I probably should've mentioned first time around that the solar
calculator I have is close to 30 years old (but up until switching out the old light
fixture bulbs for LEDs, it's worked like a champ). I tried it again today indoors under the LEDs, then outdoors in the sun. It worked outdoors, but not indoors.
Also, the radio I was trying to listen to is about 6 mos. old, & I had it tuned to an FM station (NPR). I didn't try AM.
Boy, there sure are a lot of well-versed folks on this forum. I've learned a lot; now if only I can remember it all for longer than a couple days. Thanks!