technical Archive

Blog posts about the activities of the RRRA Technical Committee and the equipment/systems they maintain. This archive also includes blog posts about technical topics of general interest.

Teardown Tuesday: Baofeng Amateur Radio

Inexpensive Chinese radios, such as those produced by Baofeng Technologies are popular as starter radios due to their low cost. They are also used as disposable or spare/back-up radios.

Learn about the internal architecture of the Baofeng UV-5RB in the Teardown Tuesday: Baofeng Amateur Radio Transceiver article on the All About Circuits website.

This article describes the disassembly process and includes a video of the tear down. It also includes circuit board photographs, a schematic diagram, block diagrams of the major components used in the radio, and links to data sheets for those major components.

Is Your Version of TQSL Up To Date?

“As of 1400 UTC on January 16, ARRL Logbook of The World (LoTW) no longer will accept contacts that have been digitally signed by versions of TQSL earlier than version 2.0. Users of earlier versions are encouraged to upgrade as soon as possible, as older TQSL versions contain uncorrected defects and display inaccurate error messages.”[ 1 ] TQSL for MacOS and Microsoft Windows may be installed from the LoTW Installing or Upgrading TQSL page.

BY70-1 Cubesat Launched

“BY70-1 is a 2U CubeSat project for education and Amateur Radio. It features 3-axis stabilization and deployable solar panels. In addition to the FM transponder, BY70-1 has a camera, and plans call for downloading images and telemetry via a 9600 bps BPSK downlink. The IARU Amateur Satellite Frequency Coordination pages list an uplink of 145.920 MHz, and a downlink of 436.200 MHz.”[ 1 ]