Determine AM Modulation with an Oscilloscope 

Use an oscilloscope to determine the modulation of an AM transmitter.

Tower Light Alarm Circuit 

This pseudo-binary circuit allows a single remote-control telemetry channel to indicate several variations on circuit status.

Starguide Relay Logger 

A utility to help diagnose contact closure and configuration errors for a Starguide broadcast satellite receiver. ZIP file.

StarGuide Relay Logger 

A utility to help diagnose contact closure and configuration errors for a StarGuide broadcast satellite receiver. ZIP file.

FCC ID Number Lookup 

Identify computer cards and other electronic components by their FCC ID number.

Tower Light Flasher Failure Alarm 

A simple interface and flash-failure circuit to interface to a station's remote control.

SCA Primer for Broadcasters (2002 edition) 

FM subcarrier services can be source of revenue for an FM station. They can also be a source of aggravation if not maintained properly.

SCA Primer for Broadcasters (2002 edition) 

FM subcarrier services can be source of revenue for an FM station. They can also be a source of aggravation if not maintained properly.

Electrical Concepts and Practices - a Primer 

A collection of articles from Radio magazine's sister publication EC&M.

Western Electric 111C and 119C Transformer Information 

Pinouts and schematics for these popular, high-quality audio transformers.

Western Electric 111C and 119C Transformer Information 

Pinouts and schematics for these popular, high-quality audio transformers.

Variation on the Shielded-Loop AM Antenna 

A variation on the antenna’s construction.

Variation on the Shielded-Loop AM Antenna 

A variation on the antenna's construction.

Electronic Symbols True Type Font 

A True Type font set with electonic symbols.

Braided Shield Cable Preparation 

A simpler, cleaner method of preparing a braided shield for a connector.

Braided Shield Cable Preparation 

A simpler, cleaner method of preparing a braided shield for a connector.

Baking Magnetic Recording Tape 

Temporarily restore old tape for playback.

Baking Magnetic Recording Tape 

Temporarily restore old tape for playback.

Push-on/Push-off Switch 

Turn a momentary closure into a maintained contact.

Push-on/Push-off Switch 

Turn a momentary closure into a maintained contact.

Lattice Combiner/Splitter 

Build a lattice combiner/splitter.

Shielded-Loop AM Antenna 

Build a shielded-loop AM antenna.

AES3 Passive Converters 

Build passive AES3 balanced-to-unbalanced and unbalanced-to-balanced converters.

AES3 Passive Converters 

Build passive AES3 balanced-to-unbalanced and unbalanced-to-balanced converters.

Shielded-Loop AM Antenna 

Build a shielded-loop AM antenna.

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