Note
QST, Jan 1971, p. 135.
QST, Apr 1973, p. 116.
The Varitronics name was associated with Inoue/Icom in the early days of Japanese equipment’s entry into the US market. The PA-50 Class C amplifier was made in the USA by Varitronics Incorporated in Phoenix, Arizona. The 50 watt amp required 5–15 watts drive and covered all of the 2 meter amateur band.
The PA50A is a completely solid-state class-C RF amplifier designed for use in mobile amateur FM applications. Because of internal RF switching, the PA-5OA can be used with any 2-meter transmitter with 5 to 15 watts output.
Balanced emitter semiconductors insure complete insensitivity to high VSWR—even no load conditions.
Power requirements: 13.5 VDC, 5 amps
Impedance: 50 ohms in and out
Spurious products: 50 db down
