Dear @lohanimal : Ste up transformers are not " rocket science " and does not changed in the last 40+ years. What changed was if are silver coiled or cooper or what ever but the functions stays the same.
I owned FR, AT, Denon, Entré and several other SUT's and with out doubt I can recomend to you the Denon AU-340 that I still own along the Denon AU-1000 ( both modified by me. ).
You can't go wrong with the 340 that works really good with any vintage or today cartridges:
https://audio-heritage.jp/DENON/etc/au-340.html
https://www.vinylengine.com/library/denon/au-340.shtml
Please take a look to the Denon frequency range against the top FR or any FR SUT, Denon outperforms any of them and this spec tell us a lot about the quality of those transformer designed by Denon.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.
I owned FR, AT, Denon, Entré and several other SUT's and with out doubt I can recomend to you the Denon AU-340 that I still own along the Denon AU-1000 ( both modified by me. ).
You can't go wrong with the 340 that works really good with any vintage or today cartridges:
https://audio-heritage.jp/DENON/etc/au-340.html
https://www.vinylengine.com/library/denon/au-340.shtml
Please take a look to the Denon frequency range against the top FR or any FR SUT, Denon outperforms any of them and this spec tell us a lot about the quality of those transformer designed by Denon.
Regards and enjoy the MUSIC NOT DISTORTIONS,
R.