Just building an SC/Jaycar Theremin into a full size case and I need to know how to calculate and wind an air cored linearisation coil for the pitch antenna.
From what I can work out... I should need about 9mH to 10mH air core coil. To work with my Pitch Antenna, which is 3/8" diameter and 18" Long.
I have some winding wire on hand that is 0.25mm so to save on the costs I plan to use this.
I have no idea however, how large a diameter the core should be or how many turns of this diameter wire I will need to achieve 9mH or 10mH..... Can anybody advise me how to work that out please??
Julian (Fozzy The Bear)