RCA AR-88D chassis underside, showing excellent screening arrangements. All rotary switches have ceramic wafers like those shown here. The multisection smoothing block is being rebuilt using 3 pairs of 10µF/450V/105°C high reliability electrolytics in series, each capacitor strapped by a 220kΩ TR6 metal oxide voltage balancing resistor. This gives 5µF/900V/105°C per section instead of 4µF originally, with a total effective bleed resistance of 147kΩ.