hat
antèn nan aktif yo montre anba a (Fig. 1), bay 14-20dB pran nan frekans yo popilè kout vag-yo ak radyo-amatè nan 1-30MHz. Kòm ou ta atann, pi ba a frekans lan pi gwo a genyen an. Yon genyen nan 20dB se tipik soti nan 1-18 megaèrts, diminye 14dB nan 30MHz.
eng
The active antenna shown below (Fig. 1), provides 14-20dB gain at the popular short-wave and radio-amateur frequencies of 1-30MHz. As you would expect, the lower the frequency the greater the gain. A gain of 20dB is typical from 1-18 MHz, decreasing to 14dB at 30MHz.