Four 5687 Vacuum Tubes RCA (Bronze) T-S & ? Amplitrex Tested Strong!!
USD 55.00 USD
Specifications
| Type | Vacuum Tube |
| Country Of Origin | United States |
Lot of four 5687 vacuum tubes - Two RCA bronze plate support rod tubes, one 5687WA, and one Tung-Sol. Amplitrex tested 79-138% Gm as shown. 100% represents what you would expect from a NOS tube on our Amplitrex and 65% is considered too low to use.
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