I came by pure luck on a web site written by Kurt van Lilienthal Heitmann Thaaning Steffensen. A large collection of 100 amplifiers schematics and descriptions, starting from "The Audion by Lee DeForest, 1907", until "Luxman MQ-50, 6550 PP, Stereo, 1983". I'm not qualified enough to estimate the quality of the analysis but from what I read the author seems to knows his business.
Some gems in there :
Some gems in there :
- EL6471 is a typical example of such amplifier. It is a class B power amplifier rated at 1000 Watts and it runs at about 3200 Volts. The weight of this monster is 155 kg.
- Altec 260A, 813 PP 1956, now, we are talking…Look at this at this thing…1,2V RMS at the input terminals and you will have some 260 freaky ALTEC Watts to feed your speaker !
I had found his pages previously, and enjoyed his analysis and comments. I've had some minor communication with him and encouraged him to carry through with his tease about a thorough Williamson article. He expressed some concern about the quality of his English which, given how well he writes in a language which is not his primary one, amused me. I am constantly impressed by how well many Europeans communicate in English while I, as an inhabitant of an officially bilingual country, can only function in one.