I have brought my SWTPC 6800 system back to life that I built as a kid in 1976. It is pretty heavily loaded with RAM cards, floppy controller, etc. and the 8V power supply rail was never really able to hold its own. It sits at about 6.5V now... driving many 5V regulators on the various cards. No where near enough margin going into those. So, I am contemplating the following, 1) rebuild entire power supply using three switchers, 7.5v unit nudged up to 8V and two 12V units to supply ?12 on the backplane. <snip> 2) add a new transformer to the existing supply just for the 8V rail. <snip> 3) scuttle the legacy RAM cards, most of which are 4K in size built with 2102's... and one 16K built with 2114... and replace them with a single homebrew RAM card using one 32Kx8 SRAM drawing almost no power in comparison to these old cards. Any recommendations on the best choice? Chris