What's wrong with two of these, and where did I get them?

EngrPaul

Flashlight Enthusiast
Joined
Sep 28, 2006
Messages
3,678
Location
PA
I'd offer a prize if it wasn't so easy.

IMG_1509.jpg
 

davenlei

Newly Enlightened
Joined
Feb 5, 2007
Messages
161
Oh geez. Now I have to check all my Seoul's waiting for installation into mods.
 

EngrPaul

Flashlight Enthusiast
Joined
Sep 28, 2006
Messages
3,678
Location
PA
Yes, it's a heads-up that you should be checking your DX stars before installing them. :tinfoil:
 

Anglepoise

Flashlight Enthusiast
Joined
Nov 4, 2004
Messages
1,554
Location
Pacific Northwest
Also in another post, members received some DX stars where there was little contact with the slug to the star base. You could hold up to the light and see the gap.
Only thing keeping the emitter attached was the two electrical connectors .
Not very good.
 

qip

Flashlight Enthusiast
Joined
Jan 10, 2007
Messages
1,503
Location
u.s
just install them reversed :) get some white out and change the + & - :grin2:
 

coldlocus

Newly Enlightened
Joined
Feb 26, 2007
Messages
53
Ok, for us not so electronically inclined, what's the difference? :)
The only thing I see is one of the contacts, one of the U-shaped ones is in the wrong spot. Is that it? And what does the U-shaped contact mean?
 

EngrPaul

Flashlight Enthusiast
Joined
Sep 28, 2006
Messages
3,678
Location
PA
chimo,

The correct polarity one is lifted nearly as much as yours! :hairpull:
 

selfbuilt

Flashaholic
Joined
May 27, 2006
Messages
6,936
Location
Canada
:eeksign: Wow, good catch EngrPaul!

Just checked, and all 5 of my DX SSC stars are fine. Also bought 5 from Kai, all checked out fine as well. Very disturbing though ... :shakehead
 

EngrPaul

Flashlight Enthusiast
Joined
Sep 28, 2006
Messages
3,678
Location
PA
I found out first by illumination testing at receipt, when two were "dead" I looked closer.
 

EngrPaul

Flashlight Enthusiast
Joined
Sep 28, 2006
Messages
3,678
Location
PA
coldlocus said:
Ok, for us not so electronically inclined, what's the difference? :)
The only thing I see is one of the contacts, one of the U-shaped ones is in the wrong spot. Is that it? And what does the U-shaped contact mean?

Sorry I missed your question before.

The "U" contact marks the side that connects to the (-) source of electricity. It's called the "cathode".

The stars that are wired backwards have (+) labeled pads that go to the cathode. They will not light up unless you ignore the labels and wire the star based on the emitter markings.
 

yellow

Flashlight Enthusiast
Joined
Oct 31, 2002
Messages
4,521
Location
Baden.at
Its even worse!
They not only will not light up, they will be immediately destroyed when getting this much reverse current

(if they behave like Luxeons, I did not kill SSCs or Crees by now) ;)
 

johnny13oi

Enlightened
Joined
Feb 18, 2007
Messages
642
yellow said:
Its even worse!
They not only will not light up, they will be immediately destroyed when getting this much reverse current

(if they behave like Luxeons, I did not kill SSCs or Crees by now) ;)

I thought that they don't draw any current if it is reversed. They only get damaged if a high enough voltage is applied in reverse if I am correct?
 
Top