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Old 08-03-2015, 03:40 PM #1
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Default SOLD! 3.3+ Watt 445nm "Zombie Killer" Laser

Edit: Just for future reference, as I keep getting questions about the module not being flush with the heatsink, even after I posted the results of my testing on multiple threads. When using modules with a full copper back half, it does NOT make enough of a difference to sacrifice the ease of focusing the laser to flush the module with the heatsink. I observed less than 1 degree C difference after many duty cycles when pulling it all the way out to where the front half meets the back half. If someone wants to purchase one of these, I will gladly flush it if it will give them peace of mind, however, based on my testing, it will only make it more difficult to adjust the focus on this host while providing nearly no effect on heat dissipation/transfer.

SOLD! I will be posting the others and also a 520nm PLP520-B1 build tonight. Perfect timing, too! I bought an Ophir DG-HH at the same time I sold this laser. I now have the 10 watt capacity I need to measure the new NUBM diodes! So excited! If anyone is interested in these, PM me, as I have 3 more that I am currently building.

Greetings everyone! So I've decided to get myself a decent Ophir LPM that is capable of measuring the output of the new NUBM44, and I need to sell some of my current laser collection to do so.

This is one of my favorite hosts, dubbed the "Zombie Killer". It is anodized silver, and the only changes I've made to the host is adding the green tailcap cover in place of the original orange. It uses a BlitzBuck driver with an added aluminum heatsink set to 2.4A to drive a Nichia NDB7875. The heatsink is an aluminum one from Rick Trent with his copper module(my favorite module thus far). Power output as verified by my Laserbee 3.7W USB was 3.343 watts with a G2 lens. I will include a few pics on this thread. For more pictures and details, see "Zombie Killer" 3.3 Watt 445 Build









Price is $215 and includes the laser and two 18350 batteries. I will entertain any reasonable offers. Must have safety glasses to purchase. If you need a charger and/or safety glasses, I can include these in the sale. I have three more of these that I will be building this week. I am keeping one for myself because I love these hosts, but I will be posting the other two for sale as well. With any lasers I build, I will repair them for only the cost of parts if you ever damage it as long as you own it. If you have any questions at all or would like more pictures, PM me. Thanks for looking!



Last edited by TaterMay; 09-25-2015 at 04:52 PM. Reason: Sold!
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Old 08-05-2015, 07:27 PM #2
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Default Re: FS: 3.3+ Watt 445nm "Zombie Killer" Laser

Bump for price drop!

Last edited by TaterMay; 08-05-2015 at 07:30 PM.
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Old 08-06-2015, 09:00 AM #3
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Default

Quote:
Originally Posted by TaterMay View Post
Edit: Price Drop!

Greetings everyone! So I've decided to get myself a decent Ophir LPM that is capable of measuring the output of the new NUBM44, and I need to sell some of my current laser collection to do so.

This is one of my favorite hosts, dubbed the "Zombie Killer". It is anodized silver, and the only changes I've made to the host is adding the green tailcap cover in place of the original orange. It uses a BlitzBuck driver with an added aluminum heatsink set to 2.4A to drive a Nichia NDB7875. The heatsink is an aluminum one from Rick Trent with his copper module(my favorite module thus far). Power output as verified by my Laserbee 3.7W USB was 3.343 watts with a G2 lens. I will include a few pics on this thread. For more pictures and details, see "Zombie Killer" 3.3 Watt 445 Build









Price is $215 and includes laser, 2 x 18350 batteries, and battery charger. I will entertain reasonable offers. If you already have a charger and/or batteries, I will sell just the laser. Must have safety glasses to purchase. If you do not have safety glasses, PM me, and I will include some in the sale. I have three more of these that I will be building this week. I am keeping one for myself because I love these hosts, but I will be posting the other two for sale as well. With any lasers I build, I will repair them for only the cost of parts if you ever damage it as long as you own it. If you have any questions at all or would like more pictures, PM me. Thanks for looking!
Have you flushed the module with the heatsink. From the pictures in this listing, it looks as if you have not
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Old 08-06-2015, 01:58 PM #4
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TaterMay TaterMay is offline
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Default Re: FS: 3.3+ Watt 445nm "Zombie Killer" Laser *Price Drop!*

Quote:
Originally Posted by marcuspeh View Post
Have you flushed the module with the heatsink. From the pictures in this listing, it looks as if you have not
I have indeed. It's not completely flush, but based on testing, pushing it in the remaining 2-3mm would likely not make an observable difference. None of the pictures in this listing are any newer than the ones in the build thread. I'm pretty sure they're just a couple of the same pictures from that thread actually.

In my opinion, it didn't improve heat dissipation enough to justify the added difficulty adjusting the focus. Like I said in my build thread, I monitor diode case temp with both an IR thermometer and a thermocouple/digital thermometer. Even with the module where it was in the original pictures, I never reached unsafe case temps with many consecutive 40-second cycles.

Late last night, I did 2 runs of 10 cycles each while monitoring case temp to compare to my original testing. Throughout most of the runs, I got no more than a 0.2F drop in temp, which could be attributed to the accuracy of the thermometer. A lot of the temps were exactly the same. It was only during the final two cycles that I noticed enough of a difference to say that it helped at all. On cycles 9 & 10 of both runs, there was a 0.6F and 0.8F decrease. After the 10th cycle on the 2nd run, I decided to do 5 more cycles, just out of curiosity. It didn't drop any further, but stayed 0.6F to 0.8F cooler.

As long as the duty cycles are followed, I think the batteries would go dead before reaching an unsafe diode temp. Lol.






Last edited by TaterMay; 08-06-2015 at 02:13 PM.
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Old 08-08-2015, 08:14 PM #5
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Default Re: FS: 3.3+ Watt 445nm "Zombie Killer" Laser *Price Drop!*

Bump for a weekend sale!
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Old 08-08-2015, 10:13 PM #6
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Default Re: FS: 3.3+ Watt 445nm "Zombie Killer" Laser *Price Drop!*

Why don't you put the module flush with the heatsink?
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Old 08-08-2015, 11:20 PM #7
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Default

Quote:
Originally Posted by crazyspaz View Post
Why don't you put the module flush with the heatsink?

It makes it much more difficult to adjust the focus with this type of bezel, and when I measured the temp at the diode case, it produced negligible results. I could certainly flush it completely if a buyer wanted, but I don't see the purpose.

I'm curious if anyone here has actually done testing on the position of the module in the heatsink. Or maybe everyone just advises to flush it to be safe? I feel like it might have a more significant effect with the Aixiz style modules where the main heat dissipation comes from the sides of the diode case touching the module.

I've searched a good bit, but I haven't been able to find anyone on LPF who has actually experimented with the position of the module. I would be willing to bet that the results would be quite different with the modules that have hollow aluminum rear sections.

Last edited by TaterMay; 08-09-2015 at 12:58 AM.
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