Rca1948FrequencyModu.. - The New Jersey Antique Radio Club

—PUSH-PULL CIRCUIT 459Since the output voltage of the 2 sides of a push-pull system areadditive, only half the voltage is required from each side of the systemand, therefore, only half the frequency change to produce it. It is,therefore, evident that the vibratory member is capable of producing alarge voltage amplitude with a relatively small capacity, resulting in avery small unit.2OperationThe push-pull FM circuit, built and tested, included a push-pullcondenser as its controlling element. This condenser consisted of a50if)