[regel_1999]

I found out what the problem was with the high pitch hum. My Apple MacBook sitting next to the old RCA is causing some sort of interference. When I use the mousepad it causes it to squeak, same thing for any button functions of when the processor starts crunching!

I'd never have thought that except I noticed that when I adjusted the volume on my computer it caused a nearly identical sound simultaneously on the radio. Kinda neat... I'd never thought my computer was giving off enough interference to hear on AM bands... solution - move computer off table with radio... still no shortwave though