Hi Kartapus Grid & FET input are 2-3pf, so I think 2-3pf and 50k breaks about 1.5MHz.
A Audio1Man Member Joined 2010 sound-logic-la.com 2021-06-28 2:01 am #21 2021-06-28 2:01 am #21 Hi Kartapus Grid & FET input are 2-3pf, so I think 2-3pf and 50k breaks about 1.5MHz. ••• More options Share E egellings Member Joined 2010 2021-06-28 8:22 pm #22 2021-06-28 8:22 pm #22 The resistor prevents possible parasitic oscillation by forming a low pass filter with the itself and the tube's input (Miller) capacitance. The R will also limit RF pickup problems using the same Miller effect mechanism. ••• More options Share Prev 1 2 First Prev 2 of 2 Go to page Go Show hidden low quality content You must log in or register to reply here.
E egellings Member Joined 2010 2021-06-28 8:22 pm #22 2021-06-28 8:22 pm #22 The resistor prevents possible parasitic oscillation by forming a low pass filter with the itself and the tube's input (Miller) capacitance. The R will also limit RF pickup problems using the same Miller effect mechanism. ••• More options Share
The resistor prevents possible parasitic oscillation by forming a low pass filter with the itself and the tube's input (Miller) capacitance. The R will also limit RF pickup problems using the same Miller effect mechanism.
