NOS 1984 Mullard Blackburn UK made CV4024 made for the RAF. These tubes are the best NOS production available for replacing ECC81 or 12AT7. With the famous 'copper anode'. Price is for a matched pair of 2 tubes. The Mullard ECC81-CV4024 has the CV4024 markings which were the UK Government designation that indicated this is special quality RAF valve that was specially designed to work in the most difficult operating conditions. This valve was specially designed for long life and be shock resistant up to 500g and with a high temperature rating.
The CV4024 has the famous double ribbed ladder plate anode structure and feature large wide ribbed plates with special copper plate supports that suppress microphonics which makes these valves very low in noise as well as microphonics. They were supplied to NATO forces across the world and therefore used the highest quality components and underwent strict quality controls. They are simply made better; they last longer, have less noise and have conformity to the high specification design parameters. So when you compare this to modern ECC81 and you will understand why we do not stock any of modern made ECC81. When you listen to these you instantly get that classic Mullard sound in audio application.When used to drop the gain in a guitar amplifier or pedal you get that dynamic Mullard tone.. Sonically the valves are warm and clean with excellent top end extension.
This is certainly the best Mullard ECC81 ever made and a great valve to use in guitar amplifier as well as high end audio due to its outstanding performance.
Made in Germany NOS 1970's made for NATO and RAF these big bottle RFT CV4024 aka ECC81 or 12AT7. Matched at 1% with balanced triodes on the Amplitrex AT1000. A serious upgrade on standard stock tubes! Price = for a pair of 2 tubes matched.
NOS Holland made early 60's Heerlen factory rare Philips ADZAM ECC83 tubes. Matched in pairs on the Amplitrex AT1000 in 1% matched pairs! Ultra good sounding tubes on offer here. Measured with Amplitrex 'autobias'.
NOS USA made for US Government 80's longlife high quality Philips ECG 12AT7. Replaces ECC81 and equivalents. legendary tube, 'new old stock'very good sounding tube. Matched for a unopened box of 100 tubes on the Amplitrex AT1000. Make sure to buy this future classical tube now for reasonable prices! Prices are for 1 tube.
NOS German Philips Miniwatt branded Valvo brand tubes from the factory in 'Heerlen' Netherlands. NOS 1960's made special quality longlife 10.000 hours tube. A high quality replacement for 12AT7 or ECC81 tubes. Pair is for a matched pair = 2 tubes. Or for 'hot voiced' ECC83 amplifiers who need to be tamed.
NOS 1960 USA made 5963 SQ equivalent of ECC82, 5814, 12AU7. Long plates type, sound and build is comparabele to Telefunken ECC802S. A must buy for owners of tube amps with ECC82/12AU7. Sold in matched pairs matched on Amplitrex AT1000. Price = for one pair = 2 tubes. Overlooked by the tube buying public but a very good tube, lasting 10.000 hours due to heavy cathode.
Matched RARE Western Electric CK-5755 tubes in pairs. One of the best replacement tubes for a 12AX7, ECC83, 5751. Longlife 10.000 hours. Tested en matched on Amplitrex AT1000. Matching ADAPTERS from 12AX7 ECC83 to 5755 available! Price = for a pair of 2 tubes! This CK-5755 is a double-triode made by Western Electric (USA) for Raytheon. It has same specs as 12AX7A / ECC83 / 7025 but with different pinout for Pin 2+3 and 6-8 (see data sheet). For use as 12AX7 an adaptor or an adjusted socket wiring for pin 2+3 and 6-8 is required. Western Electric marked this tube WE 420A for their own brand. The CK-5755 "features special cathode springs which reduce microphonic response. This characteristic is controlled by a "microphonic stability" test for balance in which the tube is tapped at shock levels of 400 - 600G."
One of my customers bought this tube with an adapter for his 12AX7 based amplifier. He reported back to me: 'best I ever had' even NOS stuff like Mullard is nowhere near the performance of this tube.....
These are NOS new JAN 5670W from GE. Made in USA 3/87. Excellent sturdy longlife tube replaces 6N3, 6N3P, 6N3P-E and 6N3P-DR. Part of the medium MU ECC83 family. Many 1% matched gain and balanced pairs available. Comes with original boxes. Price = for 1 tube.
This is NOS East German NOS 1970's production. Very thick glass enveloppe, quiet, low microphonics. Very good tube. Replaces 12AU7, 5963, 5814WA, 6350, E82CC etc.. Matched in pairs on the Amplitrex AT1000. Price = for 1 tube.
NOS Russian tube 4P1L tube with direct heating & lowest anode voltage. The pentode is fine up to 100 Mc/s. Made by SVETLANA plant. Equivalent to the 4L1S / 4LS1. Copy of RL2 / 4P6 Wehrmacht tubes. Price is for 1 pair = 2 tubes. Used for example in Melody 211. Matched in pairs on the Amplitrex AT1000.
From a box of 200 Reflector 1992 NOS 6N3P equivalent of USA 5670 6N26P, 6N3P-E, 6N3P-DR. Matched at the Amplitrex AT1000 in pairs of 1% matched and balanced triodes. An excellent tube for headphone amplifiers, tube amplifiers or phono stages.
Matched 1% Amplitrex AT1000 pair of 2 tubes RFT 12AX7 aka ECC83. Made in East Germany 1970's for NATO armed forces. Matched at 1,5/1,5 mA vs 1,5/1,5 mA. Matched and balanced triodes. Excellent for headphone amplifiers or phonostages. Price is for one tube.
NOS Russian 6N6P. Made by Reflector. Matched and tested on Amplitrex AT1000. Shurely NOT a pin out equivalent of the ECC99. If you need a ECC99 buy the JJ. More likely the 6N30P tubes. 2000 hours lifespan. Matched 5%. Same pinout as 6DJ8, ECC88, 6922. Big improvement in BAT and Copland amplifiers. Longlife, needs 750 mA glow. Very suitable tube driving a 845 or 300B or 6C33C. Price = for 1 tube.
NOS Dutch Heerlen Philips Miniwatt EF86. Matched on the Amplitrex AT1000. Hard to find in this NOS condition. very good sounding tube. Preferred EF86 longlife mesh type. Price = for 1 tube.
Reissue of the famous scarse and expensive Western Electric 30's tube WE 310A. Used for example in the Line Magnetic 219 integrated amplifier. New production by Line Magnetic and NOS by Svetlana. The best sounding are the Svetlana's. More top and bottom, more glow, better dynamics. price = for 1 tube.
This is the famous 5/80 USA NOS 5755 made by Raytheon. As part of the medium MU ECC83 12AX7 it has a different pinout but can be used in this type of circuits. During the years this tube proved to be of excellent sonics. Can be matched in 1% matched gain and balanced triodes. Also still reasonably priced. Price = for 1 tube.
These are the famous 1976 Voshkod Rocket tubes with their lovely glow. Matched pairs and quads available with 1% matched gain and balanced triodes. Excellent sounding tubes can replace 6922, 6DJ8 or ECC88 or ECC85. Price = for 1 tube.
This sleeve of 5 x 5963 Special Quality GE 5 star tubes can replace all ECC82, 5814A, 12AU7, E88CC, 6350. It's a longlife version 10000 hours. Tubes test all 115-120% of NOS! Excellent rare tube. price = for 1 tube.
Longlife high quality version of the 6N1P. Minimum 5000 hours usability. With OTK mark. Voshkod Rocket factory 05/85. Lovely clean pins. Used by Audio Research, Octave, LAMM. Replaces ECC88, 6DJ8, 6922. Price = for 1 tube. Please be aware the 6N1P-EV uses 600 mA glow instead of 300 mA for a ECC88.
This is one of the best testing tubes I know. Voshkod Rocket 09/91. The test scores on the Amplitrex are on par with the USA NOS top GE 5* series. All more then 100% on gain and GM. Longlife 5000 hours. Excellent for matching on gain and balanced triodes. Can sometimes replace ECC83/12AX7. Not the same pinout however. These a highly underrated tubes, give an excellent warm tube sound. Sounds warmer and less 'hot' compared to classic ECC83 12AX7 tubes. Price = for 1 tube.
RFT ECC81 some with original boxes. East German NOS 70's production. Very silent sturdy tube, heavy glass enveloppe. Underestimated tube. Excellent in pre-amplifiers, phono amplifiers. Equivalent 12AT7, 12AT7WA, 6201. Standard matched as closely as possible in pairs on the Amplitrex AT1000 tube tester. Also available RFT ECC81 CV4024 made in 1970's for NATO. Especially selected by me with double O ring getter support, very quiet and minimal microphonics. Price = for 1 tube.
1970's USA NOS Hewlett Packard 5963 tubes, print is vanishing. Very good SQ replacement of ECC82, 12AU7, 5814, E82CC. Can be matched in pairs on the Amplitrex AT1000. Price = for 1 tube.
These are the Russian equivalent of tubes like 5670, Chinese 6N3, 6N26P, 2C51 or ECC42. Excellent longlife 5000 hours tubes with lovely glow. Measures well on the Amplitrex which says much about their quality. Good matching too. Recommended as recplacement tube for all headphone amplifiers, tube preamplifiers, phono amplifiers etc.. Prodution date 92/02. Reflector factory. Price = for 1 tube.
Reflector 6N3P-E replaces the 5670, 2C51, ECC42 and 6N26P. Good quality Russian tube made 12/80 and 05/85. Nice clean molybdeen pins. Very good sounding tube with 3 mica's! Very stable, excellent microphonics. With boxes but these are badly damaged! Price = for 1 tube.
Longlife 10.000 hours best Russian tube 6N3P-DR sister of 6N3, 6N3P-E, 6N3P-EV, 5670, 2C51, ECC42 and 6N26P. Impressive tube. Excellent sonics, allow for 100 hours break in time. Matched on the Amplitrex AT1000. Scarse and in demand. Excellent upgrade on standard stock tubes. Price = for 1 tube.