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In the days when you can buy germanium diodes, capacitors and variable-headset from war surplus stores for pennies, your correspondent, as many of his contemporaries students build a solid-state version of his grandparents' crystal-set draw short wave radio broadcasts from around the world. Although such groups are only used to get, and therefore no need for a carefully crafted decline as a transmitter antenna, the biggest problem with them has always been build a highly effective dipole aerial. This usually consists of a length of 18-gauge insulated copper-clad steel wire tied loosely in the middle of a long pair of trees, although quite match your best antenna design based on a few miles sometimes barbed-wire around a pasture neighbor.