Hi everyone, I am new in this forum.
I am working on a phono preamp for a turntable, and I am having troubles with the design of the power supply.
Mi question is how can I get a negative voltage from a single dc source (like having only 12vdc), cause I have seen some comercial preamps that have a single dc input, also is it really necessary to make a design with negative voltage, because I found this schematic of a preamp and it does not seems to be using negative voltage at all.
Thanks for your help
I am working on a phono preamp for a turntable, and I am having troubles with the design of the power supply.
Mi question is how can I get a negative voltage from a single dc source (like having only 12vdc), cause I have seen some comercial preamps that have a single dc input, also is it really necessary to make a design with negative voltage, because I found this schematic of a preamp and it does not seems to be using negative voltage at all.
Thanks for your help