Wideband Active Aerial For Shortwave Receivers

„ e19E8ii WIDEBAND ACTIVE AERIAL FOR SHORTWAVE RECEIVERS Are you among the many SW DXers that lack space or financial means to erect a high aerial tower in the back garden? Or do your neighbours object to your hanging up a long wire? Here is a compact, high-quality, balanced preamplifier that works with a shortened dipole or quad-loop aerial. The design is inex- pensive and simple to build, yet couples good noise suppression to high sensitivity and immunity to cross-modulation. It is generally known that interference is severe on practically all shortwave bands (1.6 - 30 MHz). This situation is not likely to improve in the near future in view of ever increasing man-made noise, and the tendency of owners or operators of shortwave broadcast and utility stations to use excessive output powers for political and commercial reasons. Every shortwave DXer will at some time have found that high signal levels on nearby channels give rise to cross- modulation and blocking effects in the ...