Subject: Re: [Amps] [BULK]Re: [BULK]Re: cathode to ground in tetrode amp The 22 uH and 1000 pF in the grid peaks at 1 MHz and rolls off at 12 dB per octave after that. Can anyone tell me why they put a 12K resistor from screen to ground? Its on the load side of the screen current meter. Perhaps negative screen current sometimes? -JT