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
A