The KB ER30 is a British Kolster-Brandes wooden-cased table radio, listed as a 1949 model. It’s a six-valve superhet with a large 10-inch speaker, covering medium wave, long wave and short wave. Its valve line-up is 6K8GT, 7R7, 6SL7GT, 6V6GT, 6U5G tuning indicator and 6X5GT rectifier.
The ER30 runs from 200–250 V AC and is rated at up to 3 W output. The ER30T is a related export version, so check the model plate before relying on details for that variant.
SERVICE MANUAL PREVIEW
The Trader service sheet for the Kolster-Brandes ER30, which also covers the FG20 autoradiogram and the radio unit in the FT50 television, 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 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
- Diagrams of the waveband switch units, with a table of switch positions
- How to dismantle the set
- How to replace the drive cord
- Step by step circuit alignment
- Drawings of the top and underside of the chassis
