Mapleham Study — Chapter 8

Chapter 8 — Key Takeaways

Overload, Harmonics, Intermodulation — overload affects any frequency, harmonics on precise multiples, intermodulation from signal mixing
Audio Rectification and RFI — semiconductor junctions act as detectors, ferrite cores on leads block RF, common-mode choke on feedline
Spurious Emissions and Key Clicks — unwanted signals at other frequencies, key clicks from sharp waveform or sparking at key contacts
Harmonic Radiation and Splatter — energy at integer multiples, low-pass filter suppresses harmonics, splatter from overmodulation
Filter Types — low-pass, high-pass, band-pass, notch, and band-reject filters each with specific pass and stop characteristics