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RCA Gray Glass VT-231NOS Pair One of the most desireable 6SN7 types available-- black plates, rich harmonic structure, beautiful timbre and voicing, wide sounds... Pairs Available : 1 Price: $225.00 Sylvania 6SN7GT Tall Bottle This is a great pair of Sylvania tall bottle 6SN7 GT from the 1950's. These are the same construction as the VT-231 but have the n... Pairs Available : 2 Price: $110.00 Tung Sol VT231 Round Plate Pair NOS This is a pair of NOS Tung-Sol roundplate 6SN7 tubes. Smooth, lifelike midrange combined with an incredibly "organic" or natural ... Pairs Available : 0 Price: $425.00 Tung Sol VT231 Round Plate Pairs This is a pair of Tung-Sol roundplate 6SN7 tubes that test excellent on my Hickok 752. Smooth, lifelike midrange combined with an... Pairs Available : 1 Price: $375.00 Displaying 1 to 4 (of 4 products) Result Pages:  1