[Patrick]

What's happening here? The 6 meg tone control (51) is switched. That's why the dotted line. But the wiper can't be grounded, or the .01 cap, 40a, would just be shorted to ground. Why does the wiper have a circle for connection, instead of a dot? It appears the actual pot has nothing connector to the wiper.  How does this tone control work?

I'm confused.

[Image: https://i.imgur.com/e9jYt0n.jpg]