The Bush AC34 is a classic British valve radio dating from 1953–1954, manufactured by Bush Radio Ltd. It is a handsome, mains-powered table radio from the period when wireless sets were a central feature of the British living room. Its design is typical of the early 1950s, with a walnut-veneered cabinet, a lighter wooden strip surrounding the four control knobs, a large loudspeaker behind a metal mesh grille and an illuminated glass tuning scale.
One unusual feature is that the AC34 uses valves with series-connected heaters but incorporates a mains transformer. Bush also produced the related DAC34, which was designed for AC/DC operation.
Valves
- UCH42 – frequency changer: oscillator and mixer
- UF41 – intermediate-frequency amplifier
- UBC41 – detection, automatic gain control and audio amplification
- UL41 – audio output amplifier
- UY41 – high-voltage rectifier
SERVICE MANUAL PREVIEW
The original Bush service manual for the AC34 and DAC34 is available to members. Here's a taste of what's inside.
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 AC34 and the DAC34
- Capacitor, resistor, coil and transformer values with Bush part numbers
- Step by step IF and RF alignment
- Valve voltages and currents
- Coil deck connections and dismantling
- How to fit a new cord drive
- Labelled photos of the top and underneath of the chassis
