wadesey

Yep, I had the properties of J1 and J2 confused. Everything measure correctly now. Thanks!

Another kind of related power issue that hopefully someone can answer... I successfully made the C64 optimized power supply and get +9v and +5v at the correct IC pins on the SID module -- so the +5v output of the power supply is confirmed at +5v. However, at some point in the power section of the CORE module the +5v drops to +3.97v. Will that be a problem? As instructed, I used a jumper across the in-out where the 7805 regulator would go and changed C5 to 1000uF instead of 2200uF. Did I misunderstand and a 2200uF capacitor should still be used, causing the voltage drop?

Yes, that's exactly what I was asking -- thanks for confirming!

I've read through the countless PSU questions posted over the past 10 years here, and unfortunately most of them refer to broken links that seemed to answer everyone's questions. Most notably these two: http://www.danielpri...h-diy/sid_2.htm http://www.midibox.o...hp?topic=4455.0 I have a decent amount of experience constructing kits and fixing things, but I've always been a little shaky understanding power supplies and distribution... So my question is: what is the best way to route power from the 5v and 14v headers on the PSU board to multiple destinations? For example, the schematic shows +5v being split and sent to J2 of the SID module(s) and J2 of the CORE module(s). What's the best way to physically make that mult from a single header pin on the PSU board to two or more destinations on other boards? Should I install separate headers on the PSU board for each destination and not one, as represented in the schematic? I realize this is probably super obvious and/or I'm thinking about this the wrong way, but I've been literally researching for days trying to figure out PSU questions and haven't been able to conquer this one... Thanks!