Saturday, May 16, 2026

AWA: Model PA-806, 5w Valve PA Amplifier

Such an awesome looking little amp from 1954.  Photos from an online listing, I am yet to track one down in person.

For a simple single-ended 6V6 based amp, it's an interesting circuit.

AWA MODEL PA-806 PA AMPLIFIER

Standard inputs and controls for a small Australian PA amp from AWA.  Inputs for a mic, turntable input (PU) with a simple tone control.  No power switch, or fuse.

6AV6 microphone input stage (single triode)
12AX7 mixing / gain stage.  Grid leak biased, negative feedback from OT.
6V6 single-ended output stage, 5 watt
6X4 full-wave valve rectifier

Power Transformer: TS2525823
Power for the rectifier and 6.3v heaters
B+ ~360v

Output Transformer:  1T357100
600, 300 and 150ohm windings on the secondary (plus winding for negative feedback)

This model has also been well documented here

AWA MODEL PA806 PA AMPLIFIER - Front panel

AWA MODEL PA806 PA AMPLIFIER - rear panel

AWA MODEL PA806 PA AMPLIFIER

AWA MODEL PA806 PA AMPLIFIER



AWA MODEL PA806 PA AMPLIFIER - internal photo of circuit

AWA MODEL PA806 PA AMPLIFIER - internal photo of valves

AWA MODEL PA-806 SCHEMATIC

AWA MODEL PA806 VALVE AMP - SCHEMATIC






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