Further experiments with SA818 transceiver modules - SVXLink simplex node
Sa818 Board Resources - EasyEDA
Hugo on Twitter: "@f4goh No luck. The RF module (SA818, replacement of DRA818) seems dead. Nothing on its uart TX port and nothing on its RF output although it is correctly stimulated
Walkie Talkie Module SA818S And SA818: Differences|NiceRF : u/G-NiceRF
Demo for SA818 Walkie Talkie Module from NiceRF on Tindie