Mag35W for dummies

[andrewwynn]

Estimates with KIU:

7.2V: 25% overdrive, 644L, 348 hrs
8.4V: 60% overdrive, 1114L, 53.3 hrs
9.6V: 97% overdrive, 1789L, 10.5 hrs

 

[TomBrown]

click here to see a far better solution for the battery pack.. removes the springs completely.

Killer solution! Thank you.

 

[carrot]

How much did it cost total (including shipping)? I don't have the time to add it up ...studying for a physics exam. A ballpark answer would be fine.

 

[Cutler]

I really do not want to add it up. I am serious that it's better if you don't know. The turnkey kits at Light Edge are reasonably priced. They obviously do not have much markup.

With the cells and the 6D mod I am probably approaching serious flashaholism, but the first step is admitting I have a problem, right?

 

[andrewwynn]

yes, bad to add it up.. the first three BAM prototypes cost over $1000... considering the production model will sell for about $160 or so (when you include the host and batteries), that is not bad!

-awr

 

[Cutler]

Well,

I got the 8AA-2D adapter today. Pulled the ohm reducing tricks and got it stuffed in to my host with 8 CBP 1650s. Turned it on and the filament in the bulb melted...not burning out with smoke stains and such, just melted. Yes, a West 04424.

I figured the "used" bulb was maybe weakened or something so I put a new bulb in and the light really started to light up for maybe .2 seconds and again melted the filament. Nice clean puddle of tungsten in the bottom of a perfectly clear bulb. My test equipment is crude but it looks like I have about 0 ohms and a shade under 10 volts.

What happened?

I'm going to have to get some more lamps before I try it with the third and last on hand.

 

[andrewwynn]

well it is just remotely possible the CBP 1650s even with reduced capacity can output more current to spike higher voltage.. the big C solution that flakey is using use 8xC cells i believe. I've used the 8-pack just exactly like you describe w/o issue, but it wasn't a bolted adapter, just stock 8AA modamag adapter so some losses in the springs etc..

flakey did rest his cells always i believe, what was the charge state on the batts?

-awr

 

[Cutler]

4 cells were charged, left on tricklefor an hour or so, rested 60-90 minutes maybe. 4 cells were charged and stored for 3 days.

I have a spring adapter with the copper spring bridge installed.

 

[nobody]

Very nice writeup Cutler! Steve & I will be starting ours as soon as he pulls his head out of his kulu.

 

[andrewwynn]

I guess another plug for hotdriver in order.. it's the finikyness of matching lamps and batteries that caused the invention of hotdriver.. total no-brainer hotwire.. pick a battery set slightly higher in voltage than the lamp voltage you want.. dial in the voltage you want for your lamp, plug in the lamp, put in the batteries and turn on the light. click the icon in my signature to see more.