All tubes are tested for Gm, shorts, leaks, gas, and noise on one of our vintage, calibrated, or state of the art digital tube testers. To view our inventory of thousands of tubes both NOS & New Production. We are an authorized dealer for New Sensor products including Sovtek, Electro-Harmonix, Mullard, Tung-Sol, and Genalex. We sell A grade quality stock, not factory seconds like many other sellers. Brand New Current Matched Quad (4) Electro-Harmonix 6550 Ceramic Vacuum Tubes. The 6550EH is the finest current production tube for any amp using 6550 or KT88. The 6550EH offers the maximum power of any 6550 with the linearity guitar and bass players want. With 42 watts of plate dissipation in tetrode operation and 44 watts in triode, the 6550EH offers an improvement in power over even the most desirable vintage types including the Tung-Sol 6550 and Genelex KT88. This extra headroom in a 6550EH equipped amp means bass players can finally realize the full dynamic range of the instrument and the sweetest tone available. The extra ruggedness of the 6550EH was engineered with the punishing abuse of guitar amps in mind. The nickel steel side rod mica supports ensure that the 6550EH will hold up in even the most punishing environment of high powered bass amps like the Ampeg SVT and combos where the tube is only inches from the speaker and still deliver the sweetest tone of any 6550 or KT88. The 6550EH will greatly improve the performance of any amp. Precision Testing & Matching. Test Data on the Box. Checked for shorts, gas and leaks. Tested for and/or matched by Plate Current (Ip) and General Mutual Transconductance (Gm) at real world voltages on a Maxi-Matcher tube tester. Preamp Tubes: Checked for shorts, gas and leaks. Tested for and/or matched by Gain and. General Mutual Transconductance (Gm) at real world voltages on a Maxi-Matcher Preamp II tube tester. Tested for and/or matched by Emissions on a calibrated Hickok TV-7 or Triplett 3444 tube tester. We have a retail location located in Easthampton MA. Other options available only by request. 3-9 Days, includes tracking. 1-3 Days, includes tracking. Typically 3-6 weeks but up to. 6-14 Days – Includes Tracking. All of our products are guaranteed unless otherwise stated. All items all guaranteed to be as described and free of any electrical or operational faults such as shorts, low test, microphonics, noise etc. For example-a tube installed in the wrong amplifier. New Production tubes are guaranteed for 90 days. Come visit the only retail tube store in the USA! VIVA TUBES is your source for vintage vacuum tubes. Located in an appropriately rustic mill building in Easthampton MA. We share our building with a Recording Studio, Brewery, Practice Spaces and many other small businesses. We carry everything from vintage audio tubes and new productions to HAM tubes. We also have a variety of vintage electronic parts as well as audio equipment and more! We have a vast inventory of thousands and thousands of tubes. What started as a hobby several years ago to fund my obsession with tube audio, VIVA TUBES has quickly grown into a full time. We pride ourselves on our excellent customer service and great attention to testing and product detail. Shop with us and find out why the majority of our customers are repeat customers. APPOINTMENT TO VIEW LOCALLY – PLEASE CONTACT. The item “Brand New Current Matched Quad (4) Electro-Harmonix 6550 Ceramic Vacuum Tubes” is in sale since Thursday, November 9, 2017. This item is in the category “Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Parts & Accessories\Vintage Tubes & Tube Sockets”. The seller is “vivatubescom” and is located in Easthampton, Massachusetts. This item can be shipped worldwide.
- Type: Vacuum Tube
- Brand: Electro-Harmonix
- Model: 6550EH
- Country/Region of Manufacture: Russian Federation
- MPN: 6550EH