I have added the cathode stage but there is a severe problem with a popping sound coming once every second. I will try to find the cause of that before any further work
Probably a low frequency oscillation through the power supply.
Increase the supply capacitance values, and/or add supply decoupling between the first and second stages.
In a bad case, also reduce the value of the coupling capacitors between the first and second stages.
Increase the supply capacitance values, and/or add supply decoupling between the first and second stages.
In a bad case, also reduce the value of the coupling capacitors between the first and second stages.
Exactly. This is motorboating, and it can be caused by PSU coupling between the first two stages. Adding the missing decoupling RC for the first stage should fix it.
Or ditch this poor design and use something that’s going to work.
EJP
Or ditch this poor design and use something that’s going to work.
EJP
