Mag66 12.5V vs. 12.68V

[LuxLuthor]

I have a Mag66 1D with 4x14500 using a AWR hotdriver limited at 12.55V which gives 928 L on their WA rating site and a bulb life of 7.7 Hrs.

However, I got another hotdriver that was intended for a 100W Osram bulb that has a AWR printed voltage on it of 12.68V which now rerates to 962 L and 6.8 Hrs of life. I'm using it in this 1.5D FM Mag with 4x14670.

It is noticeably brighter than my first one, but I'm not sure how much this bump up in hotdriver voltage will really affect the life. So far it has been running for 2 hours total.

What is involved with changing the voltage of these hotdrivers?

 

[LumenHound]

You will have to adjust the trim pots.
Instructions for adjusting the trim pots

 

[LuxLuthor]

Those instructions are as clear as mud.

So on his picture below, I assume it is the two round top settings that have + in middle of them? (Below what looks like R0 & R1)

Which gets turned, and by how much to change how many volts? I'm not sure which is fine tuning or coarse, and how much a full turn changes voltage. It seems that clockwise reduces voltage?

 

[litho123]

One pot is the coarse voltage adjustment and the other one is the fine adjustment. I'll have to track down the link to AWR's instructions. I think it's buried in my Regulated hotwire parts sales thread from Q1 of 2006.


Here is the link for setting the HD.
http://candlepowerforums.com/vb/showpost.php?p=1336509&postcount=228

 

[LuxLuthor]

Greg, thanks for your note. I posted my confusion in his active GB thread here. I'm trying to figure out how you can adjust it after taking it apart to get to the adjusting pots....get it set the way you want, then put it back together once.

 

[litho123]

You don't need to do much...

Remove head and bulb.
On the aluminum disc below the bulb holder are two small holes near one of the screw holes. Just plug in the DMM into the bulb leg holes and take your reading when the light is switched on. Then use the appropriate pot to adjust the voltage accordingly with a tiny screw driver. The DMM will display the changing voltage.