OddMix.com - Technical Note - Crystal Radio - TN041205 - Karl Nagy
|Picture 1. The "Latest in Crystal Detectors" from the early 1920s. This article originally appeared in Page 612 in the May issue of the Radio Amateur News monthly published in 1920|
|Picture 2. This Bunnel JOVE Crystal Detector ad is from Page 656 in the May issue of the Radio Amateur News monthly published in 1920||Picture 3. This Crystal Receiver ad is from Page 659 in the May issue of the Radio Amateur News monthly published in 1920|
On Picture 4 is from the "A Simple Two Element Fleming Valve Circuit" from the "I want to Know" Department for the Radio Experimenter. This picture article originally appeared in Page 640 in the May issue of the Radio Amateur News monthly published in 1920.
This "I want to Know" beginners department has two full pages of useful and informative mini articles like this one about about "Rectifying Bulb Circuit", "Use of Same Detector and Amplifier Batteries", "Small Efficient Transmitters", "Types of Honey-Comb Coils". "The Almost Obsolete Fleming Valve" and the like - so many useful, fun to read little historical gems.
|The Radio Amateur News May 1920 entire issue is available as a good quality - 300 dpi - PDF file|
e-mailed for $10 or mailed for $12 on CD Click here to order