What is an ECC81 tube used for?
The JJ ECC81 / 12AT7 tube is a low noise and low microphonic preamp tube. A good choice for phase inverters and reverb circuits calling for 12AT7 tubes. The ECC81 tube type is equivalent to the North American 12AT7 tube and can be used in any 12AT7 or ECC81 circuit. Other JJ Electronics tubes 12AT7 Tube Types
Is the ECC81 a good phase splitter?
The ECC81 also makes an excellent phase splitter in modern audio applications. This exhibit looks to be new and carries the later Mullard logo that appeared during 1970. The twin triode sections have no central electrostatic screen as would be seen in RF valves.
What is Mullard ECC81 used for?
The Mullard ECC81 was designed for RF use and is of medium impedance. It was used as a frequency changer in five station television sets. In this application the oscillator triode would be the first to cease working.
Are ECC81 and 12AT7 the same?
ECC81: This is the European version of the 12AT7, and is identical to it.
Are 12AX7 and 12AT7 interchangeable?
The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. In many cases, these tubes are interchangeable and can easily be swapped.
What type of tube is a 12AT7?
dual-triode vacuum tube12AT7 (also known in Europe by the Mullard–Philips tube designation of ECC81) is a miniature 9-pin medium-gain (60) dual-triode vacuum tube popular in guitar amplifiers.
Are 12AU7 and 12AX7 interchangeable?
Are 12AX7 and 12AU7 Interchangeable? Important: Always check your amps circuit/manual before swapping out a component to avoid damaging your amp. Technically, yes, you can physically interchange a 12AX7 tube for a 12AU7 tube in your amp without risk of major damage to your amp.
Which 12AX7 sounds best?
The best current production 12AX7 tubes for metal are: JJ ECC83S: If you like a darker rhythm sound, this tube can be great for that. They are more warm than bright and pretty aggressive. JJ ECC803S: This version that JJ has released is a more balanced sound.
Do preamp tubes affect tone?
More to the point here, though, is the fact that the gain of the first preamp tube—often referred to as a “gain stage”—very directly impacts the tone that you achieve from the amp as a whole.
Can I replace 12AU7 with 12AT7?
The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. In many cases, these tubes are interchangeable and can easily be swapped.
Are ECC83 and 12AX7 the same?
The ECC83 Valve – also known as the 12AX7. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. It has two identical triodes both of which have a high voltage gain. It is used in 99% of all guitar amplifiers.
What tubes are interchangeable with 12AX7?
Knowledge is power, and knowing an unusual substitute may be a true joy.Small Signal Tubes:12AX7. Substitutes: ECC83, 12AX7A, 12AX7WA, 7025, 5761,6057,6681,7494,7729, 7025#, ECC83#, 6L13, 12DF7, 12DT7, 5751, 7025A, B339, B759, CV4004, E83CC, ECC803, M8137. … 12AU7. … 12AT7. … 6DJ8. … Rectifier Tube:5AR4. … Other Dual Triode Tubes:More items…
Do 12AX7 tubes need to be matched?
Preamp tubes are devices used in amplifiers to shape the tonal characteristics of a guitar’s sound….Why Preamp Tubes Don’t Need To Match.Tube TypeDo they need to match?12AX7No12AY7NoEF86NoEL34Yes1 more row
How often should you change tubes in amp?
You can expect a conventional amplifier tube to have a service life ranging up to 10,000 hours. Tubes with military specifications are built to last up to 100,000 hours.
Can I replace 12AX7 with 12AY7?
You can interchange a 12AX7 with 12AT7, 12AU7, 12AY7 or 5751 as they are all the same pin structure, however they will each give you a different result in your amp. Each of these tubes has a different gain factor, which means some will give higher gain and others lower gain.
Are ECC83 and 12AX7 the same?
The ECC83 Valve – also known as the 12AX7. The 12AX7 Valve (or 12AX7 vacuum Tube) is a small preamplifier valve which is identical to the ECC83 – same valve, just a different name. It has two identical triodes both of which have a high voltage gain. It is used in 99% of all guitar amplifiers.
Are 12AT7 and 12AU7 interchangeable?
The 12AX7, 12AT7, and 12AU7 all belong to the same family of nine contact, twin triode tubes. In many cases, these tubes are interchangeable and can easily be swapped. We will take a look at why you might, or might not want to swap out the different types of tubes.
Are 12AX7 and 12AX7A interchangeable?
no difference anyways. Correct. The 5751 has a lower mu than the 12AX7A so these are NOT equivalent. NEVER replace a 12AX7(A) and its’ equivalents numbers in a phono preamp unless you’re sure RIAA correction does not depend on its’ characteritic values.
Is 12AX7 the same as 7025?
The ECC83 (12AX7) Valve In ‘theory’ you’ll get a bit lower noise and lower hum with a 7025. Otherwise, they are identical.
Where is the 1960 Valvo ECC81 made?
Just arrived! NOS 1960’s Valvo ECC81 12AT7 made in Germany ‘probably Hamburg’ part of Philips Germany. Excellent NOS sounding scarse ECC81 tubes. Matched on Amplitrex AT1000. Price is for 1 pair of 2 tubes. Rare and in demand!
Where are Philips Miniwatt tubes made?
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.
What is a 6414 valve?
These 6414 were made and tested by Raytheon USA. This is high grade valve was selected for computer circuits and was used extensively by IBM and the American Military. The 6414 was only made in the U.S.A and has a 10,000 hour heater rating. It has the red Raytheon print and this is the 3 mica version, highly recommended for it’s HIFI quality’s. Very rare and in demand. The 6414 Raytheon was selected as It is a more ruggedly built, offers long life rating and is made to full military specifications. This valve is used by Manley Labs in a number of its studio products such as Voxbox, Massive Passive, ELOP, Mono and Dual Mono mic pre, SLAM, and Pultec EQ. Manley also use the 6414 in audio products such as Stingray amps and MAHI monoblock. This valve is used by many of our professional studio customers using Manly equipment. Limited availibility. Matched pairs on the Amplitrex AT1000. Price = for 1 matched pair of 2 tubes! New in 30 October 2020: 10 matched pairs for sale!!
What valves were made for the RAF in 1984?
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.
What is CV4024?
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.
Where was CV4024 made?
Mullard CV4024 made in the UK 1965 for the RAF single support O-getter with old shield logo of Mullard Mitcham factory matched pair 10,0/10,0 mA and 5000+ uMhos so NOS testing. What a difference these tubes make! Equivalent of 12AT7 and all ECC81 types. The NOS Mullard CV4024 tube is low noise and long lasting. This 12AT7 tube is a very good choice for hifi preamps, driver stages, and guitar amp reverb circuits. The Mullard 12AT7 is original production from Great Britain. Price is for one matched pair of 2 tubes. Quads matched also available!
