I'm new here. Was an application engineer for years. I rebuilt a ST-70 from the chassis up with a 6gh8a driver board and improved the PS with PP bypass and better coupling caps. This amp uses the C-24X triad used by Mr. Latino. While that some what addresses max current and is physically compatible it still seems like you are pounding on it. It also does not have the same Henry value as the orginial. I'm installing a 6sn7 Mullard type driver circuit in the new ST70 I'm building. Without the consideration for component dimension, would a choke with larger electrical capacity i.e. 1.5 H @ 300ma/ 400 WVDC 40ohm DC resistance be better suited for this? Hammond makes this spec a 158TA, it can be applied with an accommodation for adding a small of height to the chassis.
It would seem that a larger amperage capacity of 300ma in max current and an1.5 Henry value closer to the original of 1.75H would be more of an improvement. The chassis mod is incidental to me.
Thanks up front for your input.