SO2R: Single-Operator-Two-Radio for Contesters

SO2R (Single-Operator-Two-Radio) is a contest technique where one operator uses two transceivers simultaneously. This article explains SO2R basics, hardware, software and Austrian contest stations.

What is SO2R?

SO2R: One operator uses two radios in parallel. Run on one radio (CQ calls), Search & Pounce on the other (hunt rare stations).

Advantage: No dead time. While QSO runs on Radio 1, search next station on Radio 2.

SO2R Hardware

• Two transceivers: Ideally same models
• SO2R controller: Switches audio, PTT, CW keying (e.g. Microham MK2R+, Top Ten SO2R+)
• Antennas: Separate antennas per band, band filters

SO2R vs. SO1R

• SO1R: One radio, simpler, ~100-120 QSOs/hour
• SO2R: Two radios, complex, ~150-180 QSOs/hour

73 – your oeradio.at team

Transparency Notice

This article was researched and written with AI assistance (Claude, Anthropic). Content reviewed by oeradio.at.

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