You’d think that might work but it’s only good for less tweaky measurements. The only reliable way I’ve found to tweak out a phono cart is mounted on a turntable playing a record. Maybe because the generator doesn’t mimic the L and C of the cartridge coils?You could "divide and conquer" by splitting up the issue, like driving the phono input from a signal generator, thru the transformer, or two of them back to back if generator does not have 5 ohm output ;-).
Mr. CMRR described complex circuit interactions and that’s what I hear. It’s hard to put your finger on exactly what’s happening.
The KA Electronics PTS can be constructed in many ways. My request for the design was a remote mounted preamp with a balanced front end. For playback from the lathe.
In this day and age I can’t understand why the standard phono interface isn’t balanced. It would improve playback sound quality more than the best of everything would. For both MM and MC carts.
I haven’t built Wayne’s MC front end but it’s on the list. I plan on using the MM front end with a transformer in front of it.
That’s what I’m doing now for the DL103 on the lathe and what I will do for the SPU on the Shaker Phono System I am in the middle of building.
It will have three tonearms with a Denon DP80 turntable. Each arm will have a dedicated PTS and each cartridge will have a dedicated front end.