16 SED (SVETLANA) 6550 "WINGED C" TUBES, NO BOXES.Tubes are used and hold bias well. Used in audiophile mono block amps (my amps take 16 - 6550/KT88 tubes) These ARE the genuine (no longer made) SED 6550C tubes form SED. These are NOT the reissue New Sensor tubes. Switched to KT88 for something different. Tubes retail new for $54 each. 16 - 6550 tubes for $160 cash. Must buy all 16 for $160, will not separate. Price is Firm and Very Fair. Call: (425) 562 - 8199 LOCAL PICKUP IN BELLEVUE WA ONLY This is the highly regarded SED 6550C / SV6550C. These current production tubes are constructed with a gold-plated molybdenum alloy grid and carbon-coated screen grid. All ratings of the SED SV6550C meet or exceed those of the original version; top-quality cathode materials and extensive aging yield outstanding performance in high-fidelity and musical-instrument amplifiers. The SED SV6550C is made exclusively at the SED SPb factory in St. Petersburg and they bear the "Winged C" logo. This is the factory that made the famous Svetlana tubes before the New Sensor folks grabbed that name and started using it on other tubes not made by the original Svetlana factory in St. Petersburg. If you want the authentic Svetlana tubes, look for the "Winged C" logo.
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