Fender Tweed/Marshall question

[Fred G.]

On the last tube stage before the PI in a Marshall or Fender Tweed (the stage with the tone stack), there is no plate resistor, and there is a very high value cathode resistor.

Will someone fill me in on why this stage is set up this way? Just trying to get a better understanding...

Thanks,

Fred G.

[Satamax]

Do you think i'm talking gibberish

Read dis!

http://vintageradio.me.uk/novice/261203/cathfollow1.pdf