RADIO RECEIVERS [ TELEVISION RECEIVERS, ] PHONOGRAPHS COMBINATION RADIO RECEIVERS AND PHONOGRAPHS, [ COMBINATION RADIO AND TELEVISION RECEIVERS AND PHONOGRAPHS, ] AND REPLACEMENT PARTS FOR SUCH RECEIVERS AND PHONOGRAPHS, TRANSFORMERS, TUNING COILS, ELECTRONIC TUBES, RADIO TUNING DEVICES, AMPLIFIERS, CONTROLS FOR AUDIO FREQUENCY AMPLIFIERS, FILTERS FOR AUDIO FREQUENCY CIRCUITS, EQUALIZERS FOR AMPLIFIERS, SPEAKERS, SPEAKER ENCLOSURES, HORN TYPE SPEAKER ENCLOSURES, AND TURNTABLES AND CHANGERS FOR PHONOGRAPHS