Can I use 12AX7 instead of 12AX7A?

These are not military tubes and are not NOS tubes at all. Also, as tube manufacturing became refined, the 12AX7A became much quieter. So much in fact that a lot of 12AX7A’s were labeled 7025’s (a very quiet version of the 12AX7). So the bottom line is that you can use either of these tubes in your Marshall amp.

Are all 12AU7 tubes the same?

By Ed Malaker. 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 these different types of tubes.

Are Chinese Vacuum tubes any good?

Modern Chinese Vacuum Tube Amps can be very good but are restricted by the cheap mass market valves that are produced purely for consistency and cost restraints. Chinese Tubes such as 6J1, for instance are a direct copy and hence a direct equivalent of Russian 6J1P etc, etc.

Can I use 12AX7 instead of 12AU7?

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.

Are Tung-Sol tubes good?

The current TungSol 12ax7 is by far the best quality out there . The highs are clear and clean an the entire sound is transparent compared to a JJ . Yes , they’re somewhat more expensive , but for V1/2 in a clean amp they are unbeatable , Tubedepot will provide every possible grading option too , which others don’t .

What is the best substitute for the 12AX7?

Also included in this comparison are direct substitutes for the 12AX7 including: ECC83, ECC803, 7025 and 5751. The 12AX7 is a 9-pin miniature, high-mu, twin triode.

Are all 12AX7 tubes the same?

Thank‐you. The Chinese (Sino) 12AX7 tube (made by Shuguang) is popular with Marshall owners for its gain and bite. It is currently re-branded by Penta, Ruby Tubes, Groove Tubes, and many others. Regardless of the name, they are all the same.

Do all 12ax7s have the same gain?

Ideally, every 12AX7 should yield the same gain when placed in the same circuit. However, in reality there are comparative gain differences among 12AX7s. The purpose of this comparison is simply to provide guitar players with a frame of reference to help in finding the best current production 12AX7 for their needs.

What is the preamp circuit used for 12AX7 comparison tests?

Schematic of the preamp circuit used for 12AX7 comparison tests. A custom 12AX7 switching box was constructed to allow for a quick switch comparison of six tubes at a time while plugged into the V1 socket of a Marshall JCM800 2203 guitar amplifier.