Pye QAC3

Pye QAC3 radio. Walnut cabinet with black vertical bars across the top and front, a black tuning scale with crossed wavelength lines and four brown knobs

VALVE LINE UP
V1 A36A
V2 A50P
V3 A23A
V4 A70D
V5 A11D
Magic eye A39A

The Pye QAC3 is a British five-valve tabletop superheterodyne radio from 1937. It covers three bands: short wave, medium wave and long wave. The shortwave range is about 5.7–19.4 MHz, including frequencies used by radio amateurs. It was made for AC mains, with a voltage range of 100–250 V.

SERVICE MANUAL PREVIEW

The Trader service sheet for the Pye Q.AC3, with the original Pye service notes, is available to members. Here's a taste of what's inside.

First page of the Trader service sheet for the Pye QAC3
Front page
Circuit diagram of the Pye QAC3
Circuit diagram
Photo of the underneath of the Pye QAC3 chassis showing the switch unit
Under-chassis view
Plan view of the Pye QAC3 chassis with the components labelled
Plan view of the chassis

These pictures are faded on purpose, just for this preview. Members get the complete service sheet, unfaded, to view and download.

The service sheet includes:

  • The full circuit diagram
  • Component values, with where to find each one on the chassis
  • Valve analysis, with the voltages and currents
  • Switch positions
  • Step by step circuit alignment, with a summary of the trimming procedure
  • How to remove the chassis and service it outside the cabinet
  • How to replace the tone, volume and gang drive traces and the dial bulbs
  • Photos of the top and underneath of the chassis

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VINTAGE RADIO INFORMATION SITE.

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