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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Four Voltage References with the LM139 (CB14248E)
The circuit shown below provides four adjustable reference voltages. Each of them is produced by a...
Alarm Siren (CB20327E)
This powerful siren is suitable for warning or alarm systems. The components are current and the...
LM381 Magnetic Head Amplifier (CB25281E)
This circuit was found in the February 1990 issue of Radio Electronics magazine. The circuit uses...