Riverstone Audio, 6N3P-E (6Н3П-Е) Tested and Matched Pair

Riverstone Audio, 6N3P-E (6Н3П-Е) Tested and Matched Pair (2 tubes) - Vintage NOS Vacuum Tubes Upgrade for 9-pin 6N3 / 6N3P / 5670 / 5670W / 396A / 2C51 - Platinum Grade Pair 6N3P-E (6Н3П-Е)
- Matched pair NOS 6N3P-E (cyrillic 6Н3П-Е) Vacuum Tubes. 6N3P-E tubes are an upgrade/replacement for 6N3 and 6N3P (6Н3П) tubes and also for 5670 / 5670W / 396A / 2C51 tubes. IMPORTANT: Amplifer damage can occur if the wrong type of tube is used. Before ordering please verify the type of tube used in your amplifier.
- 6N3P-E is a VINTAGE Russian dual-triode 9-pin vacuum tube that was manufactured by the original Reflektor plant in Russia. This long-life tube (denoted by the "E" suffix) has 3 mica-spacers and is considered an exceptional audio tube.
- Tested and Matched using Amplitrex AT1000 tube testers to evaluate the electrical parameters of the tubes.
- Data labels for Gm (mutual condutance), Vg (grid voltage) and tube gain (µ) are attached to the tube boxes (tested using auto-bias mode). The tubes chosen for these special matched-pairs have very good balance between tube sections and close electrical parameter matching between the tubes. Tubes are matched within 6% for Gm, Vg and tube gain. Individual matched pairs will have identical manufacture date-codes.
- 3-year warranty. All Platinum Grade vacuum tubes are backed by our no-nonsense three-year warranty. We also guarantee that the tubes selected for our matched pairs test at NOS levels. For protection during shipment, we use tube boxes designed by Riverstone Audio (our “Tube Cradle” boxes). Vacuum tubes sold by Riverstone Audio will have the "Riverstone Audio" name, logo and QC label on the boxes.
- 6N3P-E (cyrillic 6Н3П-Е) vacuum tubes can be identified by their three mica-spacers; two coated mica-spacers that contact the tube shell and a 3rd mica-spacer located directly below the getter-holder. The tubes will also have the printed Reflector logo and cyrillic marking 6Н3П-Е. For comparison, Russian 6N3P (6Н3П) and 6N3P-EV (6Н3П-ЕB) tubes and the Chinese 6N3 tube, will not have a 3rd mica spacer (6N3 tubes can be further identified by a rectangular getter-holder).
Our Platinum Grade vacuum tubes are the most thoroughly tested 6N3P-E tubes available. To determine stability, tubes are subjected to multiple test cycles and are matched within 6% for mutual conductance (Gm) and within 5% for tube gain (final testing of these tubes is performed under auto-bias at a fixed plate current ip = 8.8 mA). All matched tubes are auditioned in an amplifier to determine sound quality. FEWER THAN 35% of the 6N3P-E tubes we test meet our high standards for audio use and are chosen for Platinum Grade pairs - we select tubes that show stability during multiple test cycles and exhibit low noise and excellent audio sound during final testing in an audio amplifier. You will not find a more rigorously tested pair of vacuum tubes anywhere. The 6N3P-E tube is the high reliability version ("E" suffix in the tube code) and is a great upgrade for Chinese 6N3 tubes. ***Please Note: We carefully inspect all tubes we use and to the best of our knowledge the 6N3P-E tubes we use in our Platinum Grade sets are NOS tubes. We also guarantee that the tubes will test at NOS levels when received.*** To protect the tubes during shipping and storage, the tubes are supplied in Riverstone Audio's custom "tube cradle" boxes. As a US seller we have confidence in the quality of what we sell. We back these vintage vacuum tubes with a no-nonsense one-year money-back warranty - the best warranty in the audio tube business. 6N3P-E tubes can only be used as a replacement for Chinese 6N3, Russian 6N3P and are generally suitable as a substitute for US/European 5670 / 5670W / 396A / 2C51 tubes (this should be first verified by the amp manufacturer). PLEASE NOTE: AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE - Before ordering CAREFULLY determine the type of tube used in your amplifier (tube type is printed on a tube).
Country USA
Brand Riverstone Audio
Manufacturer Reflector Plant, Saratov
ItemPartNumber 6N3P-E (6Н3П-Е) Vacuum Tubes
Warranty 2-Year Riverstone Audio
Color 6N3P-E (6Н3П-Е)
Size Small
ReleaseDate 0000-00-00

Country	USA
Brand	Riverstone Audio
Manufacturer	Reflector Plant, Saratov
ItemPartNumber	6N3P-E (6Н3П-Е) Vacuum Tubes
Warranty	2-Year Riverstone Audio
Color	6N3P-E (6Н3П-Е)
Size	Small
ReleaseDate	0000-00-00

Riverstone Audio, 6N3P-E (6Н3П-Е) Tested and Matched Pair (2 tubes) - Vintage NOS Vacuum Tubes Upgrade for 9-pin 6N3 / 6N3P / 5670 / 5670W / 396A / 2C51 - Platinum Grade Pair 6N3P-E (6Н3П-Е)

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