Larkspur radio system

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Larkspur was the name of a radio system used by the British Army. It was developed in the 1950s, introduced in the 1960s and replaced by Clansman in the late-1970s. The Larkspur range originally comprised the vehicle VHF sets C42, C45, B45, B47, B48, the A13 HF manpack transceiver and the C13 vehicle HF transceiver, all of which were designed by the government Signals Research and Development Establishment (SRDE) at Christchurch. VHF manpack sets of the era were derived from established designs with the A41 and A42 being copied from the US AN/PRC 8, 9 & 10, and the A40 from the Canadian C/PRC26. Various other sets such as the B70 UHF carrier telephony relay, C11/R210 HF transmitter/receiver for Royal Signals use, and the transmitter D11 and its associated receiver, the R230 were commercial developments adopted by the British services. All such sets of the era became known under the generic name of Larkspur.