tl;dr: A hacker reverse-engineered the Gemtek W1700K Wi-Fi 7 router into a wideband SDR receiver, using the MediaTek MT7996 radio to capture 14-bit IQ at up to 320 Msps across 2.4/5/6 GHz bands and streaming it over 10 GbE to a Linux host for live spectrum/waterfall display in the browser. The project runs entirely on custom firmware (no MediaTek code), with the LO tunable in ~3 Hz steps from 2.08–7.58 GHz and retunable mid-stream in ~1 ms. It's receive-only; the repo includes U-Boot, a Linux 6.18 build, the MT7996 driver, and full register documentation.