The Kolster Brandes RB10 is a small a.c mains valve radio. It was made in 1960, and has long & medium wave band reception. The wave change switching is very delicate, my switch bank had to be replaced as it had been previously damaged.
The KB RB10 is the same model of radio that our family had at Lulworth Crescent, Leeds 15. I remember the appearance of it very well from the early 1960's.
The RB10 has printed circuit board technology, and employs the following valves:-
12BE6, 6BJ6, 12AT6, 19AQ5. It also has a metal rectifier, which has been replaced with a silicon rectifier and a resistor. The valve heater chain is unusual as it is split between the double pole mains switches, two valves on one side and two on the other. It has been claimed that this has the effect of reducing the vale of the mains dropper resistance, the total power consumption & operating temperature of the radio.
A distinctive looking "duck-egg" blue cabinet, with equally distinctive coloured control knobs & buttons. Not many of these are seen at expositions. There was a transistorized version in an orange/brown cabinet