809 reviews analysed
Rank
Product Name
Score
1. Riverstone Audio – Tested/Matched Pair (2 Tubes) 7-Pin GE JAN 5654W Fully-Tested Vacuum Tubes – Upgrade for 6AK5 / 6J1 / 6J1P / EF95 – GE 5654W Platinum Grade Pair
Feature
- **IMPORTANT** AMPLIFIER DAMAGE CAN OCCUR IF YOU SUBSTITUTE THE WRONG TYPE OF TUBE. 5654W tubes should only be used to replace 7-Pin 6J1, 6J1P / 6J1P-EB / 6Zh1P-EV, 6AK5, 6AK5W and EF95 tubes. DO NOT SUBSTITUTE FOR ANY OTHER TYPE OF 7-pin tube.
- TESTED and MATCHED Pair (2 tubes) of low-noise 7-Pin NIB/NOS GE JAN 5654W Vacuum Tubes. Considered one of the best of the 5654 / 6AK5 / EF95 family of tubes for audio use. These vintage US manufactured GE tubes are Mil. Spec. (JAN) Electron Tubes – Higher Durability and Life. These NOS tubes were obtained from factory-sealed military surplus boxes. ***NOTE: All vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes***
- BUY WITH CONFIDENCE – All vacuum tubes sold by Riverstone Audio are backed by our no-nonsense 2-YEAR warranty. THE BEST WARRANTY AVAILABLE in the audio tube business. We have been testing and using vacuum tubes for many years and know what it takes to select tubes for low-noise audio applications.
- RIVERSTONE AUDIO utilizes the best available equipment (Amplitrex AT1000) to test and match audio tubes. We do not sell untested tubes – never have and never will. Only the best NOS tubes are selected for Riverstone’s Platinum tested/matched pairs.
- TEST RESULTS are clearly listed on each tube box. Our experienced engineers match vacuum tubes for BOTH plate current and mutual conductance. All tubes we sell must also pass a specialized life test and an audio sound test. We guarantee that the GE 5654W tubes selected for these matched pairs test at NOS levels at or above 4800 micro-mho and a plate current of 7.2 mA or higher. ***Vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes***
2. Riverstone Audio – Vacuum Tube Pin Straightener For 9-Pin B9A-base (12AX7 / EL84 / 5670) and 7-Pin B7G-base (5654 / 6AU6 / 6AQ5A) Tubes – Hardened Stainless – Hand Held – Straightens Vacuum Tube Pins
Feature
- A pocket size pin-straightener used to realign and straighten bent/misaligned vacuum tube pins. Can be used for US/European and modern issue Russian/Chinese miniature 9-pin and 7-pin vacuum tubes with US-European 9-pin B9A and 7-pin B7G bases. Tubes with B9A bases include 12AX7, 12AU7, 5670 and EL84. Tubes with B7G bases include 6AK5, 5654, EF95, 6AQ5A and 6AU6.
- Great accessory for professional musicians, audiophiles and repair shops working with tube-based amplifiers.
- This one is the real deal
- precision CNC machined from a premium grade stainless steel (SUS 420) and hardened to Rockwell C50 for long life. Pin straighteners manufactured from softer materials, such as aluminum, can cause pin contamination (tube pins can also quickly wear straighteners made from softer materials).
- Straight/aligned tube pins will reduce tube socket damage during tube installation and also reduce the likelihood of tube damage (forcing bent pins into a socket significantly increases the stress at the pin/glass interface of a tube, which can lead to tube damage and premature tube failure). Dimensions of pin straightener: 36 mm length x 22 mm diameter. Supplied with a pocket size, foam-lined tin storage box (82 mm x 40 mm x 20 mm).
- ***Please note*** Do not use for severely bent pins – tube damage and glass breakage can occur. Not recommended for use with gold coated pins (coatings can be scraped/damaged by the pin straightener). Compatible with vintage US/EU and modern issue Russian and Chinese tubes having B7G and B9A bases, may not be suitable for a few of the very early vintage Chinese tubes, which sometimes have variation in pin tolerances. Laser engraved logo/print on the surface.
3. Riverstone Audio – 6P1P-EB Tested AND Matched Pair (2 tubes) – Vintage Russian Vacuum Tubes – Amplitrex Tested – Replacement for 9-PIN 6P1 / 6P1P Tubes – Platinum Grade Pair – (2 tubes) 6P1P-EB
Feature
- MATCHED PAIR 6P1P-EB NOS Vacuum Tubes. – UPGRADE FOR CHINESE 6P1 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. *****The tubes are marked (see photos) in Russian cyrillic 6П1П-EB (in English – 6P1P-EB). THESE ARE NOT 6N1P dual-triode tubes*****
- **IMPORTANT** 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 and Russian 6P1P 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 codes.
- BUY WITH CONFIDENCE – Our Platinum Grade 6P1P-EB vacuum tubes are backed by Riverstone Audio’s 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-EB tubes are supplied in Riverstone Audio’s custom “Tube Cradle” boxes.
Description
Tested AND Matched pair 6P1P-EB (in Russian cyrillic 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 6P1 or 6P1P 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. We back these tubes with a no-nonsense TWO 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. PLEASE NOTE: 6P1P-EB tubes are beam-tetrode tubes and are marked in Russian cyrillic as 6П1П-EB (see listing photos). THESE ARE NOT 6N1P tubes (a dual-triode tube).
4. Riverstone Audio, 6N3P-E Matched Pair (2 tubes) – Vintage NOS Russian Vacuum Tubes Replacement for 6N3 / 6N3P / 5670 / 5670W / 396A / 2C51 – Amplitrex Tested/Matched – Platinum Grade Pair (6N3P-E)
Feature
- ONE PAIR (2 pcs) – 6N3P-E NOS Vacuum Tubes. The 6N3P-E is a vintage Russian dual-triode 9-pin vacuum tube that was manufactured at the Relector plant in Saratov. This is the long-life (denoted by the “E” suffix) version of the 6N3P tube with 3 mica spacers and are considered an exceptional-quality audio tube.
- UPGRADE FOR 6N3 TUBES – 6N3P-E tubes are an upgrade/replacement for Chinese 6N3 and Russian 6N3P tubes and are generally suitable as a substitute for US/European 5670 / 5670W / 396A / 2C51 tubes (this should be verified by the amp manufacturer). IMPORTANT: 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).
- 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, H-K 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 35% of the 6N3P-E tubes we test pass our standard for high fidelity audio use and are selected for these Platinum Grade Pairs.
- TEST RESULTS CLEARLY MARKED on the tube boxes with data labels for ip, Gm and tube gain are attached to the individual tube boxes. Tubes chosen for these special matched pairs have good balance between tube sections and close electrical parameter matching between the tubes (ip and Gm are within 10% and tubes are matched for gain within 5%). Individual matched pairs will have identical date codes (date codes for the tubes we offer range from 1974 to 1992).
- BUY WITH CONFIDENCE – Our Platinum Grade 6N3P-E vacuum tubes are backed by a no-nonsense 1-year warranty. THE BEST WARRANTY AVAILABLE in the audio tube business. We guarantee that the tubes selected for our matched pairs test at NOS levels. Tubes are supplied in our custom tube boxes (Riverstone Audio’s “Tube Cradle” boxes). Vacuum tubes sold by Riverstone Audio will have the “Riverstone Audio” name, logo and QC label on the boxes.
5. Tung-Sol 12AX7 Preamp Vacuum Tube, Single
6. Tube Amp Doctor EL84 STR Premium Selected Vacuum Tube, Matched Pair
7. Neoteck Bluetooth 4.2 Stereo Audio Amplifier Receiver with 6J4 Vacuum Tubes Certified aptX Low Latency, 2 Channel Mini Hi-Fi Class D Integrated Amp for Home Passive Speakers 50W + 50W
Feature
- Home Hi-Fi integrated amplifier, 50W RMSx2 (4 ohms, 20 Hz – 20 kHz, 0.04% THD), Adopt Texas Instruments TPA3116D2 chip, exclusively designed for the customers who pursue HiFi sound
- Bluetooth Receiver, range: about 40 ft– Adopt CSR64215 Bluetooth 4.2 core Supports the aptX Low Latency codec to virtually eliminate audio-visual lag making an ideal choice for watching TV/ movies. For best results, use with aptX Low Latency supporting speakers
- Adopt 2pcs 6J4 tubes, It could make sound soft, thick, sweet and transparent, tubes can be replaced by 6K4, 6J1, GE5654, 6AK5, 6ж1П, 6BC5, 403A/B, EF40, EF95 and so on
- Advanced circuitry design, built-in speakers protection circuit, solid aluminum chassis for long time use, small size, good looks, simple functionality, and excellent sound quality
- 【Power amp + Headphone amp】 Power amplifier is easy to connect to your audio system with no software to install or settings to change. Headphone amp supports most headphones of high impedance 16-300Ω, Perfectly suited for your High impedance headphone
8. Yibuy 2.7×2.27cm Black Bakelite 9-pin Tube Socket 12AX7 Audio Tube Amplifier Vacuum Tube Base Pack of 4
9. Little Dot I+ 6JI X2 Tube Standard Hybrid Headphone Headphone Amp Pre-Amp Tube Amplifier (LDI+)
10. RARE CRT vintage oscilloscope cathode ray tube 6LO1I NOS
Description
Maximum values : Heater voltage — 5,7 … 6,9V . 2nd anode voltage — 500 … 800V . Max 1st anode voltage — 150V . Control grid voltage — -125 … 0V . Heater-cathode voltage — -125 … 0V . Impedance in control grid circuit, no more than — 1,5MΩ. Impedance in any defl ection plate circuit at 50Hz, no more than — 2MΩ. Voltage between any deflection plates and 2nd anode — -450 … 450V .
Conclusion
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