Shortwave Crystal Set - BFO!
That Shortwave Crystal Set can do more than AM. Let's give it a Beat Frequency Oscillator (BFO) and turn it into a direct conversion receiver that can demodulate Code (CW), Single Sideband and even Digital signals.
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Shortwave Crystal Set - BFO! Part 2
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Help for the BFO-LESS
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Crystal Sets - Admittedly Biased
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EEVblog 1752 - Texas Instruments SCREWED UP the NE5532!
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Build a 27MHz AM Modulator with a Dual Gate MOSFET
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Shortwave Crystal Set!
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What Happened to Shortwave Radios? The Truth is Brutal.
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What can you hear on a VHF 'crystal set'?
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Crystal Radio--Hi Q Hoop Coil-Copper vs Litz (4K)
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Single Sideband (SSB): How does it do that? (036)
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Crystal Radios: No Batteries? No Problem!
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The Fascinating Story of Tektronix, The Oregon Engineers Who Reinvented The Oscilloscope
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The Professor Who Taught People How To Think (1962)
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The Heathkit VF-1 Variable Frequency Oscillator (VFO).
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Spare The Rod? Spoil the Crystal Set - Part 1
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Easy way to convert AM radio to shortwave with BFO!
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Inside a Secret 1940s WWII Agent Radio: The Lagercrantz Suitcase
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Choking on Radio Projects?
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Collins ART-13 and BC-348 CW QSO
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