The Wireless Set No. 38 was a High frequency (HF) portable man-pack radio transceiver used by the British Army during World War II. Designed by Murphy Radio, it was a five-valve set covering 7.4 to 9 MHz and powered by a large dry cell battery carried in a separate haversack.^[1] An armoured fighting vehicle variant was also developed for use alongside the Wireless Set No. 19 in armoured vehicles to allow direct communication between tank commanders and infantry.^[2] In 1945, a Mk. III version was produced housed in a sealed diecast metal enclosure.^[3]