Test set ac output 120 v ac, 57 to63 cycles single phase w/external variable power transformer 120 v ac, 60 cycles single phase w/external constant voltage transformer; dc output plus 6 v at 1 ma, minus 6 v at 1 ma, plus 12 v at15 ma, minus 12 v at 6 ma, minus 26 v at80 ma, minus 28 v at 15 ma, plus 150 v at 15 ma, plus 270 v at 15 ma, plus 275 vat 15 ma, minus 275 v at 15 ma, plus 300v at 15 ma, 330 v at 15 ma