Mobile Wireless Stations

Radio Record, Volume IV, Issue 26, 9 January 1931, Page 11

Mobile Wireless Stations

For Service in Egypt TRIO of interesting vehicles has recently been commissioned for a special form of service in Wgypt.. In reality the machines are mobile wireless stations and they comprise 30cwt. six-wheel chassis carrying specially constructed bodies in which up-to-date wireless equipment is installed. The vehicles will be used in areas which are not supplied by the land telegraph and telephone system, so that practically any point in a wide range of coun-' try on each side of the River Nile can be linked up with the main telegraph system. The Egyptian State Telegraph Department decided upon the use of Sixwheelers so that the mobility of the outfits is not affected, whether the machines be required to operate on hard or soft desert land. Bach vehicle carries a medium-wave $-kilowatt telegraph transmitter and a small portable short-wave transmitter of 100 watts power. The aerial is suspended from 70ft. masts, which are made in sections normally carried on the roof of the body. The wavelengths employed are between 600 metres and 2150 metres on the medium-wave set and from 20 metres to 50 metres on the short-wave set. A compact power-generating unit is carried, and can be removed from the’ interior by sliding it along a runway. After use it can be re-housed by employing the winch gearing which forms part of the equipment. The body of each vehicle has been specially constructed so that it can work under high temperatures, double sides and roof sections cf teak being used. the intervening spaces serving to help in keeping the interior cool. Egypt is a country in which, apart from the Delta, the towns and cities with their connecting railway and telegraph communications lie along a narrow strip of land bordering the Nile, with large areas of sparsely inhabited and desert country on each side. In these circumstances the mobile wireless stations should prove of particular value in providing special extensions of the existing telegraph facilities, either as a regular service or in times of emergency.