The 12AT7 is not electrically like the 12AX7, but they will work in a socket wired for the 12AX7. The 12AT7 will provide noticeably less gain than a 12AX7, assuming you use it in the phono input/voltage gain stage of a phono stage. And the 12AT7 is likely to sound better with a higher plate current than what is normally used for the 12AX7, in keeping with its much higher transconductance.
Zesto Andros II with ESP vs Modwright PH 9.0 XT?
About to make a big phono stage upgrade. Has anybody compared these two or have experience with either? Cartridge will be a Soundsmith Carmen II, but I also have a low output Hana that I could use.
The MW with the X upgrade and the tube rectified PS puts it in the same fiscal neighborhood as the Zesto.