23-05-2024, 08:50 PM
(23-05-2024, 08:37 PM)Geordie McBoyne Wrote: Information from the 1962 Mullard Maintenance Manual.
So 5W on Pentode, 1W on Triode and 4.5W = 10.5W
Looking at the powers and gain, my idea of about 100V HT (or a bit more) and triodizing pentode, suitable resistors on cathode might work as Class B. Then you'd get about 4W audio and higher efficiency and able to use a regular mains transformer as low bias which cancels anyway.
Rule of thumb for class B push pull (or slightly class AB) is that the max power is about x4 of one device.
A 5W single ended Class A will use 10W of HT and need a real audio transformer able for the bias current.
