For those interested, I had my 1939 Imperial radio converted to FM. The electronic gizmos are contained on a small board aprox the size of an open match book cover & hidden within the radio case. The source for parts &/or information is, Antique Automobile Radio, Inc. 700 Tampa Road Palm Harbor, Fl. 34683 (800)933-4926--Local/Intl (813)785-8733 Fax (813) 789-0283 ( This info is from their 1997 catalogue) They were able to tell me of Dealers locations able to perform the conversion. The expense can be over $500.00. They also advertise Vibrators, Tubes, Transformers, Power Inverters, Voltage Boosters, Capacitors, Speakers, Antennas, & Dial Glass. That's All Folks Jim 1939 Custom Imperial Limousine C24