Add to Cart Quick view Electron Tube Co Pair (2) 810 Vacuum Tubes, High Power Transmitting Triodes NOS Electron Tube Co MSRP: Now: $99.99 Was: This Electron Tube Co. Pair (2) 810 Vacuum Tubes, High Power Transmitting Triodes, are NOS They were likely made by Shu Guang in China, under the Electron Tube Co. brand. **All the tubes... MSRP: Now: $99.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $99.99 Was: Subtotal: Add to Cart