POLICE RADIO CALLS

Gisborne Herald, Volume LXXIV, Issue 22341, 28 May 1947, Page 6

POLICE RADIO CALLS

HEARD IN GISBORNE REBOUND FROM AMERICA Amateur radio enthusiasts in Gisborne stale that the message from New York printed in ye: tercisy's Gisborne Herald, to the effect that police messages broaden, t. b.v American police stations had been picked up in Melbourne, could have been sent out years ago. Many radio enthusiasts throughout New Zealand have heard these messages on ordinary radio sets, the main necessity being the patience of the listener The police stations broadcast to their cars only at intersais, and if the listener has the patience to mahitnin a watch on a certain irequency he will easily pick v.) messages. Gisborne radio men have found Ih.ri between 5 and 7 p.m many American police stations. particular’;, 7 these operating on the Pacific coast, can be heard. Most of the stations operate on a frequency of between 120 and Dill kilocycles, and can be tuned in at the lower end of Iho broadcast bands. Mnnv radios manufactured m ' mcrica have special police bands .narked cn the medium wave band of tho radio. it is generally considered that the broadcasts arc apparently 7 lhe Heavyside layer above the earth's atmosphere and bouncing back to ,lio other side of the globe. As ihe layer has a tendency to de-reare its altitude above the earth during the hours of darkness. better reception is obtained in lhe evening. As the police ears to whom uk messages arc transmitted l ave cnlv a low-powered transmitter installed, their reply to lhe main st-iii'ii iseldom if ever heard in tiffs country