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Series-tuned Colpitts (Clapp) oscillator.
Coil: 250 turns 3/4" long on a 1/2" diameter form, scramble wound. Should give roughly 600uH of inductance. Cap: 100pF varable parallel with enough capacitance (determined experimentally) to give you an Fc of 465 KHz with the variable cap at 50%. -- Gregg *It's probably useful, even if it can't be SPICE'd* |
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