03-04-2024, 09:13 PM
Mullard version £10 10s in No. 1949
Bush DAC90A £12 1s 8d (brown, cream was 15s 1d more) in Feb 1950. It's similar style to 1946 DAC 90 which ran too hot because it was C series 200mA ocatal valves, though also probably mostly Philips (Mullard in UK) designed valves: CCH35, EF39 EBC33 CL33 (like a series version of 6V6) CY31. The Cx3x Series not used in many sets, from 1940 to 1949. Replaced by Ux4x series from 1948. Those in turn by Ux9x noval series in early 1950s.
The US used octal and then 150mA B7G rather than 100 mA series due to lower line voltage. I doubt they used Rimlock at all.
Bush DAC90A £12 1s 8d (brown, cream was 15s 1d more) in Feb 1950. It's similar style to 1946 DAC 90 which ran too hot because it was C series 200mA ocatal valves, though also probably mostly Philips (Mullard in UK) designed valves: CCH35, EF39 EBC33 CL33 (like a series version of 6V6) CY31. The Cx3x Series not used in many sets, from 1940 to 1949. Replaced by Ux4x series from 1948. Those in turn by Ux9x noval series in early 1950s.
The US used octal and then 150mA B7G rather than 100 mA series due to lower line voltage. I doubt they used Rimlock at all.
