30 Apr 2025

Ferrite rod antennas on TX

It is many years since I tested my own ferrite rods as transmit antennas. Quite by accident I came across this photo from 2012.

In my view these will work as TX antennas as long as the ferrite does not saturate. With modes like WSPR and FT8 on very low power I would expect to be spotted, even though the antenna might be well down on a "proper" antenna.  

As an E-field antenna made of ferrite sort of magnifies space within it it acts like a bigger antenna.

See G3XBM4 - Ferrite Rod TX antennas

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