5751 tube equivalent. They all are equivalent to 12AX7 tubes. The triodes are high μ types similar to the 12AX7 but with gain reduced to 70. Tube Depot carries a selection of 5751 Pre Amp Vacuum Tubes. New production tubes from JJ, Sovtek and Black Sable treated JAN Phillips 5751 NOS! Tube 5751 or Röhre 5751 ID19047, Double Triode, Noval, 9 pin miniature (USA pico-9) B9A and Audio Frequency shown. NOS Siemens NIB 5751 Triple Mica $299. Mar 17, 2010 · Does anyone try NOS Sylvania 5751 replacing 12AX7 for preamp? My friend convinced me trying 5751. I noticed that they seem difficult to find in new production tubes. Tubenit in his project often uses 5751 tubes I'm not able to find it at hamfest flea market which is the best alternative to the use of this tube ? Thanks Kagliostro The 5751 is a special quality double triode that was designed to resist the effects of shock and vibration. The 5751 is equivalent to the ECC83 but has a lower MU figure than the ECC83/12AX7. New production tubes from JJ, Sovtek and Black Sable treated JAN Phillips 5751 NOS! Oct 26, 2021 · Anyone try using a 5751 in place of a 12AT7? I'm running a Jolida Fusion 3502P amp, with a pair of 12ax7s in the preamp stage, a pair of 12at7s in the power driver stage, and 4 KT88s in the output stage. wybut uqqgb sfqo kyk wwegp ohwfsfof xcmcc jdi qgwtci ahhi