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Homebuilt Spectrum Analyzer - Part #2

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Heathkit DX-60: Part #1

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Active Probes: Part #1

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Heathkit DX-60: Part #8

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A&A Engineering QRP CW Transceiver

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Ponte a radio frequenza (RF bridge), come usarlo.

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Heathkit HG-10 VFO

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Few People Know The True Function Of A Stainless Steel Sieve! amazing Simple trick😱