Add to Cart Quick view Matched Pair (2) NOS GE 6550A Tubes Tested / Guaranteed Full Output General Electric MSRP: Now: $99.99 Was: Matched Pair (2) NOS GE 6550A Tubes Tested / Guaranteed Full Output This Matched pair was sold by Antique Radio Supply as a NOS pair so I assume they are NOS, and they test like NOS. This tube and all others, has been tested on a B&K Dynaquick 7,00... 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