Barker & Williamson ALL AC BROADBAND END FED VEE User Manual

BARKER & WILLIAMSON

603 CIDCO ROAD

COCOA, FL 32926

MODEL AC - 1.8 - 30 ANTENNA

MODEL ACS - 1.8 - 30 ANTENNA

321-639-1510

The Barker & Willamson Model AC(S)-1.8-30 Broadband End-Fed Vee Antenna is designed for operation from 1.8 MHZ to
30 Mhz. The antenna comes fully assembled and pretuned so no measuring or cutting is required. It is all weather rated at
1KW output, 2KW PEP* CW/SSB ICAS**, and permits use of the full capabilities of today’s continuous coverage
transceivers. An added feature is single feedline operation for all bands and provides excellent performance for military, emergency
management, commercial, and amateur installations.

The AC-1.8-30 antenna is fabricated with #14 stranded copperweld wire, and the ACS-1.8-30 utilizes #14 stranded stainless
steel wire. Both feature a high impact plastic balun and matching network. The feedline impedance is 50 ohms and comes
equipped with an SO-239 (Female) coax cable connector. Other connector options are available special order at addditional
charge.

The antenna is generally mounted in an inverted vee configuration. With the center 25 - 30 feet off the ground, approximately
95 feet of space is required. This configuration provides best omni-directional radiation.

INSTALLATION INSTRUCTIONS

WARNING

Outdoor antennas and lead-in conductors from antenna to building shall not cross over electric light or power circuits and
shall be kept well away from all such circuits so as to avoid the possibility of accidental contact. Where proximity to electric
light or power service conductors of less than 250 volts cannot be avoided, the installation shall be such so as to provide
a clearance of at least 2 feet. Where practical, antenna conductors shall be installed so as to not cross under electric light
or power conductors.

(1) Determine how and where the antenna will be installed. Study all of the illustrations to determine which installation
best fits your individual requirements. Trees, sides of a building, utility poles, etc. make good supports. Supports may be
conductive such as a metal pole, but be certain to use insulators to keep the antenna wire from making contact.

The antenna may be set up in shapes other than those shown, or shortened, with minimal effect on the SWR. However, the
radiation efficiency at the lower frequencies will be reduced somewhat. DO NOT INSTALL PARALLEL TO POWER LINES.

(2) When unpacking and installing the antenna, avoid twisting or kinking the wire.

(3) The antenna ends may be attached various ways (refer to figures 1 - 3). Good ground rods are recommended at each end.
If the location has good, moist soil conditions the counterpoise may not be required. If needed, the counterpoise wire should
connect to the ground side of the balun. The antenna may work best with the opposite end of the counterpoise not connected
to the ground side of the balancing network. Try both to determine best results for your installation. The counterpoise is
essential in poor ground, dry soil, or above ground installations. Its length is not critical, and it does not have to run directly
under the antenna wire.

(4) When installing the antenna, ensure that the drain hole in the body of the balancing network is facing down. See figure 4.

(5) A good quality 50 ohm coaxial cable should be used for the feedline. Length is not critical, but best longer than 50 feet.

(6) Enjoy your new antenna. The AC(S)-1.8-30 is broadband and pretuned at the factory for an average SWR of 1.4:1 with
a maximum of 2.0:1, depending upon the frequency used and surrounding objects, ground conditions, etc. If you wish to optimize
performance, experiment with the counterpoise and the grounds, taking SWR readings as a guide.

* Input power to the transmitter ** ICAS -Intermittent Commercial and Amateur Service

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