External Bead Baluns - "EB" Series
General Description "EB" Series
The EB series are external bead baluns. They are constructed of a length of Teflon coaxial cable surrounded by ferrite beads. At one end of the cable is a coaxial connector that mates with a cable plug on the feed line. At the other end are wire leads to facilitate connection to a dipole or driven element. The wire leads are color-coded for ease of phasing multiple elements or antennas; white = coax center. CAL-AV Labs' baluns are vacuum impregnated and sealed against weather. The exterior surface is paintable.
Baluns left to right: EB-3, EB-1, and EB-2.
(Click on the image for an enlargement.)
Purpose
A balun's purpose is to allow connecting a BALanced load (e.g., a
dipole or driven element) to an UNbalanced line, thus the name. In
transmitting antennas, this is accomplished by presenting a high impedance
to RF currents flowing outside the coax shield. This forces currents in
each side of a driven element to be equal. This is especially important in
beam antennas because it prevents distortion of the beam's pattern caused
by unequal currents in the driver(s). In a simple dipole, the balun
assures that the dipole, and not the feed line, is doing the radiating.
EB-1 Low Profile Balun
Continuous Coverage From 1.8 to 30 MHz
General Description
The EB-1 is an external bead balun. It is constructed of a length of
Teflon coaxial cable surrounded by ferrite beads. At one end of the cable
is a UHF coax connector that mates with the popular PL-259 cable-end
connector; at the other end are wire leads to facilitate connection to a
dipole or driven element. The wire leads are color-coded for ease of
phasing multiple elements or antennas; white = coax center. CAL-AV Labs'
baluns are vacuum impregnated and sealed against weather. The exterior
surface is paintable. Click on the image for
an enlargement.
EB-1 Specifications
Length: 14 inches.
Freq. range: 1.8 through 30 MHz.
Rated Power: 2.5KW CW; 3KW PEP.
See data sheet for derating details.
EB-2 Low Profile, High-Band
Balun
Continuous Coverage From 10 to 60 MHz
General Description
The EB-2 is an external bead balun. It is constructed of a length of
Teflon coaxial cable surrounded by ferrite beads. At one end of the cable
is a UHF coax connector that mates with the popular PL-259 cable-end
connector; at the other end are wire leads to facilitate connection to a
dipole or driven element. The wire leads are color-coded for ease of
phasing multiple elements or antennas; white = coax center. CAL-AV Labs'
baluns are vacuum impregnated and sealed against weather. The exterior
surface is paintable. Click on the image for
an enlargement.
EB-2 Specifications
Length: 8.3 inches.
Freq. range: 10 through 60 MHz.
Rated Power: 2.5KW CW; 3KW PEP.
See data sheet for derating details.
EB-3 Low Profile, High-Power
Balun
Continuous Coverage From 7 to 30 MHz
General Description
The EB-3 is an external bead balun. It is constructed of a piece of
coaxial cable surrounded by ferrite beads. At one end is a connector that
mates with the DIN 7/16 cable plug on the feed line. At the other end are
Teflon-insulated AWG 10 wire leads to facilitate connection to a dipole or
driven element. The wire leads are color-coded for ease of phasing
multiple elements or antennas. White = coax center. The exterior surface
is paintable. Click on the image for an
enlargement.
EB-3 Specifications
Length: 17 inches.
Freq. range: 7 through 30 MHz.
Rated Power: 10KW
See data sheet for derating details.
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2440 N. Coyote Dr, STE 116
Tucson, AZ 85745 USA
info@cal-av.com
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