Inside the 22A2 Repeater.
The gain is adjusted under the cover on the right. The course adjustment is made by changing jumpers on the round resistance units and the fine adjustment by adjusting the potentiometers. (These are the two cylindrical objects with the slotted brass shafts.) There is one set of adjustments for each direction of transmission.
This is the back of the repeater.
Revised 11/15/03