Walyfd -- Perform the following measurement with the unit turned off and unplugged:
1. On pin #1 of each 7247 phase inverter tube, there is an 18K 1 watt resistor connected (brown-gray-orange). Use your ohm meter to measure each of these resistors, marking their exact value down, and noting which resistor goes with which channel. Connect your red lead to pin #1, and the black lead to the other side of the resistor being measured when making the measurement.
2. Locate the two phase inverter controls. Each will have three terminals of which two are connected together. Select a control for one channel, connecting the black lead of your ohm meter to the two terminals that are connected together, and the red lead on the third terminal of the control.
3. Adjust the control so that the resistance reading exactly matches the resistance of the 18K resistor associated with the channel for the control you are setting.
4. Perform the same exercise for the other channel.
5. Enjoy!
Dave
1. On pin #1 of each 7247 phase inverter tube, there is an 18K 1 watt resistor connected (brown-gray-orange). Use your ohm meter to measure each of these resistors, marking their exact value down, and noting which resistor goes with which channel. Connect your red lead to pin #1, and the black lead to the other side of the resistor being measured when making the measurement.
2. Locate the two phase inverter controls. Each will have three terminals of which two are connected together. Select a control for one channel, connecting the black lead of your ohm meter to the two terminals that are connected together, and the red lead on the third terminal of the control.
3. Adjust the control so that the resistance reading exactly matches the resistance of the 18K resistor associated with the channel for the control you are setting.
4. Perform the same exercise for the other channel.
5. Enjoy!
Dave