This VHF superregen receiver worked first time!
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Hear 27 & 28 MHz action with just 2 transistors
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What can you hear on a VHF 'crystal set'?
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Regen Secrets!
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Como fazer uma máquina de solda simples com velas de ignição em casa! Extremamente fácil e útil
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Heathkit GR-81 Receiver.
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Easily Modify Cheap FM Radio Receiver to Listen to Aviation Band AM Transmission.
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Three Transistor Radios to Repair
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