[Amps] SB220 performer

[Tom W8JI]

> hello! my sb220 is not performing as i wanted... and when 
> i checked the voltage on the glow. it should be around 5v 
> AC but its 4.1 volts on the tube pins.i have checked all 
> cabels.but i dont understand.someone perhaps can help me 
> with some ideas?


How do you know the meter is good?

What is the power line voltage?

What is your mains frequency and voltage and which 
transformers does your amplifier have?