Add to Cart Quick view Taylor Matched Pair of 572B Amplifier Vacuum Tubes NOS 2002 Date Codes Taylor MSRP: Now: $174.99 Was: Taylor Matched Pair of 572B Amplifier Vacuum Tubes NOS 2002 Date Codes I tested this set of 2, 572Bs in an Ameritron 811 Amplifier, one at a time. They are all full emission and had the same output (well matched). Many say the... MSRP: Now: $174.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $174.99 Was: Subtotal: Add to Cart