The last KB TRF radio which I am aware of is the KB 810 from about 1940, this was probably the last TRF design that KB made. https://www.radiomuseum.org/r/kolsterbr_810.html
Kolster Brandes prided themselves as making quality affordable radios, and I suppose the TRF principle is one of the simplest ways to make a radio. The later TRF radios that they made were often battery ones, again I suppose the low valve count helped with the battery life. http://www.kbmuseum.org.uk/kb_1934_catalogue.htm
Mike
Kolster Brandes prided themselves as making quality affordable radios, and I suppose the TRF principle is one of the simplest ways to make a radio. The later TRF radios that they made were often battery ones, again I suppose the low valve count helped with the battery life. http://www.kbmuseum.org.uk/kb_1934_catalogue.htm
Mike
