Abbreviation for automatic frequency control, a circuit commonly used in FM receivers to compensate for frequency drift to keep the tuner “locked” to a selected station.
"Got my recordings today. Was very impressed with the quality. One record was in such bad shape I never would have believed anything could be done with it. Dr Coban is great to work with and really shows he cares, not only by the great work he does, but also by the way he treats his costumers. Thanks a million! I will be sending more records in ..."