As many hobbyists like to experiment with wireless devices, having a good 433.92Mhz transmitter is necessary to optimize the reliability of their systems and their range. While these modules can be finicky to use for data link purposes (and I won't go into that), they are quite simple for replicating remote control signals to control wireless switches, etc. To improve range and reliability, users often recommend buying a particular sort of module or increasing the input voltage I wanted to find out whether such strategies were effective and whether any of the low-cost modules were significantly better than the others so I decided to use the Tektronix  RSA306RSA306 I received in a RoadTest along with a probe lead from the PicoScope 2205A also from a RoadTest to investigate

 

The results are published here: http://goughlui.com/2016/05/01/shootout-four-433-92mhz-askook-transmitter-modules-compared/