Review on High Gain 7dBi Omnidirectional Antenna with SMA Connector and Internal Thread Needle for 433MHz Frequency Range (430-436MHz) by John Shorter

I ordered two of these antennas and tested them with the Comet CAA-500 Mk2 Antenna Analyzer. in the range of 433-435 MHz (not great, not terrible). I have a much better SWR of 1.1-1.2 (lower SWR and closer to 1.0 the better) on 423MHz. The second tested had SWR between 2.3-2.5 in the 433-435 MHz range (you wouldn't want to use it). The maximum SWR I was able to get was around 1.5 over the entire 407MHz frequency. I noticed that one antenna is physically a few millimeters longer than the other, which could explain the difference in readings. I would conclude that there are some quality control issues that need to be addressed as both antennas seem to be oscillating at frequencies outside of their specs (423 and 407MHz instead of 433MHz). Otherwise, the visibility of the antennas will be of high quality. and aesthetically pleasing. I can order two more and see if I can get results closer (or better) to the first one I tested.