so i got this radio at a garage sale yesterday for a dollar and 25 cents. its beat and has been messed with but its a phillipine radio with a 1969 final. i tuned it up and it works fine...the strange part is if im on channel 18 for example i can here the person im talking to on channel 17, 16 and 15...radio is right on frequency and i tuned up the receive best i could...anyone ever experience this or have a clue what might be the problem..thanks