The cap shoud go across AB and AG. Across T and R you would 'filter' the audio out! Try for at least 35 Volts, 50 even better. You may be overloading the 'A' battery supply, be careful. ITT601 power supplies are not nearly as forgiving as as the big grey 1A2 power supplies from Elgin or whoever. That little regulator card is small in size AND capacity. John C. (Not Garand)

When I was young, I was Liberal. As I aged and wised up, I became Conservative. Now that I'm old, I have settled on Curmudgeon.