5 Vintage Heintz & Kaufman 90C1/StR90/40/0H3 Voltage Regulator Discharge Audio Vacuum Tube Valve- Bangybang.tube

Brand

Heintz and Kaufman

Model

Type                                         

• Operating current range: 1to 40mA.

Similar/Equiv

• N/A

Condition

New in Box (NOS)

Tubes per listing

5