Since the original discussion is pretty far down, here is the schematic for the 12at7 phono pre amp:
The currents are 2.85 and 4ma and I have not selected tubes for noise but more for tone and dynamics. Wound up with GE 3 micas.
The output impedance is 10k for the first stage and 14k for the second, thus the advantage over the 12ax7 pre.
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Topic - ping freddyi re: 12at7 phono pre schematic - john8417 15:07:59 03/02/06 (0)