Brand New Svetlana 6550 / 6550C Vacuum Tubes - Matched Quad

We only sell factory fresh tubes and NOT seconds as we are an authorized dealer for New Sensor (EHX) and JJ

There is a lot of confusion when it comes to the legendary Svetlana 6550 tube and we want to clear it up. These are technically reissues though they are built in Russia using the same equipment as the originals. In the early 2000's New Sensor bought Svetlana and they are made in the Saratov plant now rather than the original Saint Petersburg plant. Other than where they were made, they are no different than the original 1990's SED or Winged =C= 6550 tubes. These are some of the finest new production 6550s money can buy. They're known for their robust quality and classic American 6550 tone.

Testing and/or Matching

We test and/or match our tubes by Gm & Plate Current using a state of the art digital Maxi-Matcher tube tester. The Maxi-Matcher simulates a real circuit and tests tubes in real-world conditions. We also check our tubes for other issues like shorts on calibrated and vintage tube testers. We match our tubes +/- 5% with an overall tolerance of 10%.

While we do screen for noise and microphonics, even the best tube testers are quite bad at finding these faults. The only real test is with your ears. We guarantee that our tubes will be free of noise or microphonics but please be aware that there isn't a whole lot we can do to ensure your tube won't be. To combat this issue, we are quite liberal in accepting returns for these reasons.

Shipping

** INTERNATIONAL shipments typically take 3-6 weeks by our standard USPS First Class Mail but often take up to 3 months for delivery. eBay estimates are NEVER correct for International **

All orders are processed & shipped within 1 business day

Since all of our items ship for free, we cannot combine shipments and will not refund you retroactively

Domestic Orders

USPS First Class Mail: 2-7 business days, tracking

USPS Priority Mail: 1-3 Business Days, tracking

International Orders

USPS First Class Mail International: 3-6 weeks typically but up to 3 MONTHS, limited to no tracking

USPS Priority Mail International: 1-2 weeks, full tracking

Guarantee & Returns

We guarantee our tubes for 90 days upon receipt. If anything goes wrong in that time, we will replace tube once returned to us. We also pay the return shipping or will send you a prepaid shipping label so you will not be out anything. We accept returns if a tube arrives faulty or becomes faulty within the warranty period. Noise and/or microphonic issues are covered. We reserve the right to deny returns for buyer's remorse including the buyer's opinion on "tone".