[Texasrocker]

I have added CD/ Ipod type inputs to a few different brands of tube type radios over the years with mixed results as/ per customer requests. The audio quality doesnt always sound that good anyways after all the hassel. To keep the radio signals out, you will have to add a switch to break the radio circuit where you input the signal thru the amplifier sections only. Since portable Ipods & portable CD players have their own volume controls, you can bypass the radios controls and use the volume of the Ipod to control the volume. In many cases however, your mixing apples & oranges to try to get a distortion free signal due to impedance mismatches, it's really not worth the trouble for the sound quality that any radio produces from the getgo, nomatter Console or tabletop types. A LPAM transmitter would be the best solution as others have suggested, and keep the radio chassis original.AES sells a LPAM kit as many others offered on the internet. I have a home brew 12 watter plate modulated rig here that does about 10-20 miles ( depending on antenna & radials testing) using a 6L6 or 6550 in the final, but it's not street legal! Last time I played around with it, I custom-wound a loose-coupled tank circuit and it would tune up anywhere from about 950- 1600 khz, and the RF output will light up a neon bulb laying on the other end of my workbench. It has great tone quality also over the air! Can drive around many miles, and the signal rivals local AM stations (daytime) Nightime, the other stronger stations limit it to about 2 miles or so. Still tweeking it when I have spare time. I have a ol-timer USN retired radio tube- tech helping me with it. We have fun here playing with transmitters indeed, but dont fire it up very often for obvious reasons.