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E

Earth : A circuit connection to a ground rod driven into the ground or system of wires buried below the surface of the ground.

EIRP : Effective Isotropic Radiated Power. The sum of transmitted power and antenna gain, minus any transmission line losses.

Electromagnetic Waves : The waves emitted by an antenna, having two dimensions, electric and magnetic.

EHF : Extremely High Frequency - from 30GHz to 300GHz

Elmer Slang for a person who helps newcomers get started in amateur radio.

EME : Earth Moon Earth - bouncing a signal off the moon to a remote station that would not normally be accessible.

EMF : Electromotive Force - Voltage.

EMI : Electromagnetic Interference.

eQSL : Electronic QSL - a website for sending and receiving QSL's online.