Search results

TX5EU 2026 DXpedition to Raivavae Island, **OC-114**, within the Austral Islands, providing a detailed account of the German/Dutch team's operations. The resource outlines the participation of operators such as DL2AWG Guenter, PA2KW Evert, and DK2AMM Ernoe, who engaged in CW, SSB, RTTY, and various digital modes. It documents the real-world challenges encountered, including significant equipment failures and antenna damage to 80/60m, 30m, and 10m verticals due to adverse storm conditions. The page offers timely news updates on the expedition's progress, noting repairs to a power amplifier's 10/12m bandpass filter, which enabled three stations to utilize amplification. Earlier reports highlighted power failures and the loss of multiple power amplifiers, necessitating one station to operate barefoot FT-8 with 100W. The team's persistent efforts to repair antennas as weather permits are also detailed, reflecting the dynamic nature of remote island operations.

The Meshtastic documentation outlines critical LoRa configuration parameters for node operation, emphasizing regulatory compliance. It details settings such as Region, Modem Preset, Max Hops, Transmit Power, Bandwidth, Spread Factor, Coding Rate, and Frequency Offset. A comprehensive table provides region codes, frequency ranges (e.g., US **902.0 - 928.0 MHz**), duty cycles, and power limits (e.g., EU_433 **12 dBm**) for numerous countries, including the US, EU, China, and Japan, alongside a 2.4 GHz band option. It explicitly states that devices within a mesh must share identical _Region_ and _Modem Preset_ settings for full communication. Modem Presets, like _LONG_FAST_ (the default), optimize for either speed or range, directly impacting network congestion and message delivery delay. For instance, SHORT_TURBO offers the fastest speed and shortest range, while VERY_LONG_SLOW provides the longest range but is less reliable for mesh formation. The document also highlights specific duty cycle limitations, such as the 10% hourly limit for EU_433 and EU_868 regions, and provides command-line interface (CLI) examples for configuring these parameters.