# COS Works In Simplex But Not In Duplex

**URL:** <https://community.allstarlink.org/t/cos-works-in-simplex-but-not-in-duplex/25111>\
**Category:** AllStarLink\
**Created:** [October 21, 2026, 8:08pm UTC](https://community.allstarlink.org/t/cos-works-in-simplex-but-not-in-duplex/25111 "2026-10-21T20:08:23Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![WB0VHB](https://community.allstarlink.org/letter_avatar_proxy/v4/letter/w/c5a1d2/32.png) [@WB0VHB](https://community.allstarlink.org/u/WB0VHB)\
**Post date:** [October 21, 2026, 8:08pm UTC](https://community.allstarlink.org/t/cos-works-in-simplex-but-not-in-duplex/25111/1 "2026-10-21T20:08:23Z")

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(topic deleted by author)