Malkoff MDX16.5 head-FOUND

[CHNeal]

Hello All,
I am looking or a Malkoff MDX16.5 head to put my M91B in. I will trade a like new MDX22.3 head for yours or pay cash.
Let me know what you have and what you want.

Thanks for looking

 

[thermal guy]

the 22.3 will give you the most out of that M91.

 

[CHNeal]

the 22.3 will give you the most out of that M91.

I know, just looking for the head it was originally designed for. I have multiples in the 22.3 format and wanna see what the other was like.

 

[ledbetter]

You could always put it in a vme head to check out how it looks.

 

[kerneldrop]

I'm curious if the M91 in its entirety was designed for the 16.5. I know it says that in one place, but it doesn't say that in the dropin only description. Then I wonder if that's the same reflector that's in the M31 because that one was also designed by Don.

 

[PoliceScannerMan]

Lose spill with the 16, that's the difference. I prefer the 22. I guess a argument could be made the 16 would survive longer in extreme conditions, but idk.

 

[kerneldrop]

...argument could be made the 16 would survive longer in extreme conditions

So daily use for me and @CHNeal

 

[thermal guy]

It was designed for the 22 mm head. If you order the whole unit that's what it come with. A lot if not most of the light comes from the outside of the reflector.You can test this out and put a dime or something smaller in diameter right in the middle of the lens and turn it on. The beam pattern doesn't really change.

 

[CHNeal]

It was designed for the 22 mm head. If you order the whole unit that's what it come with. A lot if not most of the light comes from the outside of the reflector.You can test this out and put a dime or something smaller in diameter right in the middle of the lens and turn it on. The beam pattern doesn't really change.

I beg to differ. Straight from the website. Its also obvious when you look at the amount of exposed edge of the reflector…

 

[Owen]

The M91B was designed to work with the 16.5mm head*, and that's what it came with, if purchased together, before they standardized on the 22.3mm one.
That's why it's recessed for a 16.5mm lens, just like the M31 and M61.
Differences:
-With the 22.3m lens/head the OAL of the light will be longer by the thickness of the lens, as the front of the dropin butts up against the lens rather than containing it.
-The 22.3mm head will allow slightly wider spill(as will a SF host)
-The 16.5mm head and lens are in turn slightly more robust due to increased coverage and a smaller diameter lens.
I don't personally find a practical difference between the two.

*Technically, starting with the M30 and M60 dropins, they were all *designed* to be SF-compatible until the T models, which required a MD head, but larger opening due to the optic.

All that said, if you want a user 16.5mm head for about half of retail, hit me up. I have one that was labeled as a "blem" due to a couple of pre-ano dings.
I'll PM you with pics...

 

[CHNeal]

Lose spill with the 16, that's the difference. I prefer the 22. I guess a argument could be made the 16 would survive longer in extreme conditions, but idk.

That's the thing, you don't loose any spill. See how the reflector was designed for the smaller lens/head.

 

[thermal guy]

I see what your saying but if you put that 91 in a 22 mm head opposed to a 16 mm you will get more spill. Done it when this topic first was discussed years ago. As owen said you will get even more when in a SF head. I have one in a Z32 and the spill is huge. But ya for most it doesn't matter

 

[PoliceScannerMan]

Definitely lose spill due to the edge of the 16 bezel, the 22 bezel allows more of the "cone" to shine. The 16 chokes the cone.

 

[CHNeal]

The M91B was designed to work with the 16.5mm head*, and that's what it came with, if purchased together, before they standardized on the 22.3mm one.
That's why it's recessed for a 16.5mm lens, just like the M31 and M61.
Differences:
-With the 22.3m lens/head the OAL of the light will be longer by the thickness of the lens, as the front of the dropin butts up against the lens rather than containing it.
-The 22.3mm head will allow slightly wider spill(as will a SF host)
-The 16.5mm head and lens are in turn slightly more robust due to increased coverage and a smaller diameter lens.
I don't personally find a practical difference between the two.

*Technically, starting with the M30 and M60 dropins, they were all *designed* to be SF-compatible until the T models, which required a MD head, but larger opening due to the optic.

All that said, if you want a user 16.5mm head for about half of retail, hit me up. I have one that was labeled as a "blem" due to a couple of pre-ano dings.
I'll PM you with pics...

Thanks Owen. I will take this. I responded to your pm.

 

[thermal guy]

Definitely lose spill due to the edge of the 16 bezel, the 22 bezel allows more of the "cone" to shine. The 16 chokes the cone.

I don't think I have ever heard the phrase "chokes the cone" 😂

 

[PoliceScannerMan]

Makes sense though eh?? Lol!!

 

[CHNeal]

Payment sent.

Thanks Owen.