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PLEASE NOTE THAT THE CONNECTON OF THE FILAMENTS FOR THE 300B's ARE INCORRET. SIMPLY SWITCH ONE 300B FILAMENT AROUND SO THE NUMBERS MATCH. THAT IS, WHITE FOR PIN 1 AND YELLOW FOR PIN 4 OF BOTH 300B TUBES.


 

BELOW IS THE COMPLETE PROTOTYPE. MOST OF THE AMPLIFIER IS THE SAME WITHOUT THE FEEDBACK CIRCUIT WHERE THE GREEN WIRES GO FROM THE HUM POT (NOTICE NOTES IN PICTURE ABOVE). NOTICE TOO THE CORRECTION OF THE FILAMENT WIRES TO THE 300Bs.