 The transmitter and receiver were comparatively light in weight and were subsequently modified to provide the electronics for Australia's principal air warning radar the LW/AW MkI and MkII.The radar equipment was manufactured in Sydney by HMV (His Master's Voice) also known as The Gramophone Company.By the time the British ACO (Advanced Chain Overseas) radar system was installed at Bones Knob in September 1943, features of its design had already been superseded by the Australian LW/AW radar, especially its conspicuous twin towers.