Quick voltage question

[LooseChange]

What is the voltage at the two preamp power nodes? HT-D and HT-E

[Normster]

It depends on your dropping string, but generally about 320 and 310 (give or take a few volts).

[LooseChange]

Normster, Thanks.
I am of reverse engineering in my attempt to add a D type preamp circuit to an existing build.