Perth Police Use Wireless

Radio Record, Volume IV, Issue 19, 21 November 1930, Page 6

Perth Police Use Wireless

TA FTPR some months of preliminary work, the Perth Police Wireless Patrol Service is now in operation, and Perth, by utilising this modern aid in the prevention of crime and preservation of law and order, takes its place among the most up-to-date cities of the world. In the wireless office is a receiver of most modern design, which picks up signals from the cars. There is also a monitor receiver by means of which, via a loudspeaker, the operator hears his own signals to the car going out as he keys. The actual transmitter has a nominal rating of two kilowatts, giving any efficient range required by the police authorities under all reasonable operating conditions. It is of the latest type, and full provision has been made for emergency or contingency working. The cars are said to be capable of doing up to 120 m.p.h. equipped with all the latest gadgets, including a special siren for "clear the line" trafic! Outwardly, there is little to distinguish the cars from other similar cars on the road; the aerial cannot be seen, and the transmitter and receiver can only be found by close inspection through the car windows. The power units are independent and separate from those of the car, and all apparatus is of the latest design and very compactly assembled. Very satisfactory results are obtained both from the car and the main transmitter-signals from the latter being of such intensity that, notwithstanding the very small aerial pick-up, no difficulty is experienced in reading signals with the earphones laid on the’ seat and the ear going "all out."