What can be ruled out if the triumph tube radio is not good in high and low tones?

Replacing the tone potentiometer can eliminate it. According to official website's public comments, the aging of the tuning potentiometer of Kaige Electron Tube Radio leads to poor contact, and it will be impossible to adjust the high and low tones. Replacing the tuning potentiometer can eliminate the fault. Electron tube radios were first produced in the United States in 1906. Due to the continuous development of technology and the appearance of transistors, electronic tubes have been replaced by transistors, and electronic tube radios have become people's collections.