Size is approx 6” x 3” x 3” including Knobs There are no cracks chips, or scratches in the gloss Bakelite case. Examples are the Tuggle and the Lionodyne circuits. The modern Crystal Radios built by competitive DX gurus use the same dual tuning technique. Modern day copycats have tried to match its performance by X-Raying the tuning coil to determine the size and placement of the ferrite slug inside the coil. 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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