The amplifier section of the radio amplifies whatever signal its given, so since i now had a free band, the FM will now be the AUX input. I wanted the AM to still work and be able to switch between the two, also i wanted to use the volume on the radio to control the audio level.
some people used AM transmitters or FM transmitters and even bypassing everything directly to the speaker to do this, but thats just not the same as the sound actually being produced by the radio. plus it wouldnt have that old radio sound. i spent 3 days reading up on this and which tube i hopefully can hook it up to. i came across this website: http://tubedata.tubes.se/sheets/093/6/6T8.pdf
which is for the 6T8 tube, which is the preamp tube. this tube has 3 inputs two are for the AM/FM detector and the third is beginning of the audio part.
i used the schematic to find the FM input post on the bottom of the tube and put a wire on that and another wire on the audio input post. then to be sure i turned it on and put it on a multi meter to make sure i wasnt hooked into power, and it showed 0 volts. next step, i ran the wires to my cd player and plugged it in, turned it on, and like it was meant to be, perfect clear sound coming from the radio speaker. yay! i turned it to AM with the cd player still going, and it was just AM so my new input wasnt on the AM circuit. turned it back to FM and it was there and the radio controlled the volume like i wanted so everything works like i wanted it.