The Design of Television Receivers Utilizing Non-Synchronous Power

Television receivers which are to receive U. S. Standard broadcasts and to utilize 50-cycle or other non-synchronous power sources require special design considerations to minimize interaction effects in the picture. These interaction effects usually take the form of picture siggle or flicker at a difference frequency rate. In this paper, design and measurement techniques are disclosed. Placement of the power transformer and precautions in regard to the heater wiring are discussed in particular detail with regard to their effect upon interaction. Production designs are disclosed and performance figures are given for two table model television receivers designed for use in non-synchronous power areas.