[MrFixr55]

Hi Hamilton,

Sorry for not catching your PM.  I will be happy to do so.  Unfortunately, I do not have facilities to easily scan a document since I retired, so it will take me some time to draw and scan a specific one.  I will try to do so.  However, let's try this:

The pic below is your volume control from one of your posted pix.  Note the numbers.  BTW, the connection noted as number 1 should be well grounded to the chassis.

   

The next pic is a portion of the Philco 650 Schematic showing the volume control.  The numbers correspond to the numbers on the picture of the volume control.

   

To add a Radio - Phono Switch and Phono connection, do the following:

Obtain a single pole double throw switch and a chassis mount RCA Jack and some shielded cable.  Mount these in a convenient location on the chassis, but preferably away from the power cord and power transformer.  If there are no convenient holes on the chassis and you do not want to drill holes, then make a metal bracket.  SPDT switches are usually marked C for Common, 1 and 2, or something similar.  If not marked, the middle terminal is usually the common.

Disconnect all wires from terminal 3 of the volume control.  Connect these to one of the end terminals of the switch using a length of shielded cable.  Connect the common terminal of the switch to terminal 3 of the volume control using another piece of shielded cable.  Connect the RCA Jack to the remaining terminal of the switch.      Connect the shield at only 1 end, unless the switch and jack are not mounted to the chassis, or if mounted on a bracket, if the bracket is mounted to the cabinet and not the chassis.  In that case, ground both ends of the shield, one to the chassis, one to the bracket, but do so for only 1 shielded cable.  This is to prevent "hum" from "Ground Loops".

This jack will handle a ceramic phono cartridge or "line level" inputs such as fro a computer, CD Player, etc.  You could connect a guitar to the radio using this connection and the appropriate cable or adaptors.  It will not be really loud or distorted but will have a warm tone.

BTW, seriously nice job on the cabinet!  A beautiful radio!