QUESTIONS AND ANSWERS

Radio Record, Volume IX, Issue 13, 4 October 1935, Page 49

QUESTIONS AND ANSWERS

4 "MAGLHT TWO" (Feilding) : The high impedance audio choke you have on hand would be quite suitable to use in the "Haglet Two." The capacity of the tuning, condenser you have on hand is .00035 mfd. H.C. (Awakino): What is the Pierce ¢ earth system, and how is it installed? . A.: The system and the method of installing it are illustrated in the accompanying diagram. It was first developed by an American dxer, after whom the sys-

tem jg named. Outside the window, the lead from the set joins a terminal, front which twelve wires lead to a similar number of pipes driven into the ground. A leaky motor-car radiator is sunk in the ground at the end of the row of pipes with the cap-just above the surface of the earth, so that water can be poured into it periodically. The earth Jeads ghould be well ‘soldered to the tops of the pipes. vs "[GNORANT" (Riverton): To attach headphones to your set, connect one side of a .05 mfd. fixed condenser to the plate of each of the pushpull 59’s. The phones-connect between the two free pigtails on the condensers. To silence. the speaker when the phones are being used, fit a switch in one of the leads from the secondary of the speaker input trans- . former to the yoice coil, " Y." (Otago) : You should obtain ex"cellent results by using a shortwave conyerter in conjunction with your receiver,

ae Al" (Taihape): Lodge a complaint with your district Radio Inspector, who will investigate the trouble for.you. " A YON" (Christchurch) : Your queries — were answered in last week’s ‘Radio Record." " ONDERING" (Waipukurau): If you can pick up one or two American stations at fair speaker volume on the broadcast band,. then .your t.~.f. receiver should give satisfactory results with a shortwave converter. If it is not power-

ful enough to do this, then a solution to the problem would be to build an 1.F. amplifier into the converter itself. A ‘uneddoublet aerial such as that described in the 1935 "Radio Constructor’s Guide" should prove signal strength on the short waves appreciably. . "NOVICE" (Oamaru): Hither of the two shortwave converters described in the May issue of the "N.Z. Radio Times" would work admirably with your receiver. . Neither of them is difficult to build, though if you are doubtful of your capabilities in this direction, both models can be obtained ready assembled, tested and mounted in cabinets. ‘The price for the built-up Dxelrad kit is £5/5/-. and for the Lekmek kit, £6/6/-:.