[TN Allen]

There's a few ways to go about it. Cheap and dirty is solder a .01 mfd cap to the junction of #28 &30. use the unsoldered end and the chassis for the input. Ground the ant post so you won't hear any radio signals.
You could add a radio /phono switch break the connection from 28 to 30. 28 is the audio output from the radio. 30 is the input to the amplifier. Use a switch to connect either the radio audio (28 ) or the phono to 30.

Terry

This works nicely, although I tried grounding the antenna, but that increased the noise. I'll add a switch later.

The volume is adequate with either the Garrard through a cheap preamp, and the CD player connected directly to 28&30. I may want to amplify the input a little more later. It's fine in the small room where the Phico sits presently, but may need a little more volume in a larger room, as it is I have the volume at maximum.

Thank you for the suggestions.