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ArcticMyst Security by Avery

Nova X75, not so elegant

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PointBlankRange

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Hi guys, I received my X75 a few days ago, and it hasn't really surprised me with anything outstanding. It is my first laser, and after reading many reviews about them on this site, people say theirs averages about 95mw or more in output. When mine came, it said it averaged 78mw and maxed at 83. It takes about 5 seconds to light a match at its focal point, and doesn't pop balloons without a black sharpie mark on it. Is this common for the x75, or could it be a little defective? By the way I am using Duracell Alkalines.
 





FireMyLaser

FireMyLaser

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Um, it takes 4-5 seconds for my x125 to light a match. :-/

Your x75 is just fine. :)
 
Chicxulub

Chicxulub

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my 68mw x50 pops black unsharpied balloons with no lens instantly with fresh e2 lithiums. I've never tried to do a match.
 
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Peoples_Elmo

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PointBlankRange said:
Hi guys, I received my X75 a few days ago, and it hasn't really surprised me with anything outstanding. It is my first laser, and after reading many reviews about them on this site, people say theirs averages about 95mw or more in output. When mine came, it said it averaged 78mw and maxed at 83. It takes about 5 seconds to light a match at its focal point, and doesn't pop balloons without a black sharpie mark on it. Is this common for the x75, or could it be a little defective? By the way I am using Duracell Alkalines .
Click to expand...
Alkalines are a bad idea try rechargeables and see if you notice a difference (remember 2-3 hour battery life
 
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KRyan

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I have an X-125 rated at 140 mW average and have found that, one it really depends on the match, and two balloon popping is all about steadiness and distance. I don't think theres anything wrong, you may be expecting 100 mW performance out of a 75 mW laser, and those 25 mWs make a big difference.
 
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lazerguy

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FireMyLaser said:
Um, it takes 4-5 seconds for my x125 to light a match. :-/
Click to expand...
Hey, that's strange. With my Nova x-85, I can on fresh rechargeables light an unsharpied red match in a second from a distance of 2 feet! :)
 
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Murudai

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It would depend on what kind of matches you are using. Some light better than others.
 
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lazerguy

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Well, I don't know about the matches since it's just some ordinary matches I had lying around. I use sony Ni-MH rechargeables with 900mAh. They are like a grey color, at the negative end they are orange. They seem to be a very high quality - the owner of a local battery store recommended them to me. :)
 
FireMyLaser

FireMyLaser

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Ok, so the problem is not in the batteries for sure, as I use VARTA 1000mAh.
My x125 do have some divergence problems, so that's a [smiley=thumbdown.gif].

I'll try with some other matches when I find some.
THX!
 
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lazerguy

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Well, the divergence of mine is no great either, about 1,6mrad. I would love to get a cheap beam expander so that I could collimate the laser better. I am using binoculars for that purpose at the moment, but the glass in them absorbs too much light. :(
 
FireMyLaser

FireMyLaser

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I have a genuine, adjustable 5X expander from a YAG laser. I got it from dads work because it had some severe optical damage (the plano concave was burnt). I fixed that by replacing it with a very similar one in a camera and it works pretty good. Some light is lost, but I can deal with it :). Still need some fine tuning so I can focus it to a fine dot up close.
I haven't done any mRad measurement with it yet, but it looks like is reduced by halve, now I can clearly see the dot hitting the clouds. :)
5X052-1.jpg
 
IgorT

IgorT

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quadcam said:
my 68mw x50 pops black unsharpied balloons with no lens instantly with fresh e2 lithiums. I've never tried to do a match.
Click to expand...

Lithiums don't matter in CNI lasers. They are current regulated, and amazingly well at that. The voltage of the battery will not affect the power of the laser, as long as it is in regulation.

Unfortunatelly, alkalines sag under so much current draw, and can make it drop out of regulation fast. It is best to use two pairs of Ni-MHs, and recharge one while using the other. 1000mAh Ni-MHs drop out of regulation, when they have 1.283V each. These things contain an AMAZING driver.

Lithiums might keep it in regulation for a bit longer, than Ni-MHs, but once they drop under a certain voltage, they become useless, and they are not even half empty yet.
 
f22warzone

f22warzone

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when I had my alpha I had contacted nova about batteries and for full power for your laser you need 2.8v (minimum for maximum power) and go as high as 3.8v but any thing over 3.6v would start causing excess heat in the driver.... so your nimh batteries even at a full charger right off the charger the most I ever got was 1.4v and when I used them in my alpha it was almost as bright as lithium’s. So yes cni lasers are very well regulated but like other electronics you still have to meet the minimums in order for it to be effective
 
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