Al,
Since you endorse it so strongly and repeatedly, I have no doubt that the Herron phono stage is truly excellent. All I can find out about the circuit is that it is headed by a 12AX7 input tube. That by itself is not a standout feature. So, do you have any insight into the circuit topology that would explain why it is so unique in its excellence? From the outside it looks to be just another 12AX7-based MM phono stage, of which there are dozens, old and new, but I’m sure I’m wrong.
Since you endorse it so strongly and repeatedly, I have no doubt that the Herron phono stage is truly excellent. All I can find out about the circuit is that it is headed by a 12AX7 input tube. That by itself is not a standout feature. So, do you have any insight into the circuit topology that would explain why it is so unique in its excellence? From the outside it looks to be just another 12AX7-based MM phono stage, of which there are dozens, old and new, but I’m sure I’m wrong.