WIRELESS IN HAWERA.

Hawera & Normanby Star, Volume XLII, Issue XLII, 20 October 1922, Page 8

WIRELESS IN HAWERA.

-, $ MR, ROWSON'S SET. j s ' . 1 A Star reporter spent a most investing evening yesterday, when he ivas initiated into some of the wonders i >f wireless telegraphy and telephony by i Mr. L. Rowson, of Rowson's Western Electric. I To pick up messages from the Maheno and listen to a gramaphone in Stratford was something new for a Hawera resident, and gave him a very real idea of the great possibilities of the wireless which is making such rapid strides j Mr. Rowson is to be congratulated on his keenness and enterprise, and there is no doubt that the transmitting set which he is constructing will have great capabilities. _ ] The receiving apparatus was built by ; the Western Electric, on the Marconi ; hetrodyne principle, with one stage of , amplification in shunt with an audion frequency transformer. The tuning :oils were "designed by the builders, and in addition to the usual primary and secondary coils, a regenerative coil has been added, which considerably amplifies the sel. \ Condensers of .001 micro Farad capscity have been inserted in the primary and secondary circuits, making the set extremely sensitive to wave lengths up to 1000 metres. The valves are of the Marconi pattern, with a 24-volt plate pressure, and 6 volts on the filament, which is controlled by two separate rheostats in the primary circuits. The pane] is of santanayo, measuring 31t by 16in, and is supplied with current from two 24-volt batteries for the high tension, and one 6-volt for the low tension. The headphones are the Brown ' type, with a total resistance of 3000 ohms, and are inserted in series with the high tension battery, and the plate of the secondary tube. The aerial is built on the two-wire L type principle, with an overall length of 100 ft, and a total height of 45ft from the ground. This set is remarkably sensitive, enabling the American . and Australian stations to be heard with ease. It might be mentioned here that both telegraphy and telephony may be heard on this set with equal audibility; also that those who have sets capable of picking up the Wellington station (VLW). The night wireless signals are sent out as usual on Monday and Thursday evenings, Greenwich date; Tuesday and Friday. New Zealand date. The time signals begin at 21 hours OOM.OOS Greenwich mean time, and is repeated .at the first, second, fourth, and fifth minutes.