Multimode filters, Part 2: Pole-mixing filters – Electric Druid
High Pass Filter - Passive RC Filter Tutorial
Mac Cody on Twitter: "My Ebay order of four 0.8-4.5pF piston trimmer capacitors arrived Friday. Using three for a three-pole, microstripline band pass filter for the 23-cm band. Design by WA6UAM in
Experimentalists Anonymous DIY Archives
Understanding Lumped Element Filters - Mini-Circuits Blog