They worked that afternoon: solder bridges reflowed, capacitors swapped, a tiny switch mounted to route between modes. Marcus followed the article’s step-by-step column, checking values, jotting notes in the margin of the PDF like a pilgrim at a shrine. When they reached the test stage, the wideband module hummed awake, and the waterfall on Marcus’s secondary display bloomed with signals—powerlines of carriers, distant meteor pings, the steady thrum of a satellite beacon.
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Step-by-step build guides for DIY radio equipment, power supplies, and digital interface tools. the wideband module hummed awake