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Telephone Set D.Mk V Field Phone RED

The Telephone Set D Mk V was a portable instrument for field use in Army formations forward of divisional headquarters. It provided the following facilities: 1) Calls by buzzer 2) Responds by bell to magneto generator calling and by aural indication to buzzer calling 3) Speech communication 4) Morse communication by buzzer and key The instrument, having a magneto bell, could only be rung by another telephone, or telephone exchange, which has a magneto generator. It could only call by buzzer, which gives visual indication to Switchboards UC (Universal Call), and aural indication to another telephone when not working through an exchange. Maximum range was 14-16 miles (speech) and 25 miles (Morse) using D8 twisted cable or 8-10 miles (speech) and 15 miles (Morse) using D3 cable. Like the F Set, it was powered by two 1.5V ā€˜Xā€™ or ā€˜Sā€™ Cells. In addition to the normal handset, the set also incorporated a single headphone, which could be used on a listening watch. The Telephone Set D Mk V* was similar but without the headphone. In army slang, the set was commonly known as a "Don Five".
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