Mapleham Study — Chapter 3

Chapter 3 — Key Takeaways

Station Accessories — dummy load, antenna tuner, speech processor, and keyer for testing and optimisation
Power Supply — AC to 13.8 VDC chain; mobile wiring 10 AWG or heavier to limit voltage drop under 0.5 V
Antenna Types — vertical quarter-wave with ground plane, dipole half-wave centre-fed, Yagi with reflector and directors
Transmit Chain Comparison — FM, CW, AM, and SSB transmitter stages and their key differences
Receiver Comparison — FM limiter-discriminator, AM diode detector, SSB/CW product detector with BFO
Bandwidth and Keying — CW narrowest at 100 Hz to FM widest at 20 kHz; electronic keyers for clean Morse
Safety — access control, grounding, correct fuses, and lightning disconnection
RF Exposure — Safety Code 6 guidelines; 30 to 300 megahertz highest risk; eyes especially vulnerable