03-14-2015, 07:23 PM
Pin 3 and pin 4 are both low.
Check the 9K resistor 39 and the 32K resistor 42. Both these resistors will drift high in value or open, causing low voltages on the 6A7 and no oscillation.
Check the 9K resistor 39 and the 32K resistor 42. Both these resistors will drift high in value or open, causing low voltages on the 6A7 and no oscillation.