Ultra model 26 valve radio

Ultra 26 radio. Walnut cabinet with a dark speaker cloth crossed by two black bars, a square cream tuning dial with black louvres either side and three knobs below

The Ultra Model 26 is a British four-valve superheterodyne radio introduced in 1936 by Ultra Electric Ltd. It is an attractive example of mid-1930s British wireless design, with Art Deco influences and a polished walnut cabinet.

Ultra was a respected British radio manufacturer, and the Model 26 was marketed as a De-Luxe Super-Het, offering relatively sophisticated reception without requiring a large number of valves.

SERVICE MANUAL PREVIEW

The July 1936 Service Engineer sheet for the Ultra 26 AC/DC superhet is available to members. Here's a taste of what's inside.

The Service Engineer sheet for the Ultra 26, with a photo of the radio
Front page
Circuit diagram of the Ultra 26 AC/DC superhet
Circuit diagram
Diagrams showing where the components sit on top of and inside the Ultra 26 chassis
Chassis diagrams
Alignment notes and valve readings for the Ultra 26
Alignment and valve readings

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
  • Resistor and condenser values
  • A description of the circuit
  • Valve readings
  • Step by step alignment notes
  • How to remove the chassis
  • Diagrams of where the parts sit on the chassis

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