Hello

im interested into modifying the TT-Kit PX45 , replacing the tt-otjtm45D output transformer with TT-DR504 Hiwatt Output transformer , and instead EL34/KT66 , to replace them with two 6550 tubes, my technic question is regard the power rectifier section , if it needed to change or to keep the same and the bias adjust if that also need to change or not , plus the connection on the grid 1 the resistor 1K5 5w value , and also the values on the Grid 2 connected to the bias values: 2M2 and 5K6