Transmitters, Receivers, Antennas, AM, FM
Electronic Circuits for Hobby and Fair Projects

Home Experiments Science Fair Projects
Electronic Circuits
C=Circuit Diagram


1.5V Battery operated FM rebroadcast transmitter [C]
AC mains powered FM transmitter with pre-emphasis, audio level control, and tuning control [C]
A One Transistor FM Radio [C]
2 Transistor FM Transmitter [C]
4 Transistor Transmitter [C]
FM Transmitter with Opamp [C]
FM Stereo Transmitter (BA1404) [C] [C]
Long range FM transmitter [C]
FM Transmitter (Colpitts Oscillator) [C]
FM Transmitter (hartley oscillator) [C]
Powerful AM transmitter [C]
AM transmitter [C]
Surveillance Transmitter Detector [C]
VHF band TV transmitter [C]


The Modern Armstrong Regenerative Receiver [C]
SW Regenereative Receiver [C]
Bipolar Regenerative Receiver [C]
Band 2 Preamplifier [C]
ZN414 Portable Receiver [C]
SW Receiver Using ZN414 [C]
R5000 Receiver Computer Interface [C]
AM Receiver (three transistor, regenerative receiver) [C]
40 meter Direct Conversion AM / SSB Receiver [C]
AM Receiver in two parts [C] [C]
FM receivers basics [C] [C]
A high-performance FM receiver for audio and digital applicatons [C]
Short Wave Receiver [C]


Antenna Tuning Unit [C]
Medium Wave Active Antenna [C]
The ATL-3 Loop Antenna [C]
Q- Multiplying Loop Antenna [C]


Test a LF quartz crystal [C]
Automatic Repeater [C]
UHF TV Preamplifier [C]
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Electronics Discoveries and Inventions
Heinrich Hertz: Radio Waves
Guglielmo Marconi: Radio
Radio and Wireless Patents
Bell: Telephone Invention
The Invention of the Transistor
Konrad Zuse: Relay Computer
The Oil-Drop Experiment

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Last updated: January 2017
Copyright 2003-2017 Julian Rubin