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CHIRP is a free, open-source, cross-platform radio programming tool supporting a large number of transceivers from manufacturers like Icom, Kenwood, Yaesu, Alinco, Wouxun, Puxing, and Baofeng. It operates on Windows, Linux, and macOS, allowing users to exchange data between different radio models and interface with multiple data sources and formats. The software facilitates the management of memory channels, frequencies, and various radio settings, streamlining the configuration process for amateur radio operators. The tool supports a comprehensive list of specific models, including the _Icom IC-7300_, _Kenwood TH-D74_, and _Yaesu FT-818_, among many others. It also provides compatibility with various file formats such as Generic CSV, RT Systems CSV, ARRL Travel Plus (.tpe), and manufacturer-specific formats like Kenwood KPG-44D (.dat) and Icom Data Files (.icf). Additionally, CHIRP can integrate with the DMR-MARC Database for enhanced programming capabilities. Users can download CHIRP for their specific platform and access extensive documentation, including a FAQ and a mailing list for support. The project encourages users to report issues by consulting existing documentation and open/closed tickets before submitting new bug reports or feature requests.

UV-5R models comparison chart

A project to build a cross band repeater using a pair of Baofeng UV5R handheld transceivers.

Baofeng UV-5R extreme Receive Modification

Nice feature of the Baofeng UV5R family is that they support 6.25kHz tuning steps. That fact makes it possible to dial in the radio to use the exact PMR446 channel frequencies rather than a nearest fit which is the case in many other transceivers.

Remotely-Operated 1200 Baud AX.25 Narrowband Packet Radio and APRS on a Baofeng UV-5RA and Raspberry Pi 2

BaoFeng UV-5RA, UV-B5, UV-82, and Yaesu VX-6R Comparison

Programming memories manually the Baofeng UV-5R

Baofeng UV-5R uses RS232 to communicate or programming with the PC software and you can make your own programming cable with a few components.

Baofeng UV-5R dual band handheld transceiver, features, pictures, movies, links and manual.

Original User Manual for the Baofeng UV5R

Barest of bones APRS RF position reporter using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and the radio

The Baofeng UV-5R handheld transceiver, introduced around 2012, operates across the 2-meter (144-148 MHz) and 70-centimeter (420-450 MHz) amateur bands, offering dual-band receive and transmit capabilities. This review provides an early assessment of the radio's form factor, user interface, and general performance, noting its compact size and the inclusion of a **VFO/Memory mode** button for frequency management. The device supports both FM and narrow FM modes, with a reported power output of 4 watts on VHF and 3 watts on UHF, making it suitable for local simplex and repeater operations. Key features discussed include its 128-channel memory capacity, a built-in VOX function, and a **DTMF keypad** for tone dialing and repeater access. The review highlights the radio's ability to scan frequencies and memories, along with a dual-watch function allowing simultaneous monitoring of two frequencies. Battery life is addressed, with the standard 1800 mAh Li-ion pack providing several hours of operation depending on transmit usage. Initial impressions cover the radio's construction and the clarity of its LCD display, which shows both A and B band frequencies.

A review of the baofeng dualband handheld transceiver

What are the Differences between UV5R and UV82 Series

Super Simple APRS Position Reporter. This project idea has been in response to the more hardware heavy Raspberry Pi projects that involve extra TNC hardware, additional sound cards, and custom cabling. This APRS position reporter is done using a Raspberry Pi B+, USB GPS receiver, Baofeng UV-5R, and a mono 3.5mm audio cable between the Pi and HT.

Notes for new hams using the Baofeng UV-5R3, Basic Ham Procedures, open repeaters, Local Ham Nets.

A tiny board, which allows a smartphone or similiar device to connect to the Baofeng UV5R radio via a TRRS audio connector. It allows for connecting the radio to a software TNC app such as APRSDroid or PocketPacket. Solder on the components, solder on the cables, then provide some stress relief, (I use solid-core wire and heat shrink tubing), and you can use your UV5R with your smartphone for APRS on the cheap.

Programming the Wouxun KG-UV3D and the Baofeng UV-5R+, getting your computer to recognize the programming cable, installing the Wouxun software and hints on how to program Baofeng radio UV-5R.

This blog post documents the author's journey building an APRS micromodem for amateur radio applications. Using an open-source design by LY2EN, the author assembled a cost-effective Terminal Node Controller (TNC) with SMD components, an Arduino Nano, and a JDY-31 Bluetooth module. The construction process included PCB fabrication, careful component soldering, microcontroller programming, and Bluetooth configuration. A custom 3D-printed case protected the completed device. Field testing in Romania showed the device functioned with a Baofeng UV-5R radio, though antenna limitations affected performance. The entire project demonstrates an affordable DIY alternative to commercial APRS trackers.

Fix the no-mic problem with the Baofeng UV5R+. It may happen the carrier wave is there, but there is no modulation.