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) 7591A Electro-Harmonix Vacuum Tubes. Tired of saying “fuggettaboudit, ” “can’t get’em, ” UNOBTANIUM! Well, now we got’em. And they’re for real! Smooth, yet punchy, with a sweet harmonix finish, this year’s vintage from New Sensor. 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) 7591A Electro-Harmonix 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: 7591A
- Country/Region of Manufacture: Russian Federation
- MPN: 7591A