Bush AC11

Bush AC11 radio. Walnut cabinet with speaker cloth on either side of a central black tuning scale and four brown knobs along the bottom

The Bush AC11 is a British wooden-cased valve radio made around 1949–50. It receives long, medium and short wave broadcasts and has a socket for a gramophone pickup. Some versions also have connections for an external aerial, earth and extension speaker.

It uses five valves: UCH42, UF41, UBC41, UL41 and UY41. Despite the valve types, the AC11 is an AC-mains model with a mains transformer. The related DAC11 is a different version associated with DC/AC operation.

SERVICE MANUAL PREVIEW

The original Bush service manual for the AC11 and DAC11 is available to members. Here's a taste of what's inside.

Front cover of the Bush AC11 and DAC11 service instructions, with a photo of the receiver
Front cover
Circuit diagram of the Bush AC11
Circuit diagram
Top view of the chassis with parts labelled
Top chassis view
Underneath view of the chassis with components labelled
Underneath chassis view

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

The manual includes:

  • Circuit diagrams for both the AC11 and the DAC11
  • Capacitor, resistor and coil values with Bush part numbers
  • Valve data and mains transformer details
  • Step by step IF and RF alignment
  • Servicing notes for tracking down faults
  • Wiring diagram of the coil deck
  • How to dismantle the set, fit a new cord drive and replace the scale
  • Photos of the top and underneath of the chassis

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