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Trimmer Capacitors
NPO Disc Capacitors
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Crystals - Matched
W3NQN Filters
WA2EBY Toroid Kit
Variable Inductors
Magnet Wire
Diodes
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Jacks Plugs
Transistors - Fets
Misc Parts
RFtoolkits
Organic 5Watter Kits
Transceivers for 17,20,30,40 Meters
Universal Receiver
1Watter-30m QRPp Xcvr
1Watter-160m QRPp Xcvr
Toroids
Retired Kits
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FAQ
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