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Show I SWITCH CHANGES RECEIVING METHODS I By R. L. Dl'XC AN. Director. Radio Institute of Ami ri a If you have passed from the crystal detector staffe to that of the vacuum tube, do not throw your old set int" the discard. It may be used with the larger set in one - lr mi' By uso of a double-pole, double throw switch, you will bi ble to shift from one set to the ah. i -.iviru; the old crystal detector for nearby broadcasting broad-casting and the vacuum tube for more distant reception. Hook up according to the diagram . No. 1 Loose coupler or varlocoup- 4mtT1 GSre L- J ler with 'A" representing the primary pri-mary ami "B" the sorondary. No. 2 Variable condenser of about T 0005 microfarads shunted acioss the secondary. No 3 Crystal detector, catena preferably. pre-ferably. No I Small fixed enn'tn-' No '. - Head phones of hlph resist. re-sist. nice. No fi I ouble-pol-. do'jbh -1 brow switch for changing from the crystal to the vacuum det. c ior or vice-versa. No. T Grid leak and grid condenser. con-denser. No. 8 Detector tube No. 9. Filament rheostal No. lo Six-volt "A" battery. No 11 A 22 l-2-voit "BV battery. |