Lotto di 8 vlvole 6550C Svetlana Alati =C Valvole NOS- Winged C. Valvole in dotazione ricevute con finale Audioresearch serie reference, sostituite dopo poche ore di funzionamento con generl electric, tenute come rierva.Sono abbinate ed efficenti.

SVETLANARare Matched Pair 6550C Winged C Valves TubesIndividually Tested & MatchedValve 1) Ia 84 - Gm 8.4Valve 2) Ia 85 - Gm 8.4Supplied in White BoxesMade in St Petersburg, RussiaUnused, New Old Stock As Per Photo PayPal Payment Only Please

SVETLANARare Matched Quad 6550C Winged C Valves TubesIndividually Tested & MatchedValve 1) Ia 89 - Gm 8.5Valve 2) Ia 89 - Gm 8.7Valve 3) Ia 89 - Gm 8.5Valve 4) Ia 87 - Gm 8.7Supplied in White BoxesMade in St Petersburg, RussiaUnused, New Old Stock

Matched Pair Svetlana 6550C Winged C Valves/Vacuum Tubes - AVO Tested Strong. Extremely low hours, still test as NOS. These are the ones you want, best recent production 6550/KT88s from the St. Pete factory with the rectangular cut outs in the anodes. Ideal for hifi or guitar. Save on new. Perfectly matched. Tested on a recently calibrated AVO VCM 160 with the following results; IA GMValve 1: A1 92.2 8.9 Valve 2: A1 92.5 8.8 AVO NOS Specs: IA = 87.0 GM = 9.0 No leaks or shorts, solid bases, shiny pins. eBay seller for over 20 years, buy with confidence - see feedback. Valves will be shipped next day, carefully packaged, tracked and insured. Please drop a note with any questions. Shipping happily combined on multiple items. For overseas purchases, please message for a shipping quote before purchasing. Dont use your amp as a circuit breaker, buy tested valves!

Matched Pair Svetlana 6550C Winged C Valves/Vacuum Tubes - AVO Tested Strong. Extremely low hours, still test as NOS. These are the ones you want, best recent production 6550/KT88s from the St. Pete factory with the rectangular cut outs in the anodes. Ideal for hifi or guitar. Save on new. Perfectly matched. Tested on a recently calibrated AVO VCM 160 with the following results; IA GMValve 1: A1 92.2 8.9 Valve 2: A1 92.5 8.8 AVO NOS Specs: IA = 87.0 GM = 9.0 No leaks or shorts, solid bases, shiny pins. eBay seller for over 20 years, buy with confidence - see feedback. Valves will be shipped next day, carefully packaged, tracked and insured. Please drop a note with any questions. Shipping happily combined on multiple items. For overseas purchases, please message for a shipping quote before purchasing. Dont use your amp as a circuit breaker, buy tested valves!

6550 Svetlana SEC Match Tested Pair. Up for sale is a rare pair of vintage matched Svetlana “Winged C” logo 6550’s. This is the best Russian production 6550 ever made. Fully Amplitrex tested strong in fixed bias mode @ 500V, see images for results. These saw light use in an Audio Research Power Supply. Tubes will ship in generic white tube boxes via USPS PRIORITY MAIL. Due to the nature of vintage/used vacuum tubes, these are being sold AS-IS with no returns accepted. I will guarantee them to NOT be DOA and to match test results on any Amplitrex AT1000 using the same settings and test parameters. Please ask any and all questions before purchase, thanks for looking!

Match Tested Pair of 6550C Svetlana SEC Winged C Audio Receiver Power Vacuum Tubes Country of origin: Russia Model: Svetlana SEC winged C Manufacturer: Svetlana SEC Type: Power Plates: gray vented with copper rods and radiators Spacers: two with alignment tabs Getter frames: dual solid saucers Getter flash: top Glass: clear Base type: Octal 8 pin with a metal base collar Construction: same configuration Condition: excellent Usage estimate: minimal Cartons: NA Quantity: 2 Please review the photos for more detail Excellent strong balanced NOS test results for Gm / bias: Gm: 6.8 with bias ~50.0 mA Gm: 6.4 with bias ~47.5 mA For Gm, 3.9 is the suggested minimum value No shorts detected For reference we use a calibrated Triplett 3444A Tester Compatibility: Suitable for audio preamplification and vintage tube-based equipment ideal for use in tube pre-amplifiers and audio recording equipment The tubes will be carefully packed to ensure safe shipping Estimated delivery time within the USA is 3 to 7 business days Standard shipping service is US Postal 1st class Shipping is combined when applicable Please feel free to contact us if you require any additional information