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[1431]

hi. I would like to construct a Chebyshev 5-Element Low-Pass Filter (between linear and antenna) for 1431 khz. I would like to use standar capacitor values, which are easy to find. My problem is to find how many turns with 2mm diameter wire i need for the two coils of the filter. The filter is for an experimental univerisity radio station. I need to use 2mm diameter of wire, because the linear have maximum output 500watt. thank you very much.

[K6AER]

Due to the ampunt of inductance needed you might want to considder using toroids in your design. Your filter drop off will not be that sharp. You did not mention what the rejection should be at one octive.

You can use the calculator at:

http://www.calculatoredge.com/electronics/ch%20pi%20low%20pass.htm