05-29-2014, 08:08 PM
Your socket voltages on the 6H6 would all be zero volts in that circuit. Your AVC voltage is developed across the volume control. Check across the top of the volume control and ground. The voltage will change with the strength of the stations. It should be somewhere around -1 to 2 volts when not on a station at all, and perhaps as high as -14 volts or so on a strong station.