During its service life, the RT/UK PRC-320 Manpack HF Transceiver deployed wherever the British Army was sent. That likely ran from frozen wilderness to scorching desert. So the radio was built to handle extremes (as well as live underwater for a time; but that’s another video) with stable operating ranges from -37ºC to +52ºC. This video short pays homage to the upper range.
Another in my occasional series of adventures with my old, heavy and extremely capable military radio.