A Bandpass Filter Pulls In The Signals

A hobbyist project called SignalSurge tackles the problem of nearby FM broadcast transmitters overloading amateur radio receivers tuned to the 2 metre and 70 centimetre bands. The open-source PCB design includes bandpass filters, a low-noise preamplifier, and relays for switching between receive and transmit, all controlled via logic-level signals. The surface-mount board features careful RF-aware routing, offering a more polished alternative to homemade Manhattan-style filters.

Nguồn: https://hackaday.com/2026/09/20/a-bandpass-filter-pulls-in-the-signals. 8 Sync News chỉ tóm tắt và dẫn link; bản quyền nội dung thuộc tác giả và nguồn gốc.