Tung-Sol 12AX7 New Production Preamp Vacuum Tube $28.95 JJ 5Y3S Rectifier Vacuum Tube $22.95 JJ 6L6GC Power Vacuum Tube $26.95 Reviews Technical Documentation These are rugged tubes, even though they are cheap in price. Tubedepot put the bias # on the box, and I hadn't asked, nice....