Are you getting a 60hz hum when the phono preamp is hooked into your receiver/computer?
This RCA to 3.5mm plug is what you will need for your computer hookup.
And here it is in action!
We also have a regular 'RCA' to 'RCA' patch cord to connect the output of the pre-amp to your stereo. If you don't have any additional 'RCA' type stereo patch cords sitting around you may wish to have us send one along with your new preamp.