Radiola 28 (DC)

[Winky Dink]

Ultimately I'll be building or buying an AC power supply for this radio. In the meantime, I've spent 3 days trying to figure out the existing battery eliminator, which I thought would be very simple. In fact, when I started this project I thought that a battery radio would have three batteries, as simple as A-B-C.

I've been trying to trace circuits, but I'm often foiled because the lines runs into the "permanently sealed catacomb" and the wire colors are not readable. So please give me a clue. Here is a photo of the battery eliminator, an illustration of the same, the battery setup, and the continuity diagram.









(1) What do the power supply terminals 1, 2, 3, -A, -B+A, etc. represent? (Note to SciFi fans: don't tell me, "It's a cookbook!")

(2) The answer to the second question should be obvious, but I can't see it. After I connect the input to 110VAC, how do the electrons get into the black box? What are the input terminals supposed to connect to?

Anyone who can help me will be rewarded with total enlightenment during his or her lifetime.

- Winky