![]() "Start" and "finish" are arbitrary terms with respect to this configuration. Replacement transformers are not always identical, so if you get squeals or other odd sounds when hooking up a new output transformer, try reversing the output leads. Ordinarily the black side should also be grounded, if the speaker is grounded. ![]() Plate lead (pri.) - blue (start)ī+ (power supply) lead - red (center tap) Is there a standard scheme for output transformer wire colors?ĭerived from the ARRL Radio Amateur's Handbook: (some exceptions not impossible. Is there a standard scheme for power transformer wire colors? The wiring is shown on the schematics but usually not the color codes. GRN - control grids, diode plates (and base 1 of transistors) ORA - screen grids (and base 2 of transistors) Is there a standard scheme for hookup wire colors?īLA - grounds, grounded elements, returns ![]()
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