6P1P-EV (6П1П-ЕВ) NOS Tested-Matched Pair - Upgrade for 9-pin 6P1 and 6P1P (6П1П) Vacuum Tubes - Amplitrex Tested - Platinum Grade Pair - 6P1P-EV (6П1П-ЕВ)
Product Details

• Item Weight: 6.4 ounces
• Package Dimensions: 4.9 x 3.3 x 2.2 inches
• Item model number: 6P1P-EV (6П1П-ЕВ) - ONE PAIR
• Date First Available: January 16, 2019

• *****PLEASE NOTE: 6P1P-EV (61-EB) tubes are "beam tetrodes" and CAN NOT be used as a replacement for other tubes such as 6N6, 6N6P (6H6), 6N1P (6H1), 6N1P-EB (6H1-EV), ***** AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE - carefully determine the type of tube used in your amplifier before ordering.
• TESTED AND MATCHED by experienced engineers using Amplitrex testers to evaluate the electrical parameters of the tubes. The tubes are evaluated for plate current (ip), mutual conductance, heater/cathode leakage, gas and noise. If any deficiencies are found the tubes are not sold. Less than 50% of the 6P1P-EV tubes we test and audition pass our standard for audio use and are used in these Platinum Grade sets.
• TEST RESULTS CLEARLY MARKED on the tube boxes with data for both ip and Gm attached to the individual tube boxes. The tubes chosen for these matched pairs have close electrical parameter matching (ip and Gm variation between tubes is guaranteed to be within 5%). Individual matched pairs will have identical manufacture date codes.
• BUY WITH CONFIDENCE - Our Platinum Grade 6P1P-EV vacuum tubes are backed by Riverstone Audios no-nonsense 2-year warranty - THE BEST WARRANTY AVAILABLE in the audio tube business. We also guarantee that the tubes selected for our Platinum Grade matched pairs test will test at NOS levels when received. To protect the tubes during shipping and storage, the 6P1P-EV tubes are supplied in Riverstone Audios custom Tube Cradle boxes.

Tested AND Matched pair of NOS 6P1P-EV vacuum tubes. PLEASE NOTE: the tubesare factory marked in Russian cyrillic as 6П1П-EB, which translates to6P1P-EV. 6P1P-EV is a 9-pin "beam tetrode" tube. These tubes are NOT asubstitute for ANY "dual triode" tubes. Please do not confuse the 6P1P-EV tubewith tubes such as the Chinese manufactured 6N6 tube or Russian manufactured6N6P (6H6П) or 6N1P (6H1П) tubes. These vintage NOS vacuum tubes are anexcellent replacement for the Chinese 9-pin 6P1 or Russian 6P1P tubes. Alltubes are subjected to multiple test cycles during eletrical-parameter testingat our workshop. The tubes are matched within 5% for BOTH plate current (ip)and transconductance (Gm). FEWER THAN 50% of the NOS 6P1P-EV tubes we testmeet our standards for audio use and are selected for these Platinum Gradepairs. You will not find a more rigorously tested pair of 6P1P-EV vacuumtubes. AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE.Carefully determine the type of tube that is used in your amplifier. TUBEWARRANTY - we have confidence in our products and guarantee that these tubeswill test at NOS levels when received with ip and Gm between the tubes matchedto within 5%. We back the tubes with a no-nonsense TWO YEAR money-backwarranty. To protect the tubes during shipping and storage, the tubes aresupplied in Riverstone Audio's custom "tube cradle" boxes. All vacuum tubessold by Riverstone Audio will have the "Riverstone Audio" name, logo and QClabel on the tube box. AGAIN, PLEASE NOTE: 6P1P-EV (6П1П-EB) is a "beamtetrode" tube - this tube IS NOT A SUBSTITUTE for any other type of 9-pinvacuum tube.