The Malkoff M61!

[PoliceScannerMan]

Has anyone tried running the M61 on a single 18650?

I havent run mine on anything but a 18650, its perfect... :thumbsup:

 

[etc]

So how much runtime do you gain with M61 over M60:

Example, M60 on 2x123 - 1:45 (?)
M61 on 2x123 - 2:15 (?)

30 mins runtime gain, something like that? Also might be on his site.

 

[smokelaw1]

I was also wondering about runtime on LOW. Anyone with the knowledge and skills to figure that out for me, on Primaries and on an AW 18650 (2600)

 

[Paulinski]

I'm running the M61 with two AW 18650 (2600) - (9P with extender).

ANy ideas on runtime with those?

 

[Fooboy]

So ... question to you fellow ar15 owners.

I was intrigued by the beam shots on the previous page of the M60 and M61. Which would you put in a nitrolon G2, mounted to an AR15 - M60L or M61L (when available)?

Using the M60 and M61 as baselines, seems the M60L would have more throw but M61L will likely be a balance of throwy-flood. May not have the range of the M60L but would be better for room clearing - perhaps the M61L would be better suited as it is more all purpose at the cost of some range?

Thoughts?

 

[pilote]

Why would one get a P61 incan when you can get a Malkoff M61 or M60 variant?

...because one CAN'T get a malkoff m60/m61 variant, unless you're lucky to find them used (and want a used one), or happen to hit the site before the m61 sells out (which they do most rapidly)...

 

[MrGman]

So ... question to you fellow ar15 owners.

I was intrigued by the beam shots on the previous page of the M60 and M61. Which would you put in a nitrolon G2, mounted to an AR15 - M60L or M61L (when available)?

Using the M60 and M61 as baselines, seems the M60L would have more throw but M61L will likely be a balance of throwy-flood. May not have the range of the M60L but would be better for room clearing - perhaps the M61L would be better suited as it is more all purpose at the cost of some range?

Thoughts?

I would put neither of these in a Nitrolon Plastic host because they would get hot. It is not recommended by Malkoff, has been covered many times already, you risk burning up the module because of lack of thermal transfer into the host since its a thermal insulator. Get a 6P or a Solarforce L2 host with the tape switch and put the M61 in that for relatively close range room clearing.

 

[tsl]

I would put neither of these in a Nitrolon Plastic host because they would get hot. It is not recommended by Malkoff, has been covered many times already, you risk burning up the module because of lack of thermal transfer into the host since its a thermal insulator. Get a 6P or a Solarforce L2 host with the tape switch and put the M61 in that for relatively close range room clearing.

Actually, Fooboy was talking about the M60L and M61L (when it becomes available). The M60L is fine for a nitrolon light according to Gene's website.

 

[Liteskr42]

Hey all,

whats the heat like on your M61s? I mean , how hot does the head/body get on your setup? Assuming you are using some 6p type variant host of Aluminum?

I ask because my setup doesnt get anything but a little warm. I have applied a cpl wraps of foil in the throat of the host but there just doesnt seem to be much heat transfer going on? I have popped out the pill and it isnt terribly warm either. Is Brass that bad of a heat conductor? or is the M61 just not running that hard so not much heat? I am wondering if it is really putting out 280-300 lumens if it isnt getting all that hot .

Thanx for your input

 

[Bullzeyebill]

Wrap the M61 module in a thin wrap of foil so that it goes into the host with a snug fit. Wrap the foil below the shoulder of the module, and do no worry about wrapping to far down as most of the heat transfer will be a the top part of the host. The M61's heavy brass with epoxy inside will transfer the heat very nicely.

Bill

 

[MrGman]

Actually, Fooboy was talking about the M60L and M61L (when it becomes available). The M60L is fine for a nitrolon light according to Gene's website.

I just don't get it. What's the point of going to the more powerful XPG but them getting it in a lower powered version. Is it just to be able to run it in a plastic housing? If your putting a light on a rifle, don't you want all the power you can get out of it and not a current limited reduced output? The M60L was out and available for a long time, he could have that already in his G2. Why waste money to buy a an intetionally reduced power XPG?

And yes I know that the L series will work in the plastic housings, wasn't sure that's what he really meant based on my rant above.

If I was putting any light on a rifle for being serious about seeing things at night, it wouldn't be in a plastic housing and it wouldn't be a lower power version of anything. There are plenty of lesser power lights out there to buy without having to buy a really good one and then specifically asking it to be current limited down to something less. Why you could go on ebay and buy lots of 300 lumen rated modules that I am quite certain will give you 200 lumens or less for your money.

 

[carrot]

Brass is an *excellent* heat conductor. The real problem is that your host is not a real Surefire, so the brass heatsink is not making full contact with the body and unable to conduct heat away.

The reason for the aluminum foil, is not because aluminum foil is magic, but because it's cheap, malleable, and metal, which makes it an excellent way to ensure a snug fit between the host and the Malkoff. You want to wrap your module tightly and neatly with aluminum foil (taking care to avoid making air pockets) until the Malkoff is snug when fully seated.

The M61 does not get as hot as you might expect but running it for 10-15 minutes should result in a warm bezel. If Malkoff says it's doing 300 lumens that's what it's doing.

 

[carrot]

Hi MrGman, you're forgetting that the M61 has a wider beam and is also more efficient, so having an M61L would result in longer runtime than the M60L as well as having a wider beam.

 

[MrGman]

Hi MrGman, you're forgetting that the M61 has a wider beam and is also more efficient, so having an M61L would result in longer runtime than the M60L as well as having a wider beam.

Not forgetting that at all. The M61 already draws less current than the M60. Also if you keep dialing down the power that "wide" beam loses its effectivity simply because its getting dimmer and dimmer out at the fringe. So you don't have as much of a "useful" wide beam by turning down the power, so again, the question becomes what's the point? Why put a dimmer "wide beam" light on a rifle specifically, you are already getting more run time just by getting the M61?

 

[PoliceScannerMan]

Hey all,

whats the heat like on your M61s? I mean , how hot does the head/body get on your setup? Assuming you are using some 6p type variant host of Aluminum?

I ask because my setup doesnt get anything but a little warm. I have applied a cpl wraps of foil in the throat of the host but there just doesnt seem to be much heat transfer going on? I have popped out the pill and it isnt terribly warm either. Is Brass that bad of a heat conductor? or is the M61 just not running that hard so not much heat? I am wondering if it is really putting out 280-300 lumens if it isnt getting all that hot .

Thanx for your input

Running my M61 in a MD2 for extended periods, it barely gets warm.

 

[Liteskr42]

Thanx PoliceScannerman thats what i was wondering. I get the same results. Although I know each of us percieves heat in different ways/levels of intensity just like light output , I have had so many other lights get so much hotter externally. True, I dont have this thing in a Surefire but 5mega makes pretty good stuff though I have noticed the Surefires have a tapered throat that the 5megas do not have maybe that makes a difference.

When you guys speak of a "snug" fit how snug do you mean . With other lesser dropins I can use pretty thick aluminum from a soda can or such and it is a pretty nice fit. With the Malkoff 2 wraps of foil and it slides in with a bit of resistance but when I try the soda can strips its so tight I got scared I wasnt gonna get it out again so I removed it but maybe that is the way to go?

I do love this dropin though :twothumbs. Super tint and great all around beam pattern and just solid feeling/looking. just knowing I could throw this thing at a brick wall and know it will fire right up is so cool. I am really into reliability these days and Malkoff is top dog in this dept. by me!!!! So glad I finally got one!!! Now I am debating an M60 low as an emergency light but cant decide between LF and LL . It would be in a motorcycle kit for nitetime breakdowns or loss of headlight scenarios. what do ya all think ?

 

[PoliceScannerMan]

Hmm as a owner of both the LF, and LL, I would go LL. BigWaffles got 18 hours of regulation on 2 x 123. :twothumbs

While the LF would be great for up close work if your bike broke down, the LL would serve you just as well while having significantly more throw that you may need in an emergent situation, not to mention all the runtime.

 

[Gene43]

Hey all,

whats the heat like on your M61s? I mean , how hot does the head/body get on your setup? Assuming you are using some 6p type variant host of Aluminum?

I ask because my setup doesnt get anything but a little warm. I have applied a cpl wraps of foil in the throat of the host but there just doesnt seem to be much heat transfer going on? I have popped out the pill and it isnt terribly warm either. Is Brass that bad of a heat conductor? or is the M61 just not running that hard so not much heat? I am wondering if it is really putting out 280-300 lumens if it isnt getting all that hot .

Thanx for your input

One thing about the M61 is that the XP-G has allowed efficiency to go up quite nicely. It simply does not get nearly as warm. The drive current was carefully chosen in consideration of the sweet spot between output and heat. Thermal foils and pastes are unneccessary in my opinion. Also I am confident in the fact that it is producing 260 lumens out the front (past the lens and all). It wil produce in excess of 280 without a lens/bezel. Momentary output, at turn on, exceeds 330 lumens in all the M61's I have tested.

Thanks, Gene

 

[jaundice]

Gene (or anyone else):

Does the lower heat of the M61 allow its use in a G2 with Nitrolon bezel? Or should I wait for the M61L or LL?

Thanks,

-John

 

[Liteskr42]

Thanx for responding Gene!! Glad to see you are feeling well enough to check in here at CPF!!!

I didnt mean to come across as negative about the output. Just curious as to others experience/opinions on theirs. I can tell output is well over 250 in comparison to other XPGs I have . Whet makes the M61 better for me is the fantastic big smooth hotspot. when tailstanding the lite and using ceiling bounce to light up a room I am in the M61 is far superior to the narrower beams of other lights I have and puts out more overall light in the room . The fact the circuitry has been fine tuned to balance output and heat mgmt is very nice. This really is a well thought out product