Automotive electronics: Tuneup for Detroit: New auto radios are rolling along in GM, Ford, and Chrysler products as electronics replaces mechanical tuners

Frequency-synthesized AM/FM electronic tuning is the latest word in automobile radios as Detroit's “big three” apply the state of the art in phase-locked loops, varactor tuning, and calculator-type logic. The main advantages are increased tuning accuracy, a virtually complete lack of frequency drift caused by temperature and voltage variations, and a potential decrease in both size and weight. The main disadvantage, at present, is price.