[Ron Ramirez]

You nailed it, Mondial...thanks. And upon further examination of the circuit, your explanation makes sense.

I didn't have a 470 ohm resistor so I used a 390 instead.

So it is PL8 that is open, which must be the red lamp. When I am tuned off signal, the dial pointer is illuminated. It stays illuminated in this color (it looks reddish in the photo but is actually a light amber) no matter which position the function switch is in - AM, Phono, Tape, Aux - and FM when it is not tuned to a stereo signal.

[Image: http://www.philcoradio.com/images/phorum/STA225_015.jpg]

But as soon as it is tuned into an FM Stereo signal...

[Image: http://www.philcoradio.com/images/phorum/STA225_016.jpg]

...the pointer goes dark.

I'll have to find a couple 3mm grain of wheat bulbs...6 volt, 60 mA. That is unless I want to convert these to LED. But given the circuitry that switches these bulbs to and from being an FM Stereo indicator...perhaps I should just keep it simple and stick with incandescent. I can, and likely will, install LEDs in place of the other lamps.