I changed
1- the volume pot with GP
2- Coupling cap (2 each per amp .22uF) with JFX - Premium Metallized Polypropylene Film Capacitors
3- Feedback cap 1 each 2.2uF with JFX - Premium Metallized Polypropylene Film Capacitors
4- 6 resistors in signalling path (each amp) 2.2kOhm 2watt
5- Roll with KT-120s power tubes
1- the volume pot with GP
2- Coupling cap (2 each per amp .22uF) with JFX - Premium Metallized Polypropylene Film Capacitors
3- Feedback cap 1 each 2.2uF with JFX - Premium Metallized Polypropylene Film Capacitors
4- 6 resistors in signalling path (each amp) 2.2kOhm 2watt
5- Roll with KT-120s power tubes

