Bush AC91

Bush AC91 radio. Dark brown Bakelite radio with a cream tuning scale across the top, a round speaker grille below it and a knob at each sideThis AC91 radio is quite rare. It’s similar in appearance to the DAC90 but it covers short wave as well as long and medium wave.

RADIO SPECIFICATIONS

Manufactured from 1946
Long Medium and Short Wave
Valves – CCH35 – EF39 – EBC33
CL33 – CY31
AC Supply

SERVICE MANUAL PREVIEW

The original Bush service manual for the AC91 and DAC91 is available to members. Here's a taste of what's inside.

Front cover of the Bush AC91 and DAC91 service instructions, with a photo of the receiver
Front cover
Circuit diagram of the Bush AC91
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:

  • The full circuit diagram, with a quick reference table of component values and valve voltages
  • 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
  • How to dismantle the set and fit new wire drives
  • Labelled photos of the top and underneath of the chassis

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