Stock 6V6 tubes (left), NOS Sylvania 6V6 tubes (right). V1 12AX7 (preamp) For the V1 12AX7 you can substitute a 5751, which has less gain. As with all tube substitutions, some prefer the higher gain of the a 12AX7, while others like me, prefer a NOS 5751 in ...
Power tubes Preamp tubes Rectifier tubes More products Entire Inventory Home » 7729=12AX7 Raytheon Uniline Gold Pins (sold out) 7729=12AX7 Raytheon Uniline Gold Pins (sold out)$ 0.00 Sorry, this product is sold out!0 low noise tube) 7729=12AX7 Raytheon Uniline Gold Pins 1960'...