F1nut wrote:Brian, if you can run 5751's in your pre, the late '50's Sylvania triple mica, black plate, D getter are to die for. They have thin yellow print. Do not get the later version with the green print.
5751s have a specified amplification factor of 70, the 12AX7s, 100. According to Bob, the phono PCB in the Sunfire Preamp needs all the gain the 12AX7s have to offer in that application. Perhaps some have had better luck than I... Brian, what was your experience?