What amps use 12AX7 tubes?
What amps use 12AX7 tubes?
The most common preamp tube for tube guitar amplifiers is the 12AX7. They have been in use since 1947 – so the Fender Tweed’s, Vox’s, Supro’s, and many other amps up through the modern Marshall DSL100 amps use 12AX7 preamp tubes.
Are 12AX7 power tubes?
12AX7 (also known as ECC83) is a miniature dual-triode 6AV6 vacuum tube with high voltage gain. Developed around 1946 by RCA engineers in Camden, New Jersey, under developmental number A-4522, it was released for public sale under the 12AX7 identifier on September 15, 1947.
What tubes are compatible with 12AX7?
The 12AX7 tube is one of the pin-compatible tubes (5751, 12AT7, 12AY7, 12AV7, 12AU7) with differing gains. Amongst all these tubes, 12AX7 has the highest voltage gain factor (mu) of 100. The high gain factor and the dual-triode configuration allow the tube amp designer to build an amplifier with fewer components.
How does a 12AX7 tube work?
The 12AX7 middle and right is a dual triode tube–two tubes in one. Pin 1 connects to the Plate (output), Pin 2 the Grid (input), Pin 3 the Cathode (source of electrons). Pin 6 connects to the ‘B’ triode’s Plate, Pin 7 the Grid, Pin 8 the Cathode. The Getter Flash absorbs gas molecules to maintain the tube’s vacuum.
Are 12AX7 preamp tubes?
The Electro-Harmonix 12AX7 gold pin preamp vacuum tube presents a stable, uncolored tonality with a gentle amount of signal gain. The Genalex – Gold Lion B759 / ECC83 / 12AX7 Preamp Vacuum Tube presents a stable, clear tonality with a gentle amount of signal gain.
Can I use 12AT7 instead of 12AX7?
The 12AT7 tube is almost identical in looks to the venerable 12AX7 tube, and in many ways can be used for the same applications as a 12AX7. However, the 12AT7 features a somewhat lower gain (typically about a factor of 60-70) and runs at a higher current.
Are all preamp tubes interchangeable?
You should be able to swap preamp tubes of the same type without problem. For example, any 12AX7 should be compatible with another 12AX7. In some cases, “families” of tubes, mostly preamp tubes, are compatible, such as the “12A” family of preamp tubes — 12AX7, 12AT7, 12AU7, 12AY7.
What do you need to know about 12AX7 tubes?
12AX7 is a small signal tube with high gain. Tubes such as 12AV7, 12AU7, 12AT7 are siblings of pin-compatible tubes with differing gains. 12AX7 is the big brother of them all with the highest voltage gain (mu). 12AX7 allows the amp designer the freedom to build high gain amplifier circuit with less components.
What’s the difference between a 12AX7A and a Chinese twelveax7b?
What is the difference between a 12AX7A and a Chinese 12AX7B? ANSWER- The Chinese 12AX7B tube has a higher gain and a little more overdrive than the standard 12AX7A tube. It also is a quieter and Warmer sounding tube. It is a good tube to use for higher gain guitar amplifiers.
Can you substitute a 12AX7 for a 12AT7?
ANSWER – You can substitute a 12AX7 for a 12AT7, 12AU7, 12AY7, 5751 or a 7025. But what are the differences? It depends on which tube you are replacing. Let’s assume it is the first preamp tube. 12AT7 * * * * The 12AT7 is a clearer sounding tube than a 12AX7 but with a little less gain.
What is the amplification factor of a 12AX7?
All 12AX7 tubes have an amplification factor (μ) of 100 (“high-mu”). Ideally, every 12AX7 should yield the same gain when placed in the same circuit. However, in reality there are comparative gain differences among 12AX7s.