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THE ORIGINAL TRANSISTOR ARE NOW OBSOLETE

SO MODERN REPLACEMENT ARE : BC560C , BD139, TIP35C.

THE 47K TRIMMER HAVE TO SETUP FOR 1/2 VCC ON VX TEST POINT (SEE SCHEMATIC)

FOR THE R1 ,R2 SEE TABLE N.1 ON PDF .

I SUGGEST A 22VAC 160VA TRANSFORMER FOR DUAL MONO VERSION .

A MULTIPLIER CAPACITOR POWER SUPPLY IS A PERFECT PSU FOR THIS AMPLIFIER

JLH AMPLIFIER CLASSE A