2 x NOS STC Standard S4020A AR12 R87 102D Triode Tube, V.GOOD, Tested, Vintage A
USD 272.10 USD
Specifications
| Country Of Origin | United Kingdom |
| Brand | Standard |
| Type | Triode |
| Model | S4020A |
S4020A - 102D - 4020A - AR12 - R87 - 3A/108A - 4631 - CV1664 - SY4020A. Standard / S4020A. These Standard tubes were manufactured in England during the 1920s and 1930s. They are a very hard-to-find triode from the golden age of vacuum tubes, and the sound quality is reported to be very, very good.
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