OH!! I wanted the bottom row of the table.
Wow 65 IS super hot.
Hmmmm. I don’t want to work with those kind of temps 
.
If I chose to work with 9V instead.
0.1 * (9-5) * 50 = 20.
That’s much better.
The 5V from my LM7805 will be riding to this makerverse mono amp.
I pulled this graph from the mono amplifier’s datasheet.
So it looks like I should expect draw anywhere form 50 to 300ma.
That would mean the L7805 can go from 10-60 degrees above room at 9V.
Did I get my math right?
Maybe I should use a small heat sink to be safe?
