Baofeng UV-5R Mini

The Baofeng UV-5R Mini handheld radio is a popular and affordable dual-band amateur radio transceiver widely used by beginners and experienced ham radio operators. Designed as a compact version of the original UV-5R, this small and lightweight VHF/UHF walkie talkie offers solid performance for everyday communication, making it a common choice for those getting started in amateur radio (ham radio).

The UV-5R Mini operates on both VHF (136–174 MHz) and UHF (400–520 MHz) frequencies, supporting communication on the 2 metre and 70 centimetre amateur bands. With a typical output power of around 5 watts, it is suitable for short to medium range communication, including simplex operation and repeater use. Many versions include features such as CTCSS and DCS tones, allowing access to repeaters and private channel setups.

This compact handheld radio includes a range of useful functions, such as 128 memory channels, a built-in FM broadcast radio receiver, VOX hands-free operation, and a small LED flashlight. Some newer UV-5R Mini models also support USB-C charging and Bluetooth programming, making them easier to configure using smartphone apps or software like CHIRP programming software on a computer.

Compared to the standard UV-5R, the Mini version is more portable and pocket-friendly, though it often comes with a smaller battery and display. Despite the reduced size, the RF performance is generally similar, making it a convenient option for portable use, hiking, or as a backup two-way radio.

The Baofeng UV-5R Mini is known for being a budget-friendly handheld transceiver, which is one of its biggest advantages. It provides access to amateur radio communication, repeater networks, and frequency scanning at a very low cost.

In Australia, the UV-5R Mini can be used legally for listening to radio frequencies, but transmitting requires an amateur radio licence issued by the ACMA. It is important to note that this radio is not approved for UHF CB (477 MHz) or commercial radio use, which are governed by different regulations.

In real-world use, the Baofeng UV-5R Mini typically achieves a range of 1 to 3 kilometres in urban environments, and up to 5 to 10 kilometres or more when using repeaters or operating from elevated locations. Performance can be significantly improved by upgrading to a better antenna or connecting the radio to an external base antenna.

Overall, the Baofeng UV-5R Mini dual-band handheld radio is a great entry-level option for those interested in ham radio communication, repeater operation, and portable VHF/UHF use. It is especially useful as a backup radio or learning tool.

Please comment if you have any thoughts.

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Olivia Digital Mode MFSK

Yes, this popular girl name is actually an Amateur Radio term.

Christian, DK8EW, put me onto Olivia after we chatted on VARA HF. I had heard about Olivia before, but he encouraged me to give it ago.

Soon I made contact with VK4XP and must say it is a great digital format, though I understand a lot feel voice to voice is better (as I do). That said, this digital mode doesn’t require as much bandwidth, so has the potential to go further. The typical Olivia signal can still be decoded when the amplitude of the noise is over ten times that of the Olivia signal which is amazing.

Olivia is part of the family of MFSK modes and has a high redundancy Forward Error Correction system similar to MT63. The MFSK family is very large with many modes, so it can make it very difficult to work out which is which when you hear it. Olivia works really well on poor HF paths.

Olivia digital modes are commonly referred to by the number of tones and the bandwidth, in Hertz, used. Therefore, it is common to express the Olivia digital mode as Olivia X/Y (or Olivia Y/X ), where X refers to the number of different audio tones transmitted and Y refers to the bandwidth in hertz over which these signals are spread. Examples of common Olivia modes are 8/250 (meaning, 8 tones/250-Hertz bandwidth), 16/500, and, 32/1000. There are three popular Olivia modes, which is 8-FSK, 16-FSK and 32-FSK, that have three, four or five bits per symbol.

Olivia QSO Formats

Format Bandwidth / TonesAudio Centre Marker (Hz)BaudDecode S/N Radio (dB)Speed WPM
500/16*75031.25-1319.5
1000/32*100031.25-1224.4
500/875062.5-1129.3
1000/16100062.5-1039.1
500/4750125-1039.1
250/862531.25-1414.6
* Is the most common Olivia format in use currently

Here is a video that will give you more information:

While Olivia could acutally be used anywhere in the data allocated area on HF, however you may not find anyone if you are not on the right frequency. Below is the suggested calling frequencies used around the world:

I’ve typed to many people around the world on this mode and surprised how well it works when conditions are not great. The software tells you if there is another conversation on the band also which is handy.

There are a few protocols, like using BTU (back to you) on your last line and some shortcut typing which isn’t the same as the youth of today use in text messages!

While I still prefer voice contacts with people, at least this option is a conversation and something different when conditions are not favourable.

What are your thoughts on this mode? Have you tried it? Have you had success? What radio and band did you try?


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