Note
QST, May 1962, p. 131.
CQ, May 1962, p. 23.
QST, Dec 1962, p. 131.
The HG-303 is a self-contained, 75-watt multiband transmitting equipment manufactured by Globe Electronics Co. (a division of GC-Textron Electronics Inc.) located in Rockford, Illinois.
Frequency Coverage: 80, 40, 20, 15, and 10 meters.
The RF section utilizes a two-stage layout. The first stage uses a 6CL6 tube functioning as a Pierce harmonic oscillator for crystal control, or converted to a harmonic amplifier when using an external VFO. The power amplifier stage uses a 6146 beam tetrode tube running as a Class C amplifier with a DC power input of 75 watts, employing a Pi-section matching network that covers antenna impedances from approximately 50 to 600 ohms.
The 303 contains three separate power supplies utilizing solid-state silicon rectifiers. It provides 600 volts DC for the power amplifier, 225 volts DC for the oscillator, and a bias supply providing -65 volts DC for operating/protective bias and -130 volts DC cutoff bias for keying.
– Power Input: 75 Watts to the power amplifier.
Primary Power Source: 110/120 VAC, 50/60 Hz.
Power Consumption: Tune: 75 Watts; Stand-By: 50 Watts; Operate: 150 Watts.
References
Brief description. Electronics World, Jun 1962, p. 103.
