RF filter design is a piece of cake these days thanks to computer design and simulation tools. But actually realizing the simulated filter response in the real world can be a completely different matter! This video provides an introduction to practical RF filter design by building, testing, and tweaking a 137MHz bandpass filter suitable for NOAA APT satellite reception.
References and additional reading:
|Designing a high-Q VHF bandpass filter||A VHF Bandpass Filter for the QST Spectrum Analyzer, Wes Hayward, W7ZOI|
|Enameled wire capacitors||Capacitance of a Wire Above a Foil, Wes Hayward, W7ZOI|
|Tutorial on double tuned bandpass filters||The Double-Tuned Filter: An Experimenter’s Tutorial, Wes Hayward, W7ZOI|
|Air core inductor Q||The Elusive Q of Single-Layer Air-Core Coils, George Murphey|