Great explanation thank you ppluis0 !

Thanks Jose now i see. But i have to remove 470K and 22nF anyway, right? Just a High input signal to grid with the 1M resistor to gnd. Yeap the 100K plate res mod looks promising too have also heard about that. BTW nice diagram of this unit as the two 12AX7 in the preamp section have their heaters f...

Hello everyone, first post here. Calling @modman, found a Geloso G 227A and after fully repaired, want now to mod its one input only like in Bassman. I am planning to add a cathode res in first pre tube (pin 3) 1K and 25uF in parallel to gnd and replace the grid 3.3M with 1M resistor. Do i need to a...