This guide we will going extend / amplify the 433 MHz radio signal with MAX263AXT. However, HC-12 alone already reach to 2KM (2000 meter in open range ) so perhaps we can extend it more with the help of MAX263AXT LNA. The
Wiring H34A / H3V3F / H3V4F 315/433 MHz RF Radio TX/RX
This is the H3V4F a module that tuned out of the box at 433 MHz RF popular in most remote switching. however there are 3 versions of H3VXX Module the 315Mhz and 433Mhz frequency, this devices has a Bandwidth of