|Kits and Parts dot Com|
|Supplying Toroids, Electronic Parts and Kits to Engineers, Schools and Hobbyists|
using the below pictured PCB
The PCB can handle toroid inductor sizes up to T80-xx
This is not a kit but only a PCB.
You decide which additional components you need for your filter(s).
Below is several links to some good reading and recommended component values for specific filter types.
Introduction to LPFs by Paul Hardin, NA5N
2nd-Harmonic-Optimized LPFs by By Ed Wetherhold, W3NQN
7 Element Chebyshev standard value capacitor LPFs
Additional reading and component calculators...
A Filter Calculator
A Butterworth Lowpass Calculator
A Chebyshev Lowpass Calculator
Another Butterworth Lowpass Calculator
Another Chebyshev Lowpass Calculator