08-21-2009, 09:57 AM
Hi Zapped,
Check to see if the 10 mfd cap (part #6) has the polartity correct. Looks like the positive end goes to ground and the negative connects to the 200 ohm resistor. Make sure the 70 ohm (part 13) connects to ground. This is going to give you negative bias for the 6f5 output tube. Maybe -15 volts. You can also check resistance between center tap and plates of your rectifier tube. They should be within maybe 10 ohms of being the same.
Terry
Check to see if the 10 mfd cap (part #6) has the polartity correct. Looks like the positive end goes to ground and the negative connects to the 200 ohm resistor. Make sure the 70 ohm (part 13) connects to ground. This is going to give you negative bias for the 6f5 output tube. Maybe -15 volts. You can also check resistance between center tap and plates of your rectifier tube. They should be within maybe 10 ohms of being the same.
Terry
