Riverstone Audio - 6P1P-EB (6П1П-EB) Tested AND Matched Pair (2 tubes) - Vintage Russian Vacuum Tubes - Amplitrex Tested - Replacement for 6P1 / 6P1P Tubes - Platinum Grade Pair - (2 tubes) 6P1P-EB

•Tested AND Matched pair 6P1P-EB (6П1П-EB) Vacuum Tubes. 6P1P-EB vacuum tubes are an excellent replacement for the Chinese 6P1 tubes used in audio circuits including the miniwatt headphone amplifier and other preamplifier circuits that utilize 9-pin 6J1 or 6J1P tubes. During parameter testing at our workshop all tubes are subjected to multiple test cycles and are matched within 5% for plate current (ip) and mutual conductance (Gm). All matched tube sets are auditioned in an amplifier to determine sound quality. Fewer than 50% of the NOS 6P1P-EB tubes we test meet our high standards for audio use and are selected for our Platinum Grade pairs. You will not find a more rigorously tested pair of vacuum tubes anywhere. PLEASE NOTE: 6P1P-EB tubes can only be used as a direct replacement for Chinese 6P1 and Russian 6P1P. 6P1P-EB tubes should not be used to replace other types of 9-pin vacuum tubes - AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE - PLEASE...carefully determine the type of tube (printed on the tube) that is used in your amplifier. TUBE WARRANTY: we have confidence in our products and guarantee that these tubes will test at NOS levels when received AND we back these tubes with a no-nonsense ONE YEAR money-back warranty - THE BEST WARRANTY in the audio tube business. To protect the tubes during shipping and storage, 6P1P-EB tubes are supplied in Riverstone Audio's custom "tube cradle" boxes. All vacuum tubes sold by Riverstone Audio will have the "Riverstone Audio" name, logo and QC label on the tube box. • ONE PAIR (2 tubes) 6P1P-EB (6П1П-EB) NOS Vacuum Tubes. The 6P1P-EB vacuum tube is a vintage Soviet-made miniature 9-pin beam-tetrode that was manufactured by Svetlana. The “-EB” designation at the end of the 6P1P tube code designates a long-life (E) and high-reliability (B) version of the 6P1P tube. • UPGRADE FOR CHINESE 6P1 VACUUM TUBES – 6P1P-EB vacuum tubes are an excellent upgrade for Chinese 6P1 tubes. Please Note: 6P1P-EB tubes can only be used as a direct replacement for Chinese 6P1 and Russian 6P1P tubes. 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 tube testers to evaluate the electrical parameters of the tubes. Tubes are evaluated for plate current (ip), mutual conductance, tube gain, leakage and noise. After matching, the tubes are evaluated for sound quality in an amplifier. If any deficiencies are found the tubes are not sold. Less than 50% of the 6P1P-EB-E tubes we test and audition pass our standard for high fidelity audio use and are used in our Platinum Grade sets. • TEST RESULTS CLEARLY MARKED on the tube boxes with data for ip and Gm attached to the individual tube boxes. The tubes chosen for these matched pairs have close electrical parameter matching (ip and Gm are within 5% tubes). Individual matched pairs will have identical date codes. • BUY WITH CONFIDENCE - Our Platinum Grade 6P1P-EB vacuum tubes are backed by Riverstone Audio’s no-nonsense 1-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-EB tubes are supplied in Riverstone Audio’s custom “Tube Cradle” boxes.

MATCHED PAIR 6P1P-EB NOS Vacuum Tubes - UPGRADE FOR CHINESE 6P1 VACUUM TUBES. The 6P1P-EB vacuum tube is a vintage miniature 9-pin beam-tetrode. The -EB designation at the end of the 6P1P tube designates a long-life (E) and high-reliability (B) version of the 6P1P tube. IMPORTANT: These tubes ARE NOT a replacment for 6N6, 6N6P or 6N1P tubes.,*****PLEASE NOTE: 6P1P-EB (cryillic 6 1 -EB) tubes are "beam tetrodes" and CAN NOT be used as a replacement for dual triode tubes such as 6N1P (6H1 ) , 6N1P-EB (6H1 -EV) 6N6 or 6N6P (6H6 ) tubes. *****AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE. 6P1P-EB tubes can only be used as a direct replacement for 9-PIN Chinese 6P1 tubes. Carefully determine the type of tube used in your amplifier before ordering.,TESTED AND MATCHED by experienced engineers using Amplitrex tube testers to evaluate the electrical parameters of the tubes. Tubes are evaluated for plate current (ip), mutual conductance, tube gain, leakage and noise. After matching, the tubes are evaluated for sound quality in an amplifier. If any deficiencies are found the tubes are not sold. Less than 50% of the 6P1P-EB-tubes we test and audition pass our standard for high fidelity audio use and are used in our 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 are within 5% tubes). Individual matched pairs will have identical date s.,BUY WITH CONFIDENCE - Our Platinum Grade 6P1P-EB vacuum tubes are backed by Riverstone Audio s no-nonsense 3-year - THE BEST AVAILABLE in the audio tube business. We also that the tubes selected for our Platinum Grade matched pairs test will test at NOS levels when received. To protect the tubes during and storage, the 6P1P-EB tubes are supplied in Riverstone Audio s custom Tube Cradle boxes.