International Mail Service SuspensionsUniversal Low Pass Filter Kit Ver.1.5Universal Low Pass Filter Kit Ver.1.5Universal Low Pass Filter Kit Ver.1.5
Kits and Parts dot Com
Supplying Toroids, Electronic Parts and Kits to Engineers, Schools and Hobbyists

Create Quote
Place Order
Customer Portal
Trimmer Capacitors
NPO Disc Capacitors
Polystyrene Capacitors
Silvered Mica Capacitors
Crystals - Matched
W3NQN Filters
WA2EBY Toroid Kit
Variable Inductors
Magnet Wire
Integrated Circuits
Jacks Plugs
Transistors - Fets
Misc Parts
Organic 5Watter Kits
Transceivers for 17,20,30,40 Meters
Retired Kits
SMT Parts
Build a 7-pole Universal Low Pass Filter for HF
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

Toroids, Ferrites