WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
Well thank you for all your help with this matter.
I have changed the cathode resistors to 270 ohms and it now sounds quite sweet .
The next thing to do is to connect a square wave signal generator and oscilloscope and tweak the circuit