Bypass the volume control
Replace cheap coupling caps
Replace cheap resistors in signal path
This is a great start. The power supply could also be improved by using more capacitance, using chokes instead of the power resistor .....
Use good solid core copper wire.
I have done this plus more to great effect.
Replace cheap coupling caps
Replace cheap resistors in signal path
This is a great start. The power supply could also be improved by using more capacitance, using chokes instead of the power resistor .....
Use good solid core copper wire.
I have done this plus more to great effect.