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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 : 1 Price: $110.00 Sylvania VT-231 Excellent Pairs Available are pairs of Sylvania tall bottle VT-231s. These are in excellent condition and test excellent as well. Priced per pair.... Pairs Available : 5 Price: $165.00 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: $395.00 Displaying 1 to 3 (of 3 products) Result Pages:  1