Greetings,
I have recently started to look into the perks of upgrading 7805s in old game consoles (Nintendo, Sega, NEC, etc) to an OKI-78SR-5. I have done it in one console (Super Nintendo) so far, and I did it as a drop-in replacement (no other components added).
(TL;DR - is a reduction in heat output the only advantage I am going to see with this swap?)
Most of these consoles use an external AC/DC brick that spits out 9V/10V and gets fed to the 7805. They were all mass-produced circa late 80s and early 90s.
It seems like a win-win situation to replace the 7805 with an OKI-78SR-5. It doesn't cost much and immediately allows me to toss the oftentimes large heatsink in the system - therefore creating more space for audio/video modifications.
Questions:
1: Should I have any concerns about doing a drop-in replacement provided the 1.5amps is enough (generally they all use 1 amp or less, but I will double check before doing a switch)
2: Any comments regarding noise/ripple on something like the OKI vs. a 7805?
3: Somewhat tied to #2 above, would replacing the regulator potentially benefit (cleaner power/noise reduction) the various audio mixing and amplification circuits in the system?
All feedback on this is appreciated. Thanks!