Different EX10 heads?

[Marlinaholic]

Hi all, maybe everyone already knows the answer to this, but I have noticed the EX10 and D10 lights come with two different heads if you look at the underside of them, check out the pic of two EX10 heads side by side:

Is there a runtime/brightness advantage to either type of head? They seem to operate the same and look about the same as to brightness, but I don't have any fancy testing devices to prove that. What do you guys think?

 

[Marduke]

Compare the 14500/16340 runtimes on the review thread comparing the two. That'll give your your answer.

 

[Ty_Bower]

I thought they redesigned the circuit at some point in the game, perhaps to further optimize something for 1.5 volt operation? The D10 got the newer circuit first, but I believe later EX10 got the new design as well. There's a thread about it around here somewhere, but it'll probably be a tough search...

 

[Marlinaholic]

I did a quick look around and couldn't find anything specific, anybody with a good memory recall the thread? Let me know guys, just curious.

 

[joeparker54]

I thought they redesigned the circuit at some point in the game, perhaps to further optimize something for 1.5 volt operation? The D10 got the newer circuit first, but I believe later EX10 got the new design as well. There's a thread about it around here somewhere, but it'll probably be a tough search...

why would the ex10, which only fits lithium batteries, be optimized to run @1.5V?

 

[Ty_Bower]

Here's one of them...

http://www.candlepowerforums.com/vb/showthread.php?t=201948

If you read nothing else, make sure you see post #34.

 

[Marduke]

I did a quick look around and couldn't find anything specific, anybody with a good memory recall the thread? Let me know guys, just curious.

You sure? A quick look shows the thread on the FIRST PAGE of the review forum, right where it's supposed to be. Didn't even use either of the CPF search functions.

 

[joeparker54]

I thought they redesigned the circuit at some point in the game, perhaps to further optimize something for 1.5 volt operation? The D10 got the newer circuit first, but I believe later EX10 got the new design as well. There's a thread about it around here somewhere, but it'll probably be a tough search...

Why would the ex10 need to be optimized for 1.5V when it can only use/fit lithium batteries?

the differences are probably due to the fact that the d10 requires extra boost circuitry and draws much more current out of the AA then the EX10 out of the 16340

 

[Ty_Bower]

Why would the ex10 need to be optimized for 1.5V when it can only use/fit lithium batteries?

the differences are probably due to the fact that the d10 requires extra boost circuitry and draws much more current out of the AA then the EX10 out of the 16340

I was speaking from memory about a thread I read half a year ago. The D10 and the EX10 both have the same circuit. I knew there were two different versions of the circuit board. When the board got redesigned, the new revision went into the D10 first. I believe it later went into the EX10 as well. Fumbling for an explanation why Nitecore revised the circuit, I surmised it had something to do with low voltage (~1.5v) operation. Clearly, I was mistaken. It was all about the "glow bug", which apparently affected a batch of D10 and not the EX10.

I was wrong. Forgive me. :sigh:

...and didn't you already ask your question once in post #5?

 

[Marlinaholic]

Thanks Ty Bower, THAT thread is exactly what I was looking for. Sounds like the circuit was changed just to eliminate a problem of some lights not completely shutting off, though I guess only some had that problem, so as long as your light works right, doesn't matter which head you have, or at least that is what I got out of it.

 

[Ty_Bower]

That is how I read it. Too bad Octaf pulled his old photos, but I recall they looked more or less exactly like yours. One version had only one large black chip on the back side of the circuit board, and the other had several. Nitecore stated they both function the same - it's just the physical layout which differs. The "old" version which has only one chip visible on the back side has all the others on the front.

 

[jag-engr]

I believe that the old circuit was more easily modified. Some members were able to boost the maximum current draw from 500 mA to 700 mA.