Telecom

Articles
Title
High-Power AM Tube Transmitter (TEL009E)
FM Transmitter Using a Vacuum tube (TEL008E)
High-Power Push-Pull FM Transmitter (TEL007E)
Project Shortwave Telegraphic Transmitter (TEL006E)
Small AM Transmitter (TEL005E)
Three-Transistor FM Transmitter (TEL004E)
Small FM Transmitter (TEL003E)
Electromagnetic Interference – EMI (TEL002E)
Small FM Transmitters (ART002E)

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5 MHz VFO (CB8640S)
Found in a 90s QST magazine, this circuit uses components from that time. No information is given...
Unijunction Bistable (CB16912E)
This circuit, from ancient French documentation, produces a rectangular pulse from input pulses...
Tunnel Diode Transmitter (CB19425E)
This low power circuit for the FM band was found in a spy book from the 90s. The tunnel diode is...