1 NOS MULLARD UBC81 SINGLE-TUBE BLACKBURN U.K. RARE SILVER-MESH-CAGE TUBE
USD 70.00 USD
Specifications
| Country Of Origin | United Kingdom |
| Brand | Mullard |
| Type | NOS Tube |
| Tube Type | ECH81 |
| Product Type | Select AMPLITREX TESTED |
| Model | ECH81 6AJ8 |
| Factory | BLACKBURN |
| Country Of Manufacture | ENGLAND |
| MPN | ECH81 |
NOS is subject to interpretation and there is no specific definition for it either. There are suggestions and opinions. Tube testers do not test for these problems in the manner in which you think, except to the extent that a tube tester with sensitive leakage detection will find far more “noisy” tubes than a tube tester with only “fair” leakage sensitivity, to the extent that the noise is due to this problem.
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