4PCS Shuguang EL34-B Electron Tube Paired Audio Vacuum Tube For 6CA7
4PCS Shuguang EL34-B Electron Tube Paired Audio Vacuum Tube Replace 6CA7 Fit Tube Amplifiers. The difference between EL34A and EL34-B: EL34 series have two tube types: EL34A and EL34-B. EL34-B is the accurate grid of g1 and g2.