National Union 813/VT-144 Beam Power Amplifier Audio Vacuum Tube Valve- Bangybang.tube

Brand

National Union

Model

813

*three different logos, all shown in pictures

Type                                         

 Beam Power Tube

*round plate

Use

• Vf 10 Volts / If 5 Ampere / Direct

• 7-Pin-Base

• Top contact with a cap

Similar/Equiv

Condition

Tested

Tubes per listing

1