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![]() "Joel Koltner" wrote 1) The really big 450kHz IF transformers you see in tube sets... why did they wind the coils in the form of "pancakes" rather than "the usual way" (single-layer coils)? Is it just a consequence of needing lots of turns (to get enough magnetizing inductance) but, for the coupling coefficient desired, finding that you'd end up with, e.g,. a foot-long tranformer if you only used a single layer? See http://www.crystal-radio.eu/enkoppelfactor.htm |
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