corgan4321
Well-known member
I built Martin's 1290 preamps and added the slow-start circuit he linked to. I looked at the output of the phantom on a scope and found I'm getting a rise time around 50ms. Not too much of a slow start...
When I did a search for slow start here I found most people talking about a circuit with some sort of FET or other active device. It is impossible to achieve slow-start phantom power with passive components? Or did I just do something wrong with this little circuit?
I've attached the circuit I used which was linked to by Martin in the 1290 thread.
When I did a search for slow start here I found most people talking about a circuit with some sort of FET or other active device. It is impossible to achieve slow-start phantom power with passive components? Or did I just do something wrong with this little circuit?
I've attached the circuit I used which was linked to by Martin in the 1290 thread.