Night Vision Emission Point in my left tube

[aslrookie]

I have L3 thin filmed WP tubes, and my left tube developed an emission point. I was doing some dry fire practice in the basement which is pretty dark and saw it. I went outside and it was not visible.

NV inc offered to pull the tube and send it to L3 for warranty work. Has anyone dealt with this before? My only concern is turnaround time with all this supply/demand shortages for gun related stuff.

Anyone know what causes an emission points?

 

[Choid]

So it is only visible when in the basement? I wouldn't worry about it unless the basement is where you plan on using your NV rather than outside.

 

[aslrookie]

Yeah, I did some night shooting two nights ago when it was no moonlight and foggy and never saw it. Then I was dry firing in the basement and saw it right away. I then went upstairs to look outside from the patio and couldn’t see it anymore.

Went back to the basement and it was there. The tubes never had it before since I bought them 9 months ago. Do emission points get worse if not fixed? NV is expensive, so if there’s a warranty option and all it costs me is shipping...kinda seems like a no brainer to have it warrantied.

 

[LibertyArms]

If you dont see it when out side its probably not a huge deal. If you see the same emission brightness under all conditions then you may want to repair it. If you got it from.NV inc glynn will help take care of it and point you in the right direction and he has been solid with me over many purchases.

 

[zinny]

To go with the OPs question, what actually happens when a tube is sent in for "warranty work". Will they actually try to repair the tube by breaking it down. Or do they just discern if the "issue" is covered by warranty. "yes" = send you an equv tube and "no" = send it back and tell you to sniff sharpies before going out next time?

If they send a equvalent tube, say you have a high spec 18um, would they just send you any 18um so if your old tube was 2200FOM, this new one may be 1800FOM too bad so sad?

 

[WillHugh]

Sometimes they burn out, othertimes the tube can degrade around the spot. I'm not an expert on the topic, but I bought a set of pvs15s with an emission point and had it fixed. If you're under warranty I'd probably get it resolved for peace if mind. There's a private shop in Texas that has the machine to fix them as well - turnaround might be faster than a trip back to L3.

 

[aslrookie]

To go with the OPs question, what actually happens when a tube is sent in for "warranty work". Will they actually try to repair the tube by breaking it down. Or do they just discern if the "issue" is covered by warranty. "yes" = send you an equv tube and "no" = send it back and tell you to sniff sharpies before going out next time?

If they send a equvalent tube, say you have a high spec 18um, would they just send you any 18um so if your old tube was 2200FOM, this new one may be 1800FOM too bad so sad?

Speaking of FOM, my specs for my tubes are 23.0/23.1 SNR and then resolution is broken up into two different numbers, center resolution and high light resolution. The center resolution is 64 on both tubes and 40 on high light resolution on both as well.

If you take 23 X 64 = 1,472 is this my FOM? Or would it be 64 + 40 = 104 X 23 = 2,392 FOM? Nothing I find online says anything about two different resolution numbers.

Photocathode senstivity is 1609 and 1550, not sure if this is same as FOM?

 

[Choid]

The first one. SNRxcenter res.

 

[aslrookie]

I guess I’ll just wait and see if it works itself out or if it gets worse then just send it in for warranty.

 

[GBMaryland]

A figure of merit that is 1500 is pretty much a commercial spec tube.

 

[aslrookie]

I got it on a black friday deal last year. $5k out the door for everything. I’m happy with it.

 

[jwramp]

I guess I’ll just wait and see if it works itself out or if it gets worse then just send it in for warranty.

Just be aware the tube manufacturer likely has a shorter warranty period than your vendor. If the vendor already offered to warranty it, I’d hop on that rather than not dealing with it. Would be a turn-off to prospective buyers if you ever resold it to have a periodic emission point or whatever it is.

 

[TNVC_Will]

Just be aware the tube manufacturer likely has a shorter warranty period than your vendor. If the vendor already offered to warranty it, I’d hop on that rather than not dealing with it. Would be a turn-off to prospective buyers if you ever resold it to have a periodic emission point or whatever it is.

+1
Emission points can get worse. I'd use the dealer's warranty while you have it even though most likely he'll be using the mfg's warranty. Ideally the dealer would take care of you out his stock and deal with the warranty so you don't have to.

 

[aslrookie]

I just boxed it up today and sent it off. I may have included a note with a request to swap the tubes and glass into an RNVG housing since he's pulling a tube for warranty work anyway lol. Figured I can keep the ANVIS 9 housing and have it setup for the wife when we're ready to get her a set of duals as well.