WRAP UP -- Part 1...
Comment: Because this is a development model, the original good can cap is still in place and in use, providing good service. As a result, the 10 uF section originally used to decouple the phase inverter stage is now used to decouple the screen grids, with a new discrete decoupling cap added to decouple the phase inverter stage. Because the screen grid decoupling cap is so small, no Screen Stability resistors were required in the development model, and are not shown in the pic provided. However, they ARE shown on the amplifier page, since any unit destined for regular service will almost certainly have the can cap replaced, with 40-50 uF being a good practical value to useat this point. With such a value, Screen Stability resistors will be required, andare therefore shown on the schematic.