I would think that an input jack, wired to the plate of the second detector tube might do the trick. I don't know whether attenuation would be needed, but shouldn't be hard to set up a separate potentiometer if needed. It's also possible that the mp3 output might not be sufficient? I'd like to know this myself, as I haven't tried this yet. A switch may be added to cut the radio signal when the mp3 is playing through the radio's amplifier and speaker, or it may only be necessary to detune the radio so no station is being received. Another approach that would eliminate the necessity of modifying the radio would be to hook the output of the mp3 player to the input of a wireless AM transmitter which could be hidden in some convenient place. Andy Baron On Jun 25, 2007, at 12:50 PM, Dennis Back wrote: > > --- pjfraser at alamedanet.net wrote: > >> ... and altho we >> don't do that in our >> old cars (baseball or "oldies" AM stations fit well >> in 60's vintage stuff) >> there're lots of nice portable ipod speaker systems >> out there. > > Great speakers for this. Thanks for the link. > > But...I my mind, having the ipod and the speakers > "somewhere" is a bit weird to me. You're riding > around in an old car and the music is coming from > "somewhere"??? > > Now I know that some old, period auto radios had > speakers coming from under the seat. So..... > > What I think would be more "in period" would be having > your ipod/mp3 player feed a signal INTO an old radio > and playing OUT of the old radio, which shouldn't be > hard to do. I just haven't had the time (or > inclination) to do this just yet on my setup. > > Any comments? > > Dennis > > > > ______________________________________________________________________ > ______________ > TV dinner still cooling? > Check out "Tonight's Picks" on Yahoo! TV. > http://tv.yahoo.com/ > _______________________________________________ > Phono-L mailing list > http://phono-l.oldcrank.org