Radio and Electronics Cookbook

A medium-wave receiver; An audio-frequency amplifier; A medium-wave receiver using a ferrite-rod aerial; A simple electronic organ; Experiments with the NE555 timer; A simple metronome; What is a resistor?; Waves - Part 1; A beat-frequency oscillator; What is a capacitor?; Waves - Part 2; An LED flasher; Waves - Part 3; Adding the 80 metre band to the Yearling receiver; Choosing a switch; An aerial tuning unit for a receiver; Simple 2 m receiver preamplifier; Receiving aerials for amateur radio; The Colt 80 m receiver - Part 1; A crystal radio receiver; The varactor (or varicap) diode; A portable radio for medium waves; The Colt 80 m receiver - Part 2; A simple transistor tester; An introduction to transmitters; The Colt 80 m receiver - Part 3; A two-way Morse practice system; The Colt 80 m receiver - Part 4; A simple crystal set; A crystal calibrator; A simple short-wave receiver - Part 1; A fruit-powered medium-wave radio; A capacitance bridge; A simple short-wave receiver - Part 2; A basic continuity tester; A charger for NiCad batteries; An 80 metre crystal-controlled CW transmitter; A solar-powered MW radio; A receiver for the 7 MHz amateur band; Diodes for protection; An RF signal probe; An RF changeover circuit; A low-light indicator; A J-pole aerial for 50 MHz; Measuring light intensity - the photometer; A 70 cm Quad loop aerial; A UHF field strength meter; Christmas tree LEDs; An audio signal injector; Standing waves; A standing-wave indicator for HF; A moisture meter; Simple aerials; A breadboard 80 cm CW transmitter; A 7-element low-pass filter for transmitters; Radio-frequency mixing explained; A voltage monitor for a 12 V power supply; A 1750 Hz toneburst for repeater access; A circuit for flashing LEDs; Digital logic circuits; A resistive SWR indicator; An audio filter for CW; An electronic die; The absorption wavemeter; An HF absorption wavemeter; A vertical aerial for 70 cm; A UHF corner reflector aerial; A switched dummy load; A simple Morse oscillator; A bipolar transistor tester; The 'Yearling' 20 m receiver; How the Yearling works; A field strength meter; Preselector for a short-wave receiver; An audible continuity tester; An experimental 70 cm rhombic aerial; Water level alarm; A delta loop for 20 metres; A simple desk microphone; Morse oscillator; A simple 6 m beam; An integrated circuit amplifier; A novice ATU; CW QRP transmitter for 80 metres; An audio booster for your hand-held; A grid dip oscillator; A CW transmitter for 160 to 20 metres; Matching the end-fed random wire aerial; Radio-frequency mixing explained.