[morzh]

Speaking of that 89 cap. I am not sure I understand why they made it the way it is.

It has three caps inside: two 0.1uF in series, the centerpoint grounded, and the ends connected to a 0.8uF cap. The grounding is done through the lock and spring against the chassis. However instead of putting out just two wires they put three wires. Obviously the connection of one of the 0.1uF cap and 0.8uF one was not done inside, as two wires out of three were connected to the same pin of 490K resistor.

I connected everythiong inside, and only put out two wires connecting them to two of the 490k resistors.

Usually the reason for something like this is that the cap assembly could've been used in some other radio and the interconnect was different. But I don't know that.
Also spring-loaded Grounding is not my favorite way of doing it, I always opt for attaching it with an inclined plane wrapped helically around axis. But then that's me. The spring is a pretty stiff one, so I hope it will provide for good contact.

But if anyone knows the reason for that wire exuberance ikn that cap - I'd love to know.