A look at a simple superhet receiver designed for CW reception. Describes each stage and demonstrates the homebrew crystal filter in operation. A 7 MHz receiver is shown but additional information on how this may be adapted to provide 14 MHz coverage is given as well.
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A steady stream of messages and news relayed from a home in suburban Kolkata kept many anxious people posted about relatives stuck in flood-ravaged Chennai, not with 21st-century technology but through its humble forefather — the radio. H... Read more