Variometer Crystal Set.
PETONE reader who constructed the variometesc ‘erystal set, described some time ago, states that with a one-valve amplifier he has received all. New Zealand stations and four Aus: tralian, though. reception is accompanied by fading. Considering that an ordinary clothes-line is being used as an-aerial, this is good work. As stated in the article, the variometer is not selective, and was intended for local reception only, and this listener states that on some occasions he has: heard several stations at the same time. The "R.R. Selective’ is the-best crystal circuit for long distance,- «--
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https://paperspast.natlib.govt.nz/periodicals/RADREC19280831.2.68
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Radio Record, Volume II, Issue 7, 31 August 1928, Page 28
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96Variometer Crystal Set. Radio Record, Volume II, Issue 7, 31 August 1928, Page 28
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