Why Do VHF Band Radios Work Best Outdoors?

As we all know, the VHF band radios mainly use FM channels in the VHF (Very High Frequency) range between 156 and 174 MHz. And they are generally considered to work better outdoors than UHF.

The Benefits of VHF Band Radios

1.More Bandwidth: Higher frequencies provide more bandwidth; you could send far more data in less time with a VHF antenna than a lower frequency antenna.

2.Fewer Interference: There are fewer devices working in this range, so they don’t suffer as much interference in general. And it is less subject to interference from background radiation such as an electrical system interfering with a wireless phone’s reception.

VHF frequencies can penetrate objects better than UHF. VHF can also travel farther. If a VHF wave and a UHF wave were transmitted over an area without barriers, the VHF wave would travel almost twice as far. UHF signals don’t travel quite as far outdoors as VHF signals, but they do a better job of penetrating wood, steel, and concrete. Thus, VHF radios are better for outdoor use in large areas, and UHF radios are better for indoor or outdoor settings that are in close proximity.

Get Acquainted with RT81V

RT81V is a Dual Time Slot DMR Walkie Talkie with VHF band, 136-174Mhz. It can supply long range and privacy communications for outdoor environments. RT81V has two modes of digital and analog, 2 zones, 32 channels, It is compatible with the popular MOTO TRBO series Tier I, Tier II. It can offer clear and digital voice communication. RT81V is Out of the box; It works with analog and dmr walkie talkies directly. It can communicate with other walkie talkies by setting the frequency and CTCSS/DCS codes through computer software. We offer the free software to program.

RT81V VHF Band Radios
RT81V VHF Band Radios

IP67 Waterproof

RT81V went through the strict waterproof and dustproof test. It is IP67 waterproof and Dustproof. It can be put in one meter of water for 30 minutes, keeping inside and outside intact. Here I prepared a short video to show it is waterproof.

Variable Communication Ways

With single call, group call, and multiple call modes, RT81V adapt to complex and variable communication environment. Each radio has an ID, which can call a designated person, or can be freely grouped to enable members of the group to talk.

Long Standby Time

With 2200mAh battery, RT81V supports long-time operation, more than 12 hours in analog mode; and more than 20 hours in digital mode.

High Power & Long Range

What’s more important is the high power and VHF band frequency allows the strong penetration. In the city, it can cover 1-3km, while 2-5 km in villages and 2-8km in the open area with few obstacles. The above are just data for reference. The call distance will be affected by the actual terrain and obstructions.

Thank you for reading this blog! If you have any questions, please leave your comments below. We are looking forward to your comments!

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