Radcord Crystal Set

Radio Record, Volume V, Issue 25, 31 December 1931, Page 15

Radcord Crystal Set

Constructor’s Results "(\URIEUX" (Napier) writes: I have built the "Radcord" erystal set into a copper cabinet, and have had good results. Each evening 2YA, Wellington, comes in softly but clearly enough to recognise tunes, The list. of stations heard numbers six, the five others being: 2ZH, Napier, 100 watts; 2ZB, Napier, 7 watts, a harmonic of short-wave amateur station; ZL2FG, Napier; and 2ZI and 2ZL, Hastings. The two latter are about 11 miles distant by air, and have a power of somewhere between 12 and 14 watts. My aerial is 40 feet high at the far end and about 22 feet at the lead-in end, the main span being about 30 feet, and the earth consists of 3 5-foot pipes driven into the ground six feet apart. The detector is a home-made one, fitted into the empty casing of an old semi-permanent detector. In the cup portion is fitted a piece of treated galena type crystal, and set in the head of the plunger rod is a sharp piece of metallic arsenic. I have had 2YA using crystal and catswhisker, but not quite as well as when using the above detector. ,