Tube Preamp: 12AU7 Tungsram. (= ECC82).Gain factor 19. NOS=New Old Stock from 1970s!!

Perfect for your old Vox or for Fender REVERBs 12AX7 (= ECC83, 7025, ECC803, E83CC, 6681) : GAIN 100,..... 5751: GAIN 70,..... 12AT7 (= ECC81, 6201, 6679) : GAIN 60,..... 12AY7 (= 6072 : GAIN 45 12AV7 - 5965) : GAIN 41...... 12AU7 (= ECC82, 5963, 5814, 6189) : GAIN 19..... Preamp Tube Gain Factor Choosing pre-amp tubes by gain factor One simple tweak that is favored by guitar amp users is to plug in a pre-amp tube with a slightly different gain factor. Replace the V3 12AT7 Reverb Driver tube with a lower gain 12AU7 to give you more usable room on the Reverb Control. The Reverb pot can be a little touchy with a usable range from 0 to 3 or 4. A 12AU7 wont push the reverb circuit as hard so the usable range can extend up to 5 or 6 on the dial and make dialing in just the right amount of reverb easier. The lower gain 12AU7 can also reduce reverb circuit noise.. Superdeal 350 SEK