[Mondial]

Arran, there is a mistake on the 118 schematic. In the actual radio the driver plate and screen are connected together and the .006 uF cap connects to both, with the other end to ground.

Althhough the suppressor grid remains connected, the tube with the plate and screen connected together still acts as a low mu triode. The tube data sheet refers to it as triode connection and the characteristic curves shown reflect that condition.

http://frank.pocnet.net/sheets/093/4/42.pdf