Vintage RCA 931VA/27M1/CV337 9 stage Photomultiplier PMT Audio Vacuum Tube Valve- Bangybang.tube

Brand

RCA 

Model

Type                                         

• 9 stage Photomultiplier
• Peak spectral response 4500 Å
• Base 11pin Sub Magnal
• No heater

Similar/Equiv

• Non-hygroscopic base version of the 931A

Condition

New in Box (NOS)

Tubes per listing

1