[Winky Dink]

Starting from zero knowledge I started working on a 1950 Motorola TV with a Sams Photofact folder.  That's how I learned to read a schematic, so I'm comfortable with it.  Rider schematics are just as good for me, but I can't make heads or tails of a modern schematic.

I tried boosting the first cap by paralleling a 10uF cap, but that didn't help.  As I said above, I really don't know what might cause this particular hum.  If you have 25 seconds to spare, you can listen to the hum here:

https://picasaweb.google.com/lh/photo/8a...directlink