Harmony 400a widowmaker

[LarBal]

I have one of these in for an isolation transformer, I have a triad 1:1 here, and just want to make sure of the wiring.
I'll add a new 3 prong cord, the hot of which will got to fuse then switch then one primary of the xformer, other primary straight to neutral white wire, green to chassis ground.
The secondaries is where my question is. One will obviously go to the plate of the recifier and the 100r resistor in the heater string.
But the other secondary will go to chassis ground? along with shorting across the 30n/100k, effectively grounding the lower leg of that filament transformer primary for the 12au6?

[mozz]

I had one, added a isolation trans and rewired it to a old cheap vox schematic instead of that mess they used.

[LarBal]

Thank, I rewired it as I described and it worked great. moving lead dress around got the amp quiet too

[Helmholtz]

Make sure that all user accessible metal parts (including the iso if accessible) are safety grounded.
Also add a mains fuse before the iso.