I am a DX'er, one who loves to listen and log distant radio stations (HD radio's legalized jamming notwithstanding
). So, I always like to check out unique antenna designs. Someone has made an AM antenna out of 125' of wire, a variable capacitor (for peaking the signal) and a Sterilite, or similar storage crate. I am going to build one for DX purposes but I think this may be exactly what Dramrock needs. The cost for parts would be about $25. If you want to use the terminals on the back of your HD radio, you need to add one or two turns to the back of the loop and this goes to the radio. This is called a "sense" or "pickup" circuit.http://www.dxer.ca/component/option,...207/Itemid,77/
Also Terk makes a nice AM loop for about $40 but the "Crate Loop" easily beats that per info that I have read. You have the right idea in dismantling the Sony loop and using just the wires as a longwire antenna but the wires could be much longer. Good Luck.