Arvin b-w; no HV. Magnavox 1966 Magna-color, needed components in HV regulator section replaced and new 6BK4, needed tube socket on board replaced as it had burned. 1979 RCA CTC-92 Colortrak, replaced power switch (you can see replacement on top), added picture tube filament booster circuit consisting of extra turns around flyback and switch to select normal or boosted fil. voltage.