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E.f. Johnson 121A

Technical Specifications

Attribute	Details
Manufacturer	E.F. JOHNSON
Model	121A
Product Category	Transceiver

Mic Wiring

Pin 3 – Shield / Ground
Pin 4 – Mic Audio
Pin 9 – RX

Posted in Categories: E.F. JOHNSON.

Published on: September 22, 2026 - Last updated: September 22, 2026

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