Bulb for SRTH // throw options

[akula88]

Hi,
I ordered an SRTH, but N2 9V LA is on back-order. For the meantime I had it shipped with an N1 6V LA. N2 is observed as having the best possible round beam.

Initially, I will have to use it with my 6P (6Volts). When N2 does arrives, 6P+A19 will accommodate the requirement. Also, plans to use 2xPila150s for the N2.

Question :
1. Considering the N2's status is unknown, which other 9-volts (or 12-volt) turbolamps are capable of running under SRTH? Runtimes?

2. What are other possible options? I need the 100-meter reach (and the Pila-powered option). SRTH+N2 has been tested to beat the Tigerlight. How does Space Needle II compares (LED vs Incan)?

Thanks.

 

[jtivat]

I like the MN61 350Lumen lamp the best but you will need two A-19's as it is a 12volt lamp.

 

[Size15's]

There are three Lamps for the TurboHead on three SF123As -
N2
MN15
MN16

The N2 is the best for the classic TurboHeads.
The MN16 is the next best in my experience.

Al

 

[akula88]

Al,
Will all turbohead bulbs fit on the SRTH?

Meaning that --
Its just that you just have to account for the exact voltage requirement for each one. --
Thus, from a base configuration of SRTH-6P, plus two extra A19, can I run all type of turbohead bulbs?

Thanks.

 

[Size15's]

Yes, these are the main TurboHead types:

"T"
"SRTH"
"T-62" aka "12PM"
"KT"
"Millennium TurboHead"

These lamps fit in all of them.

N1
N2
N4
N5
N62

MN15
MN16
MN60
MN61
MN20
MN21

N3 is only for the T3 & KT3 on the 9N and 9AN

N4 is only for the B65 NiCad 6R/7Z.

N5 for the 8X/8AX/8NX and the KT5 & T5 come with collars to fit these bodies.

Obviously you need to get the battery combination correct.

If you have

Two SF123As - 6P+SRTH = N1
Three SF123As - 6P+A19+SRTH = N2/MN15/MN16
Four SF123As - 6P+A19+A19+SRTH = N62/MN60/MN61

The SRTH works best with the N TurboHead lamps because they have smaller straighter filaments compared to the MN TurboHead lamps.

Al

 

[BC0311]

Thanks for the information, Al, and thanks for asking the question, Johnny.

I saved this for reference.

I recently bought one of Darkgear's NIB SF 3" T-4 Turbohead's for building up a kit based around my Z3.

I've run both MN15 and MN16 LAs from my M3T in the "Z3T" and they work great. I was unsure what LAs to procure for it in 12v Turbohead configuration.

Britt

 

[TonyBPD]

I have SRTH and KT turbo heads. I have the N2,MN15,MN60, and MN61 lamp assemblies. The N2 is pretty awesome but I was a bit dissapointed in the MN15.

The MN60 & 61 on a 12V platform speak for themselves. /ubbthreads/images/graemlins/buttrock.gif

 

[akula88]

Al>Thanks for that wonderful reference.

Britt> /ubbthreads/images/graemlins/wink2.gif

From previous post, MN15 seemed to put out an oblongate and more dispersed beam. MN16 is good for 15-minutes. I'm really planning to use 2 x Pila168S on this, and really hoping I could find N2 bulbs.

Is N2 still being produced by Surefire?

 

[Size15's]

It hasn't been discontinued as far as I know, but I would guess that the high demand products for Military contracts (WeaponLights mostly I guess) are getting the priority manufacturing.

That said it has been quite a while since the N2 has been in stock at a number of Dealers.

Al

 

[litho123]

What are the differences between the SRTH and the KT turbo heads? I believe the KT head is 2.5" in diameter. What is the diameter of the SRTH head?

 

[Size15's]

SRTH & KT are the same diameter and length.

KT has Pyrex lens (glass) and "chunkie" styling to make it easier to unscrew. Also, I guess this design handles heat a bit better. Importantly, the KT TurboHeads can use the FM2x BeamFilters.

The SRTH has a Lexan lens (polycarbonate). It's reflector is rather more mirror like compared to the KT which means it works better with the shorter, thinner filament lamps of the "N" TurboHead Lamp Assemblies such as the N2.

The KT reflector finish has more stochastic dimples because it is the same as the Millennium TurboHead reflector which has to handle the larger, longer filaments of the more powerful MN TurboHead lamps.

The SRTH therefore as a tighter beam and some more through compared to the other 2.5" diameter TurboHeads.

Al

 

[E__WOK]

Would it be ok to use the MN20/21 from the M6 in place of the N2 lamp? I tried the MN21 in the 9PT for a few seconds and it seems to work fine. The beam just seems much wider when the MN21 is installed versus the N2.

The M6 is based off of 9 volts.

I can't tell which light throws further---M6 with MN21(500 lumens) or 9PT with N2(105 lumens).

 

[Size15's]

The three-SF123A's may not be able to handle the juice requirements of the MN20/MN21 lamps since they are designed to be feed by more current. I believe this means the runtime will be very short as only the cream from the SF123As will be able to power those lamps.

If you blow the bulb, or batteries shutdown etc it's at you're own risk I guess...

 

[Owen]

Try www.lpstactical.com for the N2, but CALL. If you order online, and it's not in stock, they'll just put it on backorder, and ship it when it comes in...whenever that happens to be.