salomonander
Well-known member
- Joined
- Aug 28, 2011
- Messages
- 913
hey guys
im going mad trying to use a jfet for audio muting. it took me a while to understand how these fets work and in my led test everything seems fine.
i insert ground to the source and an LED between drain and 5v (with resistor) and the led lights up. as soon as i put -5v on the gate the LED goes off.... so i guess this is all fine.
but it wont work with audio at all. no matter how i move the pins around i cant seem to make the audio shunt to ground. i tried connecting audio in and out to the source and both grounds to the drain (tried it the other way as well). shouldn't it mute in that case (connect audio go to ground)?
it doesnt do anything. when connecting audio in to source and audio out to the drain i have a constant signal. i can connect -5v to the gate but still have no mute. i dont get it
i even tried to copy the studer 169 mute circuit but still no luck. im using bf245a. is that the problem?
im going mad trying to use a jfet for audio muting. it took me a while to understand how these fets work and in my led test everything seems fine.
i insert ground to the source and an LED between drain and 5v (with resistor) and the led lights up. as soon as i put -5v on the gate the LED goes off.... so i guess this is all fine.
but it wont work with audio at all. no matter how i move the pins around i cant seem to make the audio shunt to ground. i tried connecting audio in and out to the source and both grounds to the drain (tried it the other way as well). shouldn't it mute in that case (connect audio go to ground)?
it doesnt do anything. when connecting audio in to source and audio out to the drain i have a constant signal. i can connect -5v to the gate but still have no mute. i dont get it
i even tried to copy the studer 169 mute circuit but still no luck. im using bf245a. is that the problem?