Sovtek 5751

SOVTEK 5751 – 5751 vacuum tube for guitar amplifiers, to be installed in a preamp, analog of 12AX7 and 12AT7 tubes.

SOVTEK 5751 vacuum tube, analog of 12AX7 and 12AT7 tubes

The Sovtek 5751 tube is an affordable alternative to the 12AX7 tube used in original Fender Tweed amplifiers and can serve as a replacement for the 12AT7 preamp reverb power stage.

The 5751 is not a true 12AX7, but is often used in place of the 12AX7. They have only 70% of the gain of the 12AX7 and are often used to make a quieter guitar amp with too much gain.


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