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I've been listening to this radio on batteries lately. Red is B+, black is a common, and the radio works with A+ on green (haven't tried red B+, black B- A+, green A-).
The radio seems to hold its own in a side-by-side comparison with my Zenith H500Y, except the top of the SW band where the Zenith is better.
It will need an alignment -even the AM band is off about 100kHz at the top (possibly realigned by whoever had put the 1R5 in it. SW did not work at all with the1R5, and I've replaced it with the proper 1L6).
Still don't have a schematic for it yet.
It shouldn't be too hard to restore house current operation, as the values on the electrolytics are marked, and diodes easy to acquire.
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