There are PTT switches available that attach to the controls with velcro.
The wiring runs externally.

"Henning DE" wrote in message
...
Hello Cessna owners !

I want to add PTT-Switches to the controls of a 1977 172N.
Since the control horns are not hollow i don`t know how.

Any suggestions ?

Henning Dammann-Emden
Bremen/Germany