62 500 lumen 3.7 A L/A because it can only run 3 minutes before the batteries shut down. After 6 minutes of run time it is dimmer than the MN61. (I will use my 2 N62s that came with my recent used 12PT TH purchases in a rechargeable project light for this reason.)

 

[ola larsson]

martymelter how long is the runtime ...? And is there any Fitting problems you have to worry about? Or does it just drop in?

 

[RoadKill]

Ola Larsson,

No idea on runtime. Just drops in-no probs.

Taking it out after advise given here that I am underdriving the lamp assy.

Going to get myself a MN16 lamp to try out.

Marty

 

[ola larsson]

Ok .... looking for a flashlight about size as M6 with about 225-300 Lumen in power ... AND Rechargable ...

And are getting the Copia kit for making a 9P recharable this week ... thats why i are intressted..

 

[lemlux]

Ola:

I intend to try a 225 Lu 4-cell MN60 with a TH with either:

a.) 2 @ 1000 mAh LRB150B + 1 @ 1400 mAh CR123 in a 9P plus A19. or
b.) 2 @ 1400 mAh LRB168B + 1 @ CR123 in a 9P plus 2 @ A19's

It's not entirely rechargeable, but for almost 1 hours run time burning 1 @ 123 isn't bad.

I'm more likely to run the longer combination for 40% longer run time.

 

[lemlux]

MartyMelter:

It just occurred to me that two of the Copia 3.7V LRB168B's would probably underdrive the MN20's by less than three CR123's.

 

[RoadKill]

It just occurred to me that two of the Copia 3.7V LRB168B's would probably underdrive the MN20's by less than three CR123's.

Lemlux:

Am I missing something here?

3x CR123 @3v =9v
2x Copia 3.7v =7.4v

Tell me i am mistaken but how can that work?

Marty

 

[lemlux]

martymelter:

The MN20 wants to pull 7.2 V for 2 * 3 123's.

3 123's at 2.45 A will voltage drop from nominal 9 V to 6.2 V or less.

2 168B's at 2.45 V at nominal 7.4 V will voltage drop to something below 6.6 V (based on GP data sheets that show that GP Lithium Ions will pump out between 3.3 V and 3.0 V per cell for 80% of their capacity at 1.5 C. 1.5 * the 1400 mAh C of the LRB168B is 2100 mA which isn't all that much less than the 2450 mA of the MN20.)

Both battery configurations will underdrive the MN20 but the Copias are apt to deliver 0.2 V to 0.4 V more than the 123s.

 

[lemlux]

Marty:

All this discussion and anticipation of my im-pending reciept of A sized and 4/3 A sized Lithium ions has motivated me to buy an MN16.

Previously I used 4@ 123's to get 1 hour of 225 Lumen with an MN60 rather than 3@ 123's for only 20 minutes with an MN16. Four 123's per hour is a lot cheaper than 9 per hour for the same lumens. With the Copia lithium-Ions, the formula changes and the MN16's become cost effective.