Rf | ITOHI — Open-Source Hardware, Embedded Systems & DIY Builds

Antenna Placement — ELRS RX and VTX
Jul 13, 2026 · 4 min read · fpv elrs antenna rf placement range vtx diversity ·
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Antenna placement is one of the most overlooked range factors. A perfectly tuned ELRS link loses 10–20 dB when the antenna is oriented wrong — the equivalent of cutting TX power by 90%. Why Antenna Orientation Matters Omnidirectional antennas (dipoles, linear, RHCP/LHCP) have a radiation pattern shaped like a donut — …

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Pavo20 Pro II GPS Fix Attempts: BEC Switching Noise at 1575 MHz and What Actually Helped
Jul 9, 2026 · 10 min read · fpv gps pavo20 noise rf tinysa betaflight emi bec switching-regulator gps-l1 electromagnetic-interference whoop ·
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The Pavo20 Pro II is a capable 2.5" whoop — compact, powerful, with a good camera and a surprisingly solid video link even on linear whip antennas. I wanted it as a mountain trip quad: something that fits in a jacket pocket, dives canyons, and has GPS Rescue as a genuine safety net. GPS is not included; I added a …

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