SU1 (Supply Unit No.1 Mk.I) -
Power supply unit for Wireless Sets No.19 Mk.II. Fed
by car battery delivering 12 VDC filament voltage (up
to 10 A) and two high voltages - 275 VDC (110 mA
max) and 500 VDC (50 mA max). WHD = 152 х 216 х
318 mm, weight - 11.4 kg.