Eachine 25mW 5.8GHz Video Transmitter: Bench Review & Range Test

I was curious how far I can get with my cheap Eachine 25mw 5.8ghz VTX (), using different types of antennas. We test this using cheap rubber ducky antennas, ImmersionRC SpiroNets and Birds Eye View Dome and Pulsar antennas ().
In the video we use a small testbed and walk away as far as possible from the VTX while still having a flyable picture. The distance using a smartphone app based on GPS. This is an unscientific test and possible also not highly accurate, since 1) I’m moving on the ground and 2) There is no interference (like from ESCs, motors, etc.) close to the VTX. But my aim here is to just get an idea of the range. So take this with a grain of salt please.
For the comparison, please note these types of antennas are very different. The rubberduckies are omnidirectional and cheap. The spironets are omnidirectional and of a higher quality. The antennas from Birds Eye View are omnidirectional (Dome) and directional (Pulsar). So this is not an antenna comparison, which would be unfair because the types of antennas differ. I’m just trying to get a first idea of how far one can realistically get with that video transmitter.
Results:
Rubber Ducky: 354m (1162 feet)
ImmersionRC SpiroNets: 500m (1641 feet)
Birds Eye View Pulsar & Dome: 601.8m (1975 feet)
The Dome and Pulsar antennas from Birds Eye View are available at:
Here are the specific product links for the antennas used in this video:
Birds Eye View Dome: (RHCP), (LHCP)
Birds Eye View Pulsar: (RHCP), (LHCP)
The Eachine ET25 VTX is available from:
The Android app used for doing the measurements is called "GPS Tape Measure" and is available here: