hoghunter wrote in post #4808622
I know it has been a while since the posting of this message, but I was wondering if you have any insights now that it has been a while. Also, I was curious if you found any better solutions after the DIY project. I know for me it seems like as soon as I decide to go in one direction, a slew of better choices pop up even though I can't take advantage of them.
Finally, I was wondering if you are interested in providing a service of making these changes to other people's flash units.
Yeah, It's been almost a year, I think, since I tried this mod. It was actually pretty successful. I determined that my 5-cell NiMH pack recycles almost a full second faster than the 4 cells in the flash itself. I've actually been able to use up to 8 volts with improved performance and without failure, but it seemed too risky to continue using it at that level. I haven't seen much need to use my flash so extensively for me to merit building my 5-cell pack (It's just been tested, not completed). The in-flash batteries are fine for me at the moment.
If I were to improve upon this design, I wouldn't use NiMH's anymore. I'd invest in a 6V Sealed-lead-acid battery and call it a day. I don't think I'd need to change anything on the flash itself...just the battery pack. Better solutions for the Sigma Super? None that I've found. Faster recycling time means higher voltage and less internal resistance, and the only way to really do it is to use a battery pack.
As for doing this modification for others, I can in no ways say that my soldering skills are professional. I took one soldering class my freshman year of College, and since then, I just do random projects here and there. Most of the time, I end up melting some of the plastic shells of whatever I'm working on, so maybe me doing it isn't the best idea.