TELEPHONY FROM SCOW.
JUST OFF BROADCAST BAND. The first vessel on the New Zealand' coast- to be fitted with a wireless telephony apparatus is the auxiliary scow Echo, which trades between Blenheim and Wellington. The vessel has been allotted the call-sign ZM.TD and her transmitter has a, daylight range of about 100 miles. It uses three valves—oscillator, modulator, and speech amplifier-—and current is derived from the ship's lighting set, which operates a dyna-motor supplying plate current at 500 volts. The output is 40 watts and the wave-length used is 198 metres or 1515 kilocycles. This is just off the broadcast band, so that the Echo can be beard talking by most listeners-in. The other vessels of Messrs. Eckford and Co.'s fleet are to be similarly equipped. The firm has the distinction of having introduced the first full motorship to New Zealand waters, and is now pioneering t'he way with the first ships fitted with , telephony. The equipment makes provis>ion for the emergency use of Morse code signals on the continuous wave system.
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New Zealand Herald, Volume LXVIII, Issue 20962, 27 August 1931, Page 3
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172TELEPHONY FROM SCOW. New Zealand Herald, Volume LXVIII, Issue 20962, 27 August 1931, Page 3
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