div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: Steves Antique TechnologyThe 546-A and 650 use a 3AP1 cathode- ray tube Model 655 uses a 5CPI-A a 5-inch cathode-ray tube This necessitates use of 63-volt filament winding in src=https:reader030fdocumentsusreader030viewer20220130225f8f1ffa4e54fe37ad4d67b6html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: Steves Antique TechnologyThe 546-A and 650 use a 3AP1 cathode- ray tube Model 655 uses a 5CPI-A a 5-inch cathode-ray tube This necessitates use of 63-volt filament winding in src=https:reader030fdocumentsusreader030viewer20220130225f8f1ffa4e54fe37ad4d67b6html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdiv