In case of RF-11 prototype, marked as RC-473, the Kbely designers were inspired by German K1.Fu.Spr.d. It included a six-valve double detection receiver (superheat), similar to American Handie-Talkie (BC-611). Series version of RF-11M enabled communication with the tank U.H.V. extension in a form of RM-31-50 radio station. Miroslav Petr, M.Sc. (Tech.) was at the birth of RF-11. The RF-11 radio station was used at the development of Orlík waterworks where it served for communication with crane operator at concreting. Later on, it was delivered to civilian sector using commercial name – Orlík.