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WQ6X.Info Company Histories via Wikipedia

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American Radio Manufacturers	Transciever Manufacturers	Shortwave Radio Manufacturers	Radio Antenna Manufacturers	Other Equipment Manufacturers
Hallicrafters	Eico	Allied Radio	Alpha Delta	Acom Amplifiers
Hammarlund	Elecraft	Grundig	Butternut	Alpha Amplifiers
Drake Radios	Flex Radio	Knight Radio	Comet	Ameritron Amplifiers
Viking Radios	Galaxy Radios	Lafayette Radio	Cushcraft	Dentron Amplifiers
Signal One	Heathkit Radios	Panasonic	HyGain	Tokyo Hy-Power
Gonset Radio	Icom Radios	Radio Shack	Hustler	Heil Sound
Collins Radios	Kenwood Radios	RCA	Mosley	MFJ Enterprises
National Radios	NRD Radios	Sangean	Amateur Antennas	Vintage Amateur Radio
Swan Electronics	Ten Tec	Sony	Antenna Towers	Radio Test Equipment
Cubic Communications	Yaesu Radios	Zenith	Antenna Rotators	TimeWave Equipment