Don't miss out on these great originals! Now combined as one book, the original 12 issues still hold their own. They include a complete set of plans for a "Modern Day Crystal Set". Why did the sets of the 1920's work anyway? Crystal sets and wirelesses, 1905-1928. Matching your antenna and set for maximum signal reception. The Lead Pencil Detector. Detector biasing for improved sensitivity. Double-tuned circuit crystal sets. The Universal Crystal Set. FM Crystal sets? The electrolytic detector. The coherer revisited. The Miller '595' Tuner.