Old 09-24-2010, 01:56 AM #1
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Exclamation 1.6W 445nm Polished Aluminum Ehgemus Host Review - My New Centerpiece

Here is a great host that I have been very impatiently waiting on some diodes to arrive so I could build it. It is a polished aluminum Ehgemus Host made for an 18650. This is probably the nicest host in my collection. It is definitely a toss up with the SS 18650 from Jay but this is unique in that it was built from scratch instead of repurposing a flashlight.



Also if you would like to see more of my reviews and tutorials please visit my compilation page.

http://laserpointerforums.com/f51/dt...tml#post797151






*Host Images*



I find myself holding it like a cigar most of the time. Which is not abnormal for me since I love cigars.




















The clicky on the back is sooo smooth. I have to give Ehgemus some major props. This clicky is fantastic and is by far the best I have used. You can slightly press for a momentary style or do a full depress for a on/off style clicky.













The host is fit for a protected 18650 and it fits like a glove.













*Assembly Images*

Host consists of these components. The host body, the tailcap, direct press head and the focus adapter.








This unit has a direct press head. It eliminates the need for a heatsink and a module. The entire host is your heatsink. This allows for great heat dissipation throughout the whole host body. Make sure you countersink this diode. It goes a lot further into the head than an Aixiz module. If you don't get it all the way in you will have trouble focusing your beam.









On this build I am using a Flexdrive set to 1407mA. I think. My pyroload jumps around a lot at that current. I am waiting for some industrious member to make and sell a test load that can handle 2-3A without melting or causing my DMM to go wild. Already burned out one pryoload.

I was trying to stay a bit under the 1.5A max because I am not using a heatsink on the driver(yet). I am glad I grabbed a few extra before they all disappeared. Hopefully the good Dr. will have another round of them available soon.








I use an isolated line from the case pin back to the driver negative input on builds that don't have an easy way to get your negative feed from the pill of the host. I have been using this method with the microboost or even the flexdirve which has an alternative method of shorting the case pin and letting the negative feed come back into the driver negative output. See here for more details. And of course I only use the Flaminpryo wire available in his Laser Parts Thread. Along with some other necessities.








I wrapped the flexdrive with some electrical tape for now. I will be getting a small aluminum heatsink and use some thermal adhesive to attach it to the driver. But it does run over 60 seconds the way it is.

Now the only thing that could be better on this host is since the head is a direct press for the diode you cannot keep from twisting up the wires when you screw it on( there are rumors that Ehgemus is working on a non threaded head that would solve this issue) On builds without a direct press head the heatsink can be stationary while the head is screwed on.

But I have found that by giving a little slack on the diode wires and doing a few counterclockwise turns with the head and then screwing it in works pretty well. That way it is untwisting while being screwed in instead of twisting and you can make sure you don't bind your diode pins while doing it.









Then all you need to do is screw your lens into your focus adapter and then screw that into the head of the unit and you are ready to lase.










EDIT

I have now modified this unit with a coin mod.

I took a penny and ground it flat on both sides then bent the coin slightly on both sides.








I had to bend a little and check to see if it has contact with the host walls and repeat until I got a good fit.







Then I mounted a new flex set to max on the coin with some thermal adhesive.







Once the driver was set it was time to mount the coin in the host. Used an alligator clip to hold it against the host until the adhesive dried.







Then all I had to do is solder the diode to the new driver leads.






*Beam Shots*










































































*Videos*

Here is a video of me using the unit. Check the momentary style use of the clicky.













*LPM Test*

405-G-1






*Final Thoughts*

This is definitely a centerpiece unit for my collection. This Ehgemus host is beautiful with it's extremely well polished exterior and its very clean sleek design. All the threading feels really smooth and don't forget the great clicky. I will hold on to this one for a long time.

Hope you all enjoyed the review.

Last edited by DTR; 02-29-2016 at 10:10 PM.
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Old 09-24-2010, 02:12 AM #2
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Nice job -your photos are the best--

have a black stallion Ehg built for me by Luke and its my fav too.- 650mWs -AixiZ glass- 18650-Flex V5.

NFS -dont even ask!!
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Old 09-24-2010, 02:13 AM #3
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Nice work, as usual. Its by far my favorite host/laser combo. I play with mine all the time. Beware you dont hit that TV with the laser. You'll fry the pixels in a millisecond.
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Old 09-24-2010, 02:19 AM #4
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Quote:
Originally Posted by hakzaw1 View Post
Nice job -your photos are the best--

have a black stallion Ehg built for me by Luke and its my fav too.- 650mWs -AixiZ glass- 18650-Flex V5.

NFS -dont even ask!!
I plan on building my own black Ehgemus host. Looks pretty sweet as well.

Quote:
Originally Posted by Tech_Junkie View Post
Nice work, as usual. Its by far my favorite host/laser combo. I play with mine all the time. Beware you dont hit that TV with the laser. You'll fry the pixels in a millisecond.
I try not to hit the TV. But I like the XBMC screen saver in the background.
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Old 09-24-2010, 02:20 AM #5
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Quote:
Originally Posted by Tech_Junkie View Post
Nice work, as usual. Its by far my favorite host/laser combo. I play with mine all the time. Beware you dont hit that TV with the laser. You'll fry the pixels in a millisecond.
did it with a 6x
My tv has 1 dead pixel and both my desktop monitors have dead pixels now.

I'm waiting for it to happen one of these days lol. He'll have a video he can post in the FAIL thread.

It will be an expensive laugh, but a laugh non-the-less
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Old 09-24-2010, 02:31 AM #6
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Wow! that is a solid unit... I can tell your very happy with that. Beware Darth Maul
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Old 09-24-2010, 03:10 AM #7
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Quote:
Originally Posted by Mohrenberg View Post
did it with a 6x
My tv has 1 dead pixel and both my desktop monitors have dead pixels now.

I'm waiting for it to happen one of these days lol. He'll have a video he can post in the FAIL thread.

It will be an expensive laugh, but a laugh non-the-less
Firstoff... awesome review!! Great pictures too, well done!!

Aside that, Mohrenberg I'm not sure how those pixels you talked about died - but if they're not fried from a laser, you can 'restimulate' those dead pixels & possibly bring them back to life by applying firm (be careful) pressure around them in a 'smudging' sort of way when your tv and computer monitors are off. I used to repair monitors & this process worked roughly 90% of the time when fixing dead pixel issues. Just FYI
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Old 09-24-2010, 03:21 AM #8
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Nice review DTR. My Ehgemus host is the centerpiece of my (small) collection as well. Incredible work he does!!
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Old 09-24-2010, 03:23 AM #9
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Very nice review!
Ehgemus's hosts always look great, I really want to get one for my 445 but other things come first.
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Old 09-24-2010, 03:25 AM #10
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

WOW great review and great pictures.

Just want to add that the new host will not have the wire twist problem when screwing on the head. Here is a picture of the new style head. I might change the plastic to aluminum for better heat sinking for the driver.




Last edited by Ehgemus; 09-24-2010 at 03:36 AM.
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Old 09-24-2010, 03:37 AM #11
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Very good review, you have done a profesional job be proud be very proud
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Old 09-24-2010, 04:15 AM #12
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Quote:
Originally Posted by Ehgemus View Post
WOW great review and great pictures.

Just want to add that the new host will not have the wire twist problem when screwing on the head. Here is a picture of the new style head. I might change the plastic to aluminum for better heat sinking for the driver.

Glad you liked the review. You make some pretty sweet hosts.

I like the design of the new units. May have to pick one up.
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Old 09-24-2010, 04:17 AM #13
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

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WOW great review and great pictures.

Just want to add that the new host will not have the wire twist problem when screwing on the head. Here is a picture of the new style head. I might change the plastic to aluminum for better heat sinking for the driver.
Is that an interchangeable head?
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Old 09-24-2010, 04:25 AM #14
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

The mirror like finish on the head in that first picture is awesome!
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(6x) 445nm
(4x) 532nm
(1x) 543nm
(1x) 632.8nm
(1x) 635nm
(3x) 660nm
SSY-1 Laser
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Old 09-24-2010, 04:29 AM #15
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Quote:
Originally Posted by Gryphon View Post
The mirror like finish on the head in that first picture is awesome!
I also really liked that shot. That is why put it first.
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Old 09-24-2010, 04:43 AM #16
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Default Re: 1.5W 445nm Polished Aluminum Ehgemus Host Review - My New Center Peice

Nice review! Now I am even more inspired to build a 1.5W blue laser
I was wondering what sort of duty cycle you use, and what lifespan you might expect (total hours usage) at this duty cycle with this power level.
Also, is there room for a heatsink on the driver? ( a small one).

Thanks and regards,

AAlasers

-Great beam shots BTW
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