Tweeking the "55W" Ballast to get an extra 18W @ Bulb

[Murilo]

Hello,

Maybe u can help me!
I got some months ago, 2x 100w xenon ballasts and 8x 100w bulbs, and make a little adaptation in a LG BN315 Projector, but 100w in a projection isn't too much, so i need Morepower on iT!

Hehehehe

With openned ballast i saw a diferent project, didnt have this little pot, but the bigest problem is: all CIs codes are erased!

I would know it you can help me with your CIs codes, and maybe where is connected this pot!

Maybe if i able to get arround 150~160w from this one would be perfect.

Photos:




Thanks

Murilo

[Morepower!]

Mmmm culd be an interesting challenge. However are you prepared to blow one or two up in getting what you want ? If not I'd say leave them alone.

Also could you please send me the high res shots to craig350ci@yahoo.com.au

[Murilo]

Sure, (i forgot this thread this month sorry )
That's no problem, i can blow one but two, maybe not hehehe, even i have osciloscope and some other good equipaments, i didn't turned it on and saw the waves on circuit pins, thats why i asked about the CI normally used on your ballasts.

I will try send you now some high resolution shots if my internet help!

Thanks
Murilo

[Morepower!]

I replied to your email wit the high res shots, how did the mod I suggested go ? Sorry it was my best guess as it was a completely different set up to mine.

[Petar92]

Hello everybody! I read about all your work,and it is brilliant! Congratulations to all who managed to get more out of stock china-made ballasts!
Anyway,I have a question. I happen to have a 35W china ballast, and I wanted to boost it up a little.. I removed all the pot,but there is no potenciometer in my ballast. I guess this is cheap one.
I understand that i have to add a few 0.5ohm resistors to the exisiting ones, but that wont give me much brightnes boost,right?
I read Daniel's post about adding resistors in paraller to the big ones,but I cant quite figure out to which one,since I found 3 big blue resistors in my ballast... And should I add new to only one of them,or two,or all 3?
Thanks in advance!
P.S. There is a picture. Green are 3 big resistors,and blue are smd resistors.[IMG][/IMG]

[Bullzeyebill]

Welcome to CPF. Your image is not working.

Bill

[Petar92]

Update: Soldered two 0.5ohm resistors to current sensing smd resistors,but as I can see,i got no visible improvement...

Just measured resistors: 1 = 1,3ohm 2=4.7k ohm 3= 5.1k ohm