My new VTPH-2 is breaking in nicely. Tough to say I've ever heard a better phono pre and I've heard (and owned) a lot of them! I've got the version with 2 12ax7s. Any suggestions from other Herron users for NOS?
Speaking of the Herron phono amp and 12AX7 tubes.....the 5751 tube is said to be a 12AX7 substitute, a military grade tube with slightly lower gain than the 12AX7. Does anyone have experience with the 5751 in a circuit designed for the 12AX7?
Thanks ochremoon. In the 80's I had the Frank Van Alstine Super Pas in which he used 5751's (Sylvania, if memory serves) instead of 12AX7's, for their linearity and low noise said Frank. I had Keith send my VTPH-1mm with two 12AX7's and two 12AT7's in order to get the lower gain and higher overload margin that combination affords. I use a very high output cartridge (5mv!), so I don't need the gain. I believe I'll audition a pair of 5751's in place of the 12AX7's myself.
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