Reply to "Let's Look at Some Analog Power Supplies..."

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Here is a Tri.Tec Hogger from my HO days in the 80s. It had Speed, Momentum, Smoothing and Speed range controls. It stopped working so I drilled out the rivets and opened it. No obvious burnt parts. Inside the large sheet metal case was a big transformer and a lot of empty space. A lone circuit board had one IC on it: an LN358N dual op amp. Everything was hand-wired.

If anyone wants to try to fix it, it's yours for the shipping cost or pick up at York

Bob

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