Symbol 5204 from IEC 60417 - Title/Meaning: Sense-aerial switch; sense-antenna switch Function/description: To identify the sense-aerial (sense-antenna) switch.
Additional information: 
Title was editorially improved
Published in: Supplement D, 1978
Own work using: iso.org/obp/graphics/grs/59425eb8-02be-467d-b708-94f687498d6b 200.png
Vectorization:  Mrmw