Portable reelable dipole antenna having frequency calibrated dial

Claim 1

An adjustable dipole antenna comprising at least two lengths of electrically conducting wire; reel means including two reels each accommodating a separate length of wire, each reel including a spool portion for receiving the wire and having a projecting ear for accommodating a handle, and an outer housing portion including a cylindrical bearing For rotatably receiving said spool portion; crank means including handles for driving said reel means; dial means including two dials each mechanically coupled to a reel for indicating operating frequency as wire is unreeled therefrom; each dial including a stationary pointer, a movable frequency calibrated dial plate, and planetary gear means for driving each of said dial plates as each of said spool portions of said reel means is rotated; a shaft which is common to and supports said two reels, said shaft extending through said cylindrical bearings of said outer housing portions; and connector means for electrically connecting each separate length of wire to radio transceiver means and providing impedance matching between said antenna and said transceiver means including two threaded conductors, knob means threadably engaging said two threaded conductors, an input connector having two terminals, transformer means connecting said two threaded conductors to said input connector, said transformer means having a first winding electrically connecting one of said conductors to a first of said two terminals, a second winding connecting the other of said conductors to the second of said two terminals, and a third winding connecting said other conductor to said first of said two terminals.