Yeah. This thing is still a linear, but it's way more intelligent than I am used to. It's also riddled with really confusing design choices. Four-Phase themselves did not like these supplies, but never replaced it with something better.

Unfortunately no schematics for the IV/70's power supply are known to exist. When I had it apart for cleaning and recapping I took really nice photos of everything, but that's all I really have in terms of technical details.

And it still doesn't want to work. The +5 will not regulate down from 7v with a dummy load and I don't even know what the appropriate bench configuration is for testing. I really wish I knew people locally who were more experienced with linear power supplies.

I've seen the simulated ones recently but they are too expensive to be in "buy it and mess around with it for a while" territorry.

This came across as sounding mean but really, an over-moderated community is just as bad as a community that has no moderation. The feedback feels synthetic. There is no direct criticism and if the discussion starts with a canned reminder of the rules, the discussion can't evolve into anything else.

Covid did weird things to the older supply chain. Bleh.

Prior-warning: I ran out of time on editing this week's actual video so if you notice a slight set continuity error, that is because this was recorded almost three years ago.

It did.

83? 85?

One was up for sale last year on ebay, IIRC.
It went for silly money.

Thank you too! :D

I was given this map as part of a gift from Lynn Lake. I've scanned the entire booklet and put it on IA since these coverage maps are neat to look at from the days before the cellular telephone.

archive.org/details/MTSG...

You finally got it working! :D

I cannot believe just how far the leakage spread on your machine. It almost feels like it was stored on its side.