The Science of PMR446 / FRS / GMRS Range: How Far Do They Really Go? (Retevis RB639)

Unlocking the secrets of walkie talkie and HT range testing with my latest video. Discover why these devices are mosttly reliable at under 500 metres, and how factors like a clear line of sight as well as elevation (say on a hilltop) can increase or degrade performance. Join us as we examine the science behind walkie talkie antenna gain, and see some real-time software modeling of range on a real map.

Featuring (Retevis RB639) - here's Fred's video:    • Retevis RB639 PMR 446MHz 16 channel 2...  

Experience tells us that walkie talkies are mostly reliable at around 500 metres. However, sometimes you can get a greater range, for instance if you are in the clear or on top of a hill. We look at why this is, the software used to check the gain and we can even model the range over a live map. Tune in to understand.

The supplier tells me there is a deal here.. Here they are:
2 Pcs: https://www.amazon.co.uk/dp/B0BDR5XG6...
4 Pcs: https://www.amazon.co.uk/dp/B0BDR7B4C...
10 Pcs: https://www.amazon.co.uk/dp/B0BDR8HQS...

More videos:
▶️    • Antenna Modelling   Antenna Modelling
▶️    • Tips and Tricks   Tips and Tricks
▶️    • Antennas   Antennas
▶️    • Live Streams   Live Streams
▶️    • Commander World   My Stuff
▶️    • Foundation Training   Ham Radio Training