2 x NOS STC Standard S4020A AR12 R87 102D Triode Tube, Strong Test, Vintage Audi
USD 318.03 USD
Specifications
| Country Of Origin | United Kingdom |
| Brand | Standard |
| Type | Triode |
| Model | S4020A |
Standard / S4020A. The Standard S4020A tubes were manufactured in England during the 1920s and 1930s. They are quite hard to find triodes from the golden age of vacuum tubes, and the sound quality is reported to be very, very good.
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