Which LS20 has a NG400 and which has a GD400? (Answer found)

[dmdrewitt]

Could someone shed light onto which is which. :confused:

I have 2 x LS20's and they have been hiding away and haven't been used. I would like to use them, but I can't figure out which one is the older NG400 (no Li-Ion) and which is the newer GD400 which can use Li-Ion's.

I have taken a picture of them side by side.

I have done research, and have found the following quotes, but can't see my answer :mecry:

From here The LunaSol 20 now has a GD driver for driving the Osram Dragon LED and can be considered appropriate for use with both primary as well as Li-Ion cells (single cell).The LunaSol 20 consists of 3 ea. Nichia 310DS LED's in a series string driven at ~18 mA by a BBM converter. The Osram Golden Dragon LED in center is driven at ~400 mA by a GD driver as mentioned above.


And from here The first wave of LS20 lights had a NG400 converter for the main gun, meaning Li-Ions are discouraged and the use of primary cells advised. The second large wave of LS20 lights use the GD converter that allows the use of Li-Ion cells.

 

[McGizmo]

Re: Which LS20 has a NG400 and which has a GD400?

If my memory isn't failing me, the red was used to identify the NG400. The board in question of course is the "daughter board" which is hidden in the converter cavity. So my guess is the one on the right but it is a guess!! You should be able to determine quickly if it is a NG and if you have a fresh R123 as well as primary CR123 since the R123 should have noticibly higher output on high than the CR123 if the converter is the NG and not a buck/boost driver.

 

[dmdrewitt]

Re: Which LS20 has a NG400 and which has a GD400?

Thanks Don. The red coated board looks to be the NG400.

David :popcorn:

 

[I'mGatMan!]

Thanks fellas. This is great info. I'm tagging it for future reference.

Actually...seems like this might be good info to add to the Lunasol FAQ.