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Radio Record, Volume I, Issue 4, 12 August 1927, Page 12

Iicre is a hint to Wellington crystalset owners:-A correspondent writes to an American journal:-‘I am using an aerial somewhere between 300 and 400 feet-alinost the length of the block I live in-but this is primarily to get loud-speaker volume ot: my "pure and simple" crystal set. Most of the time T listen to the locals on this crystal set, which brings them in about as loud as an ordinary two-tube combination with otie stage of audio amplification," For erystal sets, the longer the acrial the louder the reception,

In responSe to several requests we Shall publish at an esrly date full patticulars Of a f{Our-valve Browning-Drake receiver. This circuit, when properly constructed, should have very wide range of reception when conditions are favourable. The four-valve set has one radi0-ffequency amplifier, detector, and two transformer-coupl-> ed audio amplifiers. If the audio is resiStance-coupled, then three amplifiers wouJd be used and the total number of valves would be five. The tater types of L.F. transformer, however, leave little to be desired in the way of tone and volume when coupled to suitable power valyes,