433 MHz - TVG Report

RFM69 Antenna Length: Start With Quarter-Wave Math, Then Tune the Installation

A free-space quarter-wave is about 17.3 cm at 433 MHz and 8.2 cm at 915 MHz, but feed point, ground, enclosure and legal band limits still determine the installed RFM69 antenna.

Wonder whether a supplied review unit changes the verdict? You're right to ask. TVG Report discloses supplied products, keeps conclusions independent, and separates manufacturer claims from verified results. Our review policy: #ProductReviews

Sep 18, 2026 · 10:03 AM PT

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You can lose an evening to a drifting first layer, a bad profile, or a part that prints cleanly and still does not fit. TVG Report looks past headline speeds to the checks, tradeoffs, and repair paths makers actually need. #3DPrinting

Sep 17, 2026 · 10:18 AM PT

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A DS18B20 at exactly 85°C may be power-on data—not heat. Trust it after conversion completes and CRC passes. Our guide maps power mode and w1_therm checks.

Sep 16, 2026 · 3:54 PM PT

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