I bought a used QMX, and the seller forgot if it was a 9V or 12V, he had built so many and lost track.? I opened it, took a picture of T501 from the side with my phone, and enlarged the picture.? Made it easy to count the number of turns and verify it was a 9V.??
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Then I hooked it up to a 9V source and got 4-5 Watts out at about 1 Amp into a dummy load, which confirmed 9V behavior.
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73
Mike N9OHW
