AIUI, when soldering to an enameled wire, there is no need to remove the enamel first. It just burns up and disappears when one is applying the solder. Is that true?
Otherwise, are there any tricks to repairing a small transformer** such as used to power an audio device such as a clock radio from 110VAC: I take the cover off and the first layer of "tape" and if there is only a half inch of wire going to the priamary winding, and if when I try to solder to it, it breaks off just as it goes into the winding, under other stuff, I haven't been able to fix them in the past. But maybe there is a trick I don't know.
**The one in question today has 3 secondary windings, green-yellow-green, red-red, and blue-blue. Does that indicate what the output voltages should be?
It's 1 3/4 x 1 3/4 x 1 1/2 inch and it runs a high-quality Panasonic, clock-radio, sterero cassette player/recorder. Model 680-3870
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