Telegraph key for military radio stations R-131, R-129, R-143, Glet-N and the civil Angara. The key is not convenient in the adjustment. Some round nuts have to be completely removed from the key, since with them the key can not be adjusted. Instead of a nut, put several washers. Round nuts are not convenient to unscrew or fix. If the new telegraph key has been stored for a long time, then the nuts can sour, and twisting them without the help of pliers is very problematic. If the lid is closed to the end, then there is a possibility that it will touch the manipulator. Therefore, the lid does not close completely. On the key it is not convenient to work for novice telegraphists. There are many such telegraph keys on sale. The key is fixed on the radio station behind the plate from the bottom of the case.
Update: 20180510 author: