United States of America

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Bencher	Central Scientific	E.F. Johnson	Electric Specialty Mfg	Electro Mfg
Hamco	Ham Key	Heath	JFC Elex Inc	J.H. Bunnell
Lafayette Radio	L.G. Tillotson	Les Logan	Lionel	Manhatten Electrical Supply
McElroy	MFJ Corp	Miscellaneous	NorCal	Ohio Electric
Signal Electric	SPEED-X	Ten-Tec	Thompson	US Army
US Navy	Vibroplex	Western Electric	Whiterook	Cootie Keys