I just put everything back together with an ac filament voltage, and I have 7.2 VDC to feed the LED.

Maybe you can mark up the schematic in post 35? I'm not sure what you have now.

 

Maybe you can mark up the schematic in post 35? I'm not sure what you have now.

I've uploaded the schematic for the whole preamp. The LED is on the lower left corner, and I've put 1KOhm resistors in for the value of the resistors that I'm asking about. I'm not sure if they are right or not. I've measured the voltages and I get about 4 VDC one way and 5 VDC the other way. The LED works, but I want to be sure of the correct values for the resistors. There is supposed to be 2.1VDC forward voltage with 5VDC reverse voltage.

 

I've uploaded the schematic for the whole preamp. The LED is on the lower left corner, and I've put 1KOhm resistors in for the value of the resistors that I'm asking about. I'm not sure if they are right or not. I've measured the voltages and I get about 4 VDC one way and 5 VDC the other way. The LED works, but I want to be sure of the correct values for the resistors. There is supposed to be 2.1VDC forward voltage with 5VDC reverse voltage.

To measure the voltage you need to put the meter right across the LEDs.
You could make them brighter by lowering the 1K resistors. But no smaller the 470 ohms.

 

To measure the voltage you need to put the meter right across the LEDs.
You could make them brighter by lowering the 1K resistors. But no smaller the 470 ohms.

Thank you! I really appreciate it!

 

Thank you! I really appreciate it!

I just hope your hummmm is gone!

 

You have 6.3Vac: power LEDs by ac and two diodes: the relay switches between the cathode of a diode and the anode of another diode. The relay goes to the LEDs. In position "A", positive voltage turn on red; in position "B", negative voltage turn on green