Look for U301....
You want U301 a MC3371D and pin 9 is the base audio out.
The chip is the one on the top of the bottom board (the one with a hole), by the only tuning slug on that board.
Remember to remove the silver screw that connects the 2 boards and unsolder all the tabs and straighten them out on the board with the hole.
Good Luck...
Ray
KE6JPV
