6D ROP = Bulb Flash

[KuanR]

I know the ROP topic has been discussed lots and I did try to search for my specific problem.

I did the ROP build with:

- 6D Mag host
- Pelican 3854H
- FM bi-focal reflector
- Borofloat lens
- 6 Tenergy 10000mah D Cells

I charged up the cells, loaded up the batteries fresh off the charger, and turned it on. I was pretty amazed at how bright it was, but the bulb burnt out in less than 1 minute of use.:(

Did I make the mistake of not letting the cells "level off" its voltage before putting them into the light?

 

[chewy78]

yes ,probably

 

[Phaserburn]

Yes, exactly. The extra .1 volt each allowed too much current, and because bid Nimh d cells have such high capacity, they readily provided it. Happens to many while experimenting.

 

[fivemega]

I charged up the cells, loaded up the batteries fresh off the charger, and turned it on. I was pretty amazed at how bright it was, but the bulb burnt out in less than 1 minute of use.:(

That's normal.

Pelican 3854 HO works hard on 6 cells and works too hard on hot off the charger D cells.

Let the cells settle down and try again.

 

[KuanR]

Good to know I made a newbie mistake. Thanks everyone!

What's a good amount of time to leave the cells sit after charging before using them?

 

[chewy78]

a day

 

[ElectronGuru]

Another option is changing over to the 3853H. The extra volt of headroom will keep the blowouts in check.