Originally posted by baroutologos
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with above experiment of yours you will never change the frequency !!!
Don Smith is able to correct the frequency because it is not fixed, the Neon Sign Transformer will change it's free running 18Khz according to load.
Any coil has intrinsic capacity and will act differently (building up magnetic field around itself) if you shunt it's terminals with a resistor comparable in value with intrinsic resistance of that coil, just think about the Q factor.
Peace.
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