The key to its performance is its dual tuning and the ferrite core coupling between the antenna tuner and the detector tuner. The CR-1 is arguably the best performing commercially sold Crystal Radio sets of all time. Very Hard To Find These Days Here is a mid 1950’s Heathkit Model CR-1 Crystal Radio Set. Another item you can’t do without is coming soon. I list items for sale on eBay several times a week. I am constantly digging around at estate sales, attics, auctions, flea markets, and swap meets. ![]() If you collect or restore old radios, crystal sets, early scientific apparatus, vintage test equipment, military surplus, or other unique old technical items, keep me on your watch list.
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