2-Wire Reversible Beverage

Theory & Construction

If you have a Beverage, you might want to reverse its directivity with the flip of a switch.

Reversible Beverage Feedpoint Circuit—Two relays and two transformers form the core of the contraption which receives its 12 VDC power through the coaxial cable carrying the receive signal. No control lines need be run.

Summary

The 2-wire reversible Beverage is similar to its single-wire predecessor—with the exception that it is strung with two wires spaced with insulators. This is equivalent to using open-line transmission line as the Beverage’s antenna wire. This enables the 2-wire Beverage to (i) collect radio signals from the “ether” (common mode) or (ii) convey them from the far end to the feedpoint as a balanced transmission line (differential mode). The 2-wire feedpoint circuit, seen above, consists of two RF transformers switched by relays needed to toggle between common and differential modes. Power is supplied through the coaxial cable. The schematic is provided below.