Antennas: Receiving

Antennas: Receiving
56
Antennas: Receiving
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Maximum Signal—Minimum Noise!
How often have you heard the old saying “If you can’t hear ’em, you can’t work ’em?”
This is never more true than when you are in the pileup calling that rare contact that
you need, wondering “Did he come back to me?”
DX Engineering provides all the tools you need to construct fabulous receiving
antennas—the kind that let you work stations that others can’t even hear! These W8JIdesigned amplifiers and antenna controllers are known worldwide for their unequalled
performance. Record-breaking DXpeditions—like VP6DX Ducie Island—know and use
DX Engineering receiving equipment. You should follow their lead and enjoy hearing
those weak stations like you have never heard them before.
Splitter/Combiner
Single Direction
Beverage Feed System
The DXE-BFS-1 is a single-wire Beverage Feed System.
This W8JI design is immune to strong signal overload
and core saturation common in multi-transmitter
contesting environments, and is used by winning
contest stations and low-band DXers. The unit uses
an isolated-winding, matching transformer system
to significantly increase the signal-to-noise ratio in
Beverage and other high impedance antennas.
The DXE-BFS-1 works with antenna impedances from
400-500 Ω. Included with the DXE-BFS-1 is a 470 Ω,
2 watt non-inductive resistor that withstands nearby
lightning strikes significantly better than hard-to-find carbon composition resistors.
Feedline impedance on the DXE-BFS-1 is designed for 75 Ω, although it will work
with 50 Ω coax. The DXE-BFS-1 uses an industry standard CATV type F connector.
DX Engineering sells quality 75 Ω coax and type F connectors for outdoor installations.
Benefits
• 100 kHz to 30 MHz operating range
• Spark gaps minimize damage from lightning
• Wing nut terminals eliminate soldering
• Metal housings used for superior shielding and improved life
• Flange-mount holes for easy mounting
• Ground isolated secondary essential for building beverage arrays
DXE-BFS-1
Beverage Feed System .......................................................... $54.95
DXE-ECM-R470-2 470 Ω, 2 Watt Resistor, Lightning Damage-Resistant,
Pack of 10 ............................................................................... $20.00
DXE-TB-5P
Reversible
Beverage System
The DXE-RBSA-1P allows two Beverage antennas
receiving in opposing directions to share the same space.
With the DXE-RBSA-1P, you can build a 2-wire reversible
Beverage antenna system with superior signal-to-noise ratio, most useful at 40, 80 and 160M bands. The W8JI design
consists of a Feedpoint System and Reflection Transformer.
You can operate and even confirm the F/R ratio of this
antenna at any time from the operating position.
This system is immune to strong signal overload and
core saturation common in multi-transmitter contesting
environments, and is used by winning contest stations and
low-band DXers.
The DXE-RBSA-1P has two antenna ports. The standard configuration of the DXE-RBSA-1P
has one port terminated (termination included) so both antennas share a common
feedline. Applying 10 to 18 Vdc to the feedline switches between the antenna, and the
direction of reception. For simultaneous reception from opposing directions, each of the
two feedlines connect to a separate receiver.
While the DXE-RBSA-1P is optimized to use 450 Ω ladder line for the antenna element,
the system will work with any 300-600 Ω 2-wire line. 450 Ω ladder line is available from
DX Engineering, sold separately. DX Engineering also sells quality 75 Ω coax and Type F
connectors for outdoor installations.
Benefits
• Broad operating range, 0.2 to 30 MHz
• Fully isolated grounds used to prevent common-mode noise and unwanted signals
• 75 Ω design enables the use of high quality, low cost cable
• Metal housings used for superior shielding and improved life
DXE-RBSA-1P
Reversible Beverage Feed System ..................................... $209.95
DXE-TB-5P
Tilt Base.................................................................................. $19.95
Use the DX Engineering DXE-RSC-2 to combine two
receiving antennas to form an array or to split the signal
from an antenna to feed two receivers. The DXE-RCS-2
reduces problems and performance shortfalls caused by
impedance errors in less-than-perfect antenna systems.
Benefits
• High-quality components
• Reliable weathertight connectors
• Broad 0.3 to 30 MHz operating range
• Metal housings used for superior shielding and improved life
• Economical solution to potential impedance errors
• Spark gaps minimize damage from lightning
Combining
Use the DXE-RSC-2 to combine, with negligible loss, two antenna systems into a single
feedline. Some examples are two antennas forming an in-phase (broadside) receiving
array, Cross-fire Echelon Beverage array, or any type of array with fixed phasing.
There are a number of advantages of using the DXE-RSC-2 for combining antenna
systems over a standard parallel connection.
• The DXE-RSC-2 matches the entire antenna system to the cable impedance
• Unlike quarter-wave matching sections that only work on one band, the DXE-RCS-2
has an extremely wide bandwidth
• With antennas connected directly in parallel, if either one develops a high impedance
open, becomes shorted, falls down or has a feedline problem, the entire antenna
system may become unusable. By using the DXE-RSC-2, only the problem antenna is
unusable—the antenna on the other port can still be used. Due to the built-in isolation
and balancing, the DXE-RSC-2 limits the total signal loss to approximately 6 dB
• The DXE-RSC-2 provides very high isolation between ports 1 and 2. This prevents
either antenna from interfering with the other during normal operation
Splitting
Use the DXE-RSC-2 to split an antenna signal in two, typically to feed two receivers.
Typical signal level reduction through the DXE-RSC-2 when used as a splitter is just over
3 dB per port. This is because each port receives half the available input power, and the
DXE-RSC-2 has some very small additional loss in internal components.
As with any system, losses are based on source and load impedances being equal. The
DXE-RSC-2 normally provides equal power, voltage, and current to matched loads on
ports 1 and 2.
The primary advantage of the DXE-RSC-2, when feeding multiple receivers from one
antenna, is that individual receiver will not seriously affect the signal level of the other
receiver. This prevents receiver band filters attached to one port from “shorting” or
loading the signal of another receiver tuned to a different band. In addition, any spurious
signals generated in one receiver are greatly attenuated by the other DXE-RSC-2 before
reaching the second receiver.
DXE-RSC-2
2-Port Splitter and Combiner ............................................... $54.95
2-Port Receiving
Antenna Switch
Select one of two output ports (generally connected to
different receiving antennas) from one feedline using the
DXE-RLS-2. Install the DXE-RLS-2 with two DXE-RBS-1P
Reversible Beverage Antenna Systems and select four
directions using a single main feedline. Install one or more
DXE-RLS-2s to expand larger Beverage arrays and share the
feedline back to the operating position.
Applying a nominal 12 Vac or DC control voltage through the
feedline activates transfer to port 2. Use DX Engineering’s
DXE-FVC-1 Voltage Coupler to supply the control voltage
through the feedline.
Benefits
• Metal housings used for superior shielding and improved life
• High-quality components
• Reliable CATV type F connectors standard
• Broad 0.3 to 30 MHz operating range with 75 Ω systems
• Jumper-selectable—control voltage pass-through to the selected port
DXE-RLS-2
Receiving Antenna Switch .................................................... $79.95
Find More Brands, More Products and
More Specs at DXEngineering.com
Antennas: Receiving
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RTR-1A Antenna
Receive Interface
Horizontal Configuration
Vertical Configuration
If you have a standard
transceiver without a separate
receive input port; but you want
to enjoy the advantages of a
separate receive antenna, DX
Engineering has the perfect solution.
Connect an external receive-only antenna to your transceiver with this interface, or
add a TX/RX switch to your older gear, insert a receive preamplifier and add interfacing
antennas to phasing or noise cancelling systems. The RTR-1A also provides failsafe
protection to the unswitched receive antenna port on your expensive transceiver.
This Active Receive Interface handles 200 watts, supports full break-in CW and uses a
patented* low-noise receive antenna limiter circuit. It is RoHS-compliant and well suited
for use from 1.8 MHz to 30 MHz.
DX Engineering’s Active Receive Interface is an invaluable accessory for your shack,
allowing you to expand and improve your antenna connection systems. All the details
on this innovative unit are at DXEngineering.com.
DXE-RTR-1A
Receive Antenna Interface .................................................. $159.95
*US Patent 8,175,546
Receive Feedline
Current Choke
The Receive Feedline Current
Choke (RFCC) is the most
effective solution to commonmode noise or unwanted signal
ingress in receiving systems
available. It provides thousands of
ohms isolation between the input and output coaxial shield connections while passing
desired signals, including DC or low frequency AC control signals. The RFCC has
extremely high isolation impedance, which effectively blocks common-mode noise or
unwanted signals, even in the presence of very poor grounding. The RFCC is effective
from 300 kHz to 30 MHz. It comes with standard type F female connectors, although it
can be used in any 50 to 75 Ω receiving system.
DXE-RFCC-1
Receive Feedline Current Choke, 50/75 Ω, 0.3-30 MHz ................$69.95
Feedpoint
Voltage Coupler
• Inject control voltages onto feedline
• Injects +/- 12 Vdc or 12 Vac
• For use with DXE-RBS-1P Reversible
Beverage System or Remote
2-Position Switch DXE-RLS-2
• AC supply included
DXE-FVC-1
Feedpoint Voltage Coupler ....................................................$89.95
Time Variable Sequence Unit
Protect your
active antennas,
transmit/receive
relays and other
equipment with
the DX Engineering
Sequencer. You
have full control
of the timing
between your
rig and amplifier.
This microprocessorcontrolled device provides 0-30 milliseconds of delay in 2 millisecond steps to as many as
five outputs tied to the key-in line. You can sequence the switching of critical devices such
as the transmit/receive relay, amplifier, and exciter.
In addition, the DXE-TVSU-1A has an internal side tone generator for CW. You listen to
what you are keying while it is being held in the bucket brigade delay for transmit after
the programmed delay. The side tone is adjustable from 300 to 1000 Hz in 50 Hz steps.
Benefits
• Control timing on PTT turn-on, hang delay of PTT, hang delay of amplifier, hang delay
of antenna relay, and turn-on delay of auxiliary output
• Dip switch settable delays of 0-30 milliseconds in 2 millisecond steps
• Side tone generator that follows input of keyer or hand key, not transmitter
• Side tone can be programmed for 300-1000 Hz in 50 Hz steps, adjustable volume
• Supports CW full break-in
• Allows use of our Active Receive Antennas in close proximity to transmit antennas
DXE-TVSU-1A
Time Variable Sequence Unit ............................................. $199.95
< ARAH system located between
1/10-wavelength and 1/2-wave length
from the transmitting antenna,
connected to a transceiver with a
receive input using the DXE-TVSU-1A
Time Variable Sequencer Unit for
proper switching.
Active Receive Antenna Systems
V-Saddle
Clamp
Mounting
Side View
DX Engineering’s Active Receive Antenna Systems offer excellent
receiving performance using a 102" whip antenna. The unique
design is vastly superior to traditional active antennas in both
signal handling and feedline decoupling. You get significantly
better weak signal reception.
Available in vertical or horizontal dipole configurations, the
systems include a non-conductive mounting plate, clamps,
active matching system, and the 102" stainless steel whip
elements. The horizontal dipole element uses two 102" whips
for an overall length of 210"; the vertical configuration uses a
single whip. Whip antennas have excellent wind survival and
are very inconspicuous.
When space is limited, use the DXE-ARAV3-1P or DXE-ARAH3-1P in conjunction with the
DXE-TVSU-1 to provide for operation within 1/10-wavelength of a transmit antenna. The
active antennas have relay protection to prevent overload of the transmit signal. The
DXE-TVSU-1A sequencer controls switching times to ensure the receive system is
protected before transmit power is applied. Use the DXE-ARAV3-4P, DXE-TVSU-1A
and DXE-RFS-2 to provide four-square operation within 1/10-wavelength of a
transmit antenna.
The vertical configuration can be used as a single element or in combination with
DX Engineering’s RFS-2 Receive Four-Square Antenna System to build a broadband
directional array that can be switched in four directions to peak the signal or null out
noise. Vertical configurations are for suburban or rural locations with low levels of ground
wave propagated noise. The dipole configuration makes a very sensitive, horizontally
polarized receiving antenna. Horizontal polarization can greatly reduce ground wave
propagated noise in congested urban environments. Light weight and low wind resistance
reduces support requirements. The output connector is a Type F, allowing use of readily
available high performance CATV feedlines and connectors .
Features
• Sensitive—weak signal sensitivity rivaling full size antennas
• Wide bandwidth—100 kHz to 30 MHz
• Excellent strong signal handling—outstanding third order intercept of +30 dBm
• Reduced noise—quiet FET followers and high feedline shield isolation
• Easy mounting and installation—pre-drilled mounting plate and universal clamps
DXE-ARAH3-1P
Active Receive Antenna,
Horizontal Configuration with Relay ................................. $349.95
DXE-ARAV3-1P
Active Receive Antenna,
Vertical Configuration with Relay ...................................... $248.95
58
Antennas: Receiving
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DXE-RFS-SYS-4P
Complete Package
DX Engineering
Receive 8 Circle
Packages
These packages are built around the DX Engineering Receive 8 Circle Array Controller and
the EC-RCA8 Receive Eight Circle Control Console. They are designed to be used with
eight identical, symmetrically-spaced vertical elements—active or passive—to provide
switching for an eight-direction receiving antenna system. (Passive elements will generally
provide you with a monoband receiving system).
The Receive 8 Circle system uses time-delay phasing (rather than conventional narrowband, frequency dependent phasing) to provide eight 45 degree-spaced directional
patterns. The time-delay phasing is directivity-optimized to produce wider and deeper
rear nulls and a narrower main lobe. The result is greatly reduced noise and undesirable
signals for a superior front-to-rear ratio (F/R). Better control of phase and currents
provides a cleaner pattern than found on vertical antenna transmit arrays.
The system also offers greater reliability in receiving applications. The RC8 controller uses
sealed relays—sized for receiving applications—with oxidation-resistant silver contacts.
Most transmitting four-square switches use large open-frame relays with exposed brass
contacts, which can lead to contamination, oxidation, and poor conductivity.
The DXE-RCA8B-SYS-2P Controller and Switch Package includes:
• DXE-RC8B-1 Receive 8 Circle Array Controller
• DXE-EC-RCA8 Receive 8 Circle BCD Control Console
• DXE-SSVC-2P Stainless Steel V-Clamp for mounting the RC8B to a 1-2" O.D. post
The DXE-RCA8B-SYS-3P Electronics Package
Includes everything from DXE-RCA8-SYS-2P, plus:
• Eight DXE-AVA2 Active Voltage Amplifiers with internal disconnect relays
• DXE-RPA-1 Receiver Preamplifier, 0.3-35 MHz
• Custom-made delay line—75 Ω F6 flooded coaxial cable with Snap-N-Seal®
connectors installed
The DXE-RCA8B-SYS-4P Complete Electronics Package
Includes everything from DXE-RCA8-SYS-2P, plus:
• DXE-ARAV3-8P Active Receive Antenna Array Package (see below)
• Two DXE-F6-1000 F6 flooded coax cable, 75 Ω (1,000' each)
• DXE-CPT-659 Coax Cable Prep Tool
• DXE-SNS-CT1 Snap-N-Seal® crimp tool for 75 Ω coax
• DXE-SNS6-25 Snap-N-Seal® connectors for F6 coax, 25 pieces
DXE-RCA8B-SYS-2P Receive 8 Circle Controller and Switch Package .............. $498.95
DXE-RCA8B-SYS-3P Receive 8 Circle Electronics Package ..............................$1,497.95
DXE-RCA8B-SYS-4P Receive 8 Circle Complete System Package...................$2,575.00
Receive Four-Square System
•
•
•
•
W8JI design
Excellent directivity in a small space for better signal-to-noise ratio
Switchable in four 90 degree spaced directions
Reduced susceptibility to high angle signals compared to EWE, Flag, Pennant,
or K9AY arrays
• Operates from 100 kHz to 30 MHz
• Each complete system package includes four active vertical antennas, RFS-2 switch,
CC-8A controller, 1,000 feet of F6 flooded cable, connectors and tools
• TVSU-1 Time Variable Sequencer Unit included to protect active
antennas installed as close as 1/10-wavelength from transmitting antenna
DXE-RFS-SYS-4P
Receive Four-Square System Package ...........................$1,650.00
DXE-RFS-SYS-2P
Four-Square Controller and Switch Package .................... $343.95
DXE-RFS-SYS-3P
Four-Square 160/80/40M Electronics Package ................. $799.00
DXE-EC-4
Four-Square Controller, 4-Position BCD Output ................. $89.95
DXE-TVSU-1A
Time Variable Sequencer Unit ........................................... $199.95
System components also available individually.
Complete Electronically Steered Receiving System
•
•
•
•
•
More than 5 S-units of front-to-back on optimized systems
Works best on 160M, 80M and 40M
Like having a rotatable Beverage antenna
Fits in YOUR yard!
Easily installed—no radials required
Want to know what people are saying aboout this system?
Visit: www.eham.net/reviews/detail/5336
Optimal signal-to-noise
ratio occurs at 1/4wavelength side length
DXE-ARAV3-8P
Active Receive
Antenna Array Package
The DX Engineering Active Receive Antenna
Array Package contains eight DXE-ARAV3-1P
Active Receive Antennas. They offer excellent
receiving performance from 100 kHz to 30 MHz
while using only 102" whips as the vertical
elements. This results in significantly better
weak signal reception due to lower spurious
signal interference and reduced noise. The
package also includes mounting blocks, wiring,
and mounting clamps.
DXE-ARAV3-8P
Active Receive Antenna Array Package...........................$1,991.60
Antennas: Receiving
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Typical Installation
for DX Engineering NCC-1
This diagram shows the DX Engineering NCC-1 in a station with a single
transceiver that has a separate receive antenna port. The two active receive
antennas are shown deployed in the recommended position. The DX Engineering RPA-1
Preamplifier is normally not needed as most of today’s transceivers have
built-in preamps to compensate for overall lower signal levels obtained from small
receive-only antennas. What is most important is the NCC-1’s ability to improve
the overall signal-to-noise ratio improvement and null out interference from other
directions.
The diagram shows the transceiver keying line set up to allow the NCC-1 to shut
off the power to the DXE Active Receive Antennas, which have an internal relay which
grounds the antenna for protection from TX RF.
The DX Engineering NCC-1 can be used with many receiving antenna combinations
including Single and Reversible Beverages, Receive Four-Square Arrays, K9AY
Loops, and more. It will increase the directivity of any properly spaced combination
of two similar antennas as long as the signal levels are within the range of the
balancing controls.
Receive Antenna
Variable Phasing
Controller
Allows control of signal level and
phasing of two receive antennas—
see specifications below. It is available
separately for those who want to design
their own variable receive antenna system.
DXE-NCC-1
Receive Antenna Variable Phasing Controller .................. $599.95
See NCC-1 specifications below.
Phase two Receive antennas at proper spacing.
For optimal results, use identical antennas.
Electronically Rotatable Receive Antenna System
Phased receive-only antenna systems are used to create a directional pattern which can
peak desired signals and remove interfering signals. Variable phase nulling allows an operator to improve reception by electronically reducing a stronger interfering signal arriving from
a different direction.
This system includes two Active Receiving Vertical Antennas and the DXE-NCC-1 Receive
Antenna Variable Phasing Unit. It combines the two verticals to produce a steerable
directional array. The system improves your reception of weak DX by:
• Combining two omni-directional antennas to produce an adjustable directional pattern
• Reducing overload from a strong signal in a different direction
• Reducing interference from distant signals or noise in a different direction
• Nulling directional strong signals to hear weak stations on the same frequency
Features
• Vertical antenna elements only 102" long
• Ideal for Amateur Radio or Shortwave listening
• Antenna elements are grounded when power is turned off
• Use with DXE-TVSU-1A sequencer for best protection before transmitting
NCC-1 Phasing Unit Specifications
• Usable Frequency Range: 300 kHz to 30 MHz
• Optimum Performance Range: 500 kHz to 15 MHz
• Third Order Output Intercept: +32 dBm each input, +38 dBm both inputs combined
• Gain Flatness: +/- 1 dB over complete phase rotation
• Gain: Adjustable from 0 dB to -40 dB
• Available Phase Rotation: >360 degrees between 500 kHz and 15 MHz
• Power: NCC-1 +13 Vdc nominal @ 1A minimum (2A recommended)
• Antenna Port Power: 10-30 Vdc @ 300 mA maximum, TX muting available
DXE-AAPS3-1P
Active Antenna Phasing System......................................$1,099.95
Desired Directions
MFJ 1.5-30 MHz
Deluxe Noise Canceller
Noise Source
This unit is designed to reduce noise or
interference—or improve desired signals—
before the noise affects sensitive receiver
circuits. Unlike conventional noise blankers, it
is effective on all types of noise, including interference (QRM) from unwanted signals.
You can adjust both phase and amplitude while combining two antenna inputs.
The antenna inputs can be from two external antennas, or an external antenna and
the unit’s internal whip antenna. The signal output for the receiver is the vector
addition or subtraction of signals from the two separate antennas. This removes
unwanted noise and enhances desired signals.
The Deluxe Noise Canceller is optimized over the range of 1.8 to 30 MHz and has the
interface circuitry necessary for operation with most modern HF transceivers.
MFJ-1026
1.5-30 MHz Deluxe Noise Canceller .................................... $179.95
60
Antennas: Wire Antennas & Parts
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Rugged Construction—Maximum Reliability!
DXE-UWA-KIT
DXE-WA-070
DXE-UWA213-KIT
DXE-UWA8X-KIT
Universal Wire
Antenna Kits
DX Engineering’s three Universal Wire
Antenna (UWA) Kits offer the right
combination of parts and hardware to
create a wide variety of antenna designs.
You can create any type of wire antenna, including single band, multi-band, multifrequency and folded dipole, doublet and inverted-vee, off-center fed, Windom, Zepp,
long wires, rhombic, vee beam, and loop antennas.
The kits feature the new EZ-BUILD™ Center-T insulator and end insulators. The
insulators have a unique patented design that features a serpentine wire grip for
insulated DX Engineering Antenna Wire and DX Engineering’s high strength, high power
300 Ω ladder line. The serpentine wire connection grip is strong enough to support the
antenna wires without looping or wrapping the wire ends. This allows fast and easy field
adjustments of antenna length without soldering!
The insulators are made of a lightweight, high strength, UV-protected material. The
center-T insulator is designed to serve as a feedpoint and strain relief for antennas made
with either wire or ladder line, which may be fed with either ladder line or coaxial cable.
The center-T insulator can be the main support point for the antenna feedpoint by using
the top center hole to attach a support rope. It also serves as the mounting and support
point for any DX Engineering Balun.
The DXE-UWA8X-KIT and DXE-UWA213-KIT kits include a new strain relief bracket and
P-clamps with neoprene cushions that grip the coaxial cable without deforming it, taking the weight of the hanging cable off of the connector. Each kit also includes crimp-on
ring terminals for ladder line and antenna wire, and connection hardware.
DXE-UWA-KIT
Universal Wire Antenna Kit ....................................................$19.95
DXE-UWA8X-KIT
Universal Wire Antenna Kit for RG-8X ...................................$39.95
DXE-UWA213-KIT Universal Wire Antenna Kit for RG-213 .................................$39.95
DXE-UWA-END-KIT End Insulators, Package of 8 .................................................$12.00
Antenna Support Rope
Synthetic Textile Industries’
double-braided Dacron/Polyester
ropes are not weakened by decay
or mildew and provide excellent
resistance to abrasion. The
color-sealed, black polyester yarn
used in the braided jacket also
protects the cord from damage due
to ultra-violet light. It is available in
SYN-DBR-187-100
SYN-DBR-94-100
a variety of diameters and lengths.
SYN-DBR-94-100
3/32" Diameter Rope, 100' Roll ............................................. $9.95
SYN-DBR-94-1000 3/32" Diameter Rope, 1,000' Roll ........................................ $71.95
SYN-DBR-125-100 1/8" Diameter Rope, 100' Roll ............................................. $11.95
SYN-DBR-125-1000 1/8" Diameter Rope, 1,000' Roll .......................................... $81.95
SYN-DBR-187-100 3/16" Diameter Rope, 100' Roll ........................................... $16.95
SYN-DBR-187-350 3/16" Diameter Rope, 350' Roll ........................................... $49.95
SYN-DBR-187-500 3/16" Diameter Rope, 500' Roll ........................................... $69.95
SYN-DBR-312-100 5/16" Diameter Rope, 100' Roll ........................................... $24.95
SYN-DBR-312-500 5/16" Diameter Rope, 500' Roll ........................................... $98.95
SYN-DBR-437-500 7/16" Diameter Rope, 500' Roll ......................................... $209.95
Ladder-Line
Fed Dipole Antennas
DXE-WA-260
The DX Engineering multi-band dipoles
are rugged yet lightweight. Each model
resonates at the low end of the band
specified. They are usable to 30 MHz with
a wide range tuner and come complete with
the wire elements, ladder feedline, center-T
support and end insulators.
• Elements: 14 AWG copper, PVC jacket for flexibility and strength
• Feedline: 100 feet, 18 AWG, 300 Ω ladder line, UV-resistant, 0.88 VF
• Hardware: stainless steel
• Center-T support and end insulators: High impact, UV-resistant material, black
• Power Rating: 1,500 W
DXE-WA-260
Antenna, 260' Long for 160M and Up................................... $59.95
DXE-WA-135
Antenna, 135' Long for 80M and Up..................................... $49.95
DXE-WA-070
Antenna, 70' Long for 40M and Up....................................... $49.95
Center Insulator
for Multi-Band Doublets with SO-239
This weatherproof, lightweight, high strength center
insulator is used for connecting coaxial feedline to a
doublet-type antenna. The insulator can be hung from a supporting mast. It has an
SO-239 connector to attach to coaxial cable with a matching PL-259 connector.
HGN-C-1C
Center Insulator for Multi-Band Doublets ........................... $29.95
Premium Copper Antenna Wire
Use DX Engineering antenna wire to achieve top performance and long-life, trouble-free
operation. This insulated copper wire is UV-resistant and lays out easily, unlike the wire
that is commonly available at the “big box” stores which coils and kinks. It will last much
longer in contact with the
environment than bare wire. It is
available in pre-cut lengths for
easy dipole assembly, or in bulk
lengths of 500 and 1,000 feet.
• Heavy #14 AWG stranded
copper antenna wire
• UV-resistant insulation
• Reduces precipitation static
• Long, reliable life
DXE-ANTW-75
DXE-ANTW-150
DXE-ANTW-300
DXE-ANTW-500
DXE-ANTW-1000
#14 Insulated Antenna Wire, 40M & Up, 75' ....................... $11.45
#14 Insulated Antenna Wire, 80M & Up, 150' ...................... $20.95
#14 Insulated Antenna Wire, 160M & Up, 300' .................... $39.95
#14 Insulated Antenna Wire, Multiple Antennas, 500'........ $74.95
#14 Insulated Antenna Wire, Multiple Antennas, 1,000'... $142.95
Antennas: Wire Antennas & Parts
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ALF-DX-CC
ALF-DX-DD
ALF-DX-EE
MFJ-2010
ALF-DX-LBPLUS
MFJ-1778
MFJ Wire Antennas
ALF-DX-LB
ALF-DX-B
ALF-DX-A
G5RV All-Band HF Antenna
The world-famous G5RV antenna is a multi-band center-fed dipole with a 1,500 watt
capacity. Designed as a 3/2 wavelength antenna for 14 MHz, it provides reasonable
performance on many other bands. The antenna covers all bands from 160 to 10
meters when used with an antenna tuner. At 102 feet long, the G5RV is shorter than an
80 meter dipole.
MFJ-1778
G5RV All-Band HF Antenna .................................................. $44.95
OCFD 40/20/10/6 Meter Dipoles
These antennas are CAD designed and engineered for low SWR, high efficiency, wide
bandwidth, and frequency agility on all four of amateur radio’s most interesting DX bands!
The antennas are cut to length and preassembled—just connect your feedline. They’re
lightweight and easy to install.
MFJ-2010
OCFD UltraLite Dipole, 300 Watts ........................................ $59.95
MFJ-2012
OCFD PowerLite Dipole, 1.5 kW............................................ $79.95
Alpha Delta Wire Antennas
Multi-Band Dipole Wire Antennas
These complete resonant antennas include DELTA-C center insulator and end
insulators, ISO-RES coils, and separate wires for different bands. All wires are attached to
the center insulator. An ARC-PLUG™ static electricity protector is built in. Stainless steel
hardware and 12-gauge solid copper wire ensure long life. Antennas are shipped fully
assembled. No antenna tuners are necessary, except for 15 meter band with DX-CC.
ALF-DX-CC
80-10 Meter Parallel Dipole................................................. $159.00
ALF-DX-DD
80-40 Meter Single Dipole ................................................... $129.00
ALF-DX-EE
40-10 Meter Parallel Dipole................................................. $139.00
ALF-DX-LB
160-80-40 Meter Single Wire Dipole ................................... $159.00
ALF-DX-LBPLUS
160-10 Meter Parallel Dipole............................................... $189.00
ALF-SEP
Replacement ARC-PLUG protector ...................................... $15.95
Multi-Band Sloper Wire Antennas
These antennas provide good DX performance for limited space installations by combining the tremendous DX firepower of a quarter-wave sloper with the wide bandwidth of a
half-wave dipole antenna. A built-in ARC-PLUG™ static electricity protector is included.
Because the installation of sloper antennas depends on your available mounting circumstances, the use of a wide range antenna tuner is recommended for best performance.
ALF-DX-A
Twin Sloper, 160/80/40 Meter............................................... $99.00
ALF-DX-B
Sloper, 160/80/40/30 Meter ................................................ $109.00
ALF-SEP
Replacement ARC-PLUG Protector ...................................... $15.95
SWL Antennas
Fully assembled for fast, easy installation, these antennas are optimized to provide
best broadband receiving performance from the AM broadcast band through 30 MHz.
The antennas include ISO-RES inductors, solid copper wire elements and the exclusive
DELTA-C center insulator with a built-in ARC-PLUG™ static electricity protector. Stainless
steel hardware and 12-gauge solid copper wire ensure long life.
ALF-DX-SWL
SWL Sloper Antenna, 60'..................................................... $119.00
ALF-DX-ULTRA
SWL Parallel Dipole, 80' ...................................................... $159.00
ALF-SEP
Replacement ARC-PLUG Protector ...................................... $15.95
Typical Inverted V
Installation
ALF-DELTA-C
Antenna Insulator Kit
with Surge Protection
ALF-DELTA-CIN
ALF-SEP
This kit contains one center insulator, antenna connection hardware, one ARC-PLUG
static electricity protector, and two end insulators. The antenna hardware is molded of
Deltalloy™, an extremely tough and durable plastic specifically blended to withstand
sunlight and extreme weather conditions. An SO-239 connector is provided for direct
connection to your coaxial cable. A ladder line balanced feedline may be connected
directly to the dipole wire ends.
ALF-DELTA-C
Antenna Insulator Kit ............................................................ $29.95
ALF-DELTA-CIN
Replacement End Insulator .................................................... $1.95
ALF-SEP
Replacement ARC-PLUG Protector ...................................... $15.95
62
Baluns, UNUNs & Chokes
Proven Products.
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Jerry Sevick W2FMI-inspired COMTEK Baluns
COMTEK Baluns
COMTEK Baluns were inspired by the writings of Jerry Sevick W2FMI, published in
his book Understanding, Building and Using Baluns and Ununs. COMTEK baluns are
value-engineered to provide maximum performance at minimum cost while providing
a superb, efficient match between unbalanced coax and balanced antennas.
• Design inspired by Jerry Sevick W2FMI with modern improvements from
DX Engineering’s in-depth balun R&D
• Unique high voltage compensating capacitors for unequalled SWR bandwidth
• Outstanding ferrite mix coated toroid core with special design to accommodate
close coupling without excessive stress
• Exceptionally high and consistent common-mode impedance across the specified
band width provides isolation where it is needed most
• Special wire size selection and Teflon®-insulated wire sleeves provide exact impedance
matching and superb insulation - unlike common Thermaleze® wire
• Typical insertion loss is less than 0.2 dB
• Power handling from 3 kW continuous to 7 kW intermittent, depending on model
May be used to 54 MHz with reduced ratings
• Gasketed SO-239 connectors are silver plated with Teflon® insulation.
• All hardware is Stainless Steel. Studs are 1/4"-20
• COMTEK Baluns are sealed in a weatherproof 4" x 4" x 2" NEMA box which makes
an excellent outdoor enclosure
1:1 Dual Wire/Single Core
COM-BAL-11130E 3 kW, 1.8 to 54 MHz, Side Eyebolts....................................... $55.95
COM-BAL-11130ET 3 kW, 1.8 to 54 MHz, Side/Top Eyebolts ............................... $55.95
COM-BAL-11130S 3 kW, 1.8 to 54 MHz, Side Studs............................................ $55.45
COM-BAL-11130T 3 kW, 1.8 to 54 MHz, Top studs ............................................. $55.45
1:1 Coax/Single Core
COM-BAL-11150E 5 kW, 1.8 to 54 MHz, Side Eyebolts....................................... $63.45
COM-BAL-11150ET 5 kW, 1.8 to 54 MHz, Side/Top Eyebolts ............................... $63.95
COM-BAL-11150S 5 kW, 1.8 to 54 MHz, Side Studs............................................ $62.45
COM-BAL-11150T 5 kW, 1.8 to 54 MHz, Top studs ............................................. $62.45
1:1 Dual Wire/Dual Core
COM-BAL-11140T 5 kW, 1.8 to 54 MHz, Top studs ............................................. $78.95
COM-BAL-11140S 5 kW, 1.8 to 54 MHz, Side Studs............................................ $78.95
1:1 Coax/Dual Core
COM-BAL-11150DS 5 kW, 1.8 to 54 MHz, Side Studs............................................ $78.95
COM-BAL-11150DT 5 kW, 1.8 to 54 MHz, Top studs ............................................. $78.95
4:1 Dual Wire/Single Core
COM-BAL-41130E 3 kW, 1.8 to 54 MHz, Side Eyebolts....................................... $67.45
COM-BAL-41130ET 3 kW, 1.8 to 54 MHz, Side/Top Eyebolts ............................... $68.45
COM-BAL-41130T 3 kW, 1.8 to 54 MHz, Top studs ............................................. $67.45
COM-BAL-41130S 3 kW, 1.8 to 54 MHz, Side Studs............................................ $67.45
4:1 Dual Wire/Dual Core
COM-BAL-41150T 5 kW, 1.8 to 54 MHz, Top studs ............................................. $93.95
COM-BAL-41150S 5 kW, 1.8 to 54 MHz, Side Studs............................................ $93.95
COM-BAL-41150E 5 kW, 1.8 to 54 MHz, Side Eyebolts....................................... $93.95
Contact DX Engineering Customer Support to discuss your application or for recommendations.
Balanced Current
With No Balun
W2FMI Series Baluns
When properly connected to balanced antenna loads like symmetrical dipoles,
unbalanced coaxial feedlines must have exactly equal and opposite currents on the
shield and center conductors. COMTEK baluns are value-engineered to provide
maximum performance at minimum cost while providing a superb, efficient match
between unbalanced coax and balanced antennas.
Balanced current distribution along the halves of the antenna assures correct pattern
shape and antenna efficiency. Current baluns add common-mode isolation between
the antenna and coaxial feedline.
The expected figure-8 dipole azimuth pattern cannot be achieved unless RF current
is flowing equally on both halves of the dipole. The COMTEK current baluns force
equal current to flow and prevent high values of common mode feedline current.
This eliminates pattern distortion, unpredictable performance, RFI, and noise pickup
from nearby sources like TV sets and computers.
Baluns come in ratios for effective SWR matching between the 50 Ω coaxial
transmission line and the antenna feedpoint based on the feedpoint impedance.
COMTEK baluns have been designed to provide the lowest possible SWR match
across the specified frequency range.
Current baluns isolate or add impedance to unwanted common-mode current paths,
reducing or controlling common-mode current. Current baluns are the best choice in
almost all situations because they work better in most real-world systems by isolating
the input and output connections.
Contrary to some published information, a high common-mode impedance across a
wide frequency range is absurd, if not unachievable. The highest impedance values
are most useful at lower frequencies, while lesser impedance values are more than
adequate at the high end of the HF range. In most cases, baluns are installed as close
as possible to a balanced-to-unbalanced transition point.
Baluns, UNUNs & Chokes
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4:1 High Power UNUN
for Non-Resonant Vertical Antennas
Using non-resonant multi-band antennas? This
UNUN helps your antenna system operate at maximum
efficiency by minimizing transmission line losses
caused by SWR. You can add this UNUN to any 43 foot
antenna system; it covers 1.8-30 MHz and can handle
2 kW CW/5 kW SSB.
Mounting and feedpoint connection kits are available
separately; or you can purchase everything together for a complete installation package.
DXE-UN-43
High Power 4:1 UNUN ......................................................... $104.95
DXE-UN-BRKT
UNUN Mounting Kit ............................................................... $22.95
DXE-TCB-UNFK
UNUN to Vertical Feedpoint Connection Kit ......................... $9.50
DXE-UN-43-R
Complete Package with UNUN,
Mounting and Feedpoint Kits ............................................. $129.95
Balun Mounting and Installation Solutions
Mounting your balun correctly is critical to maintaining its reliability. Here are several
options to ensure your balun is ready to face Mother Nature.
Balun or Choke Mounting Kit
The DXE-VFCC-BRKT is the same bracket kit supplied with
our Vertical Feedline Current Chokes. It also works well with
several other models. The kit includes the stainless steel
bracket and insulated shelf. You can mount it to a standard
4x4 or 6x6 wooden post with basic wood screws. If you’re
using this kit to mount your balun to 1 to 2 inch O.D. pipe,
you’ll want to use a durable clamp; we recommend our
V-Saddle Clamp.
DXE-VFCC-BRKT
Balun or Choke Mounting Kit ............................................... $19.95
DXE-SSVC-2P
V-Saddle Clamp ..................................................................... $11.95
Find the Full Specs on
Every DX Engineering Balun at
DXEngineering.com,
or Call Us and We’ll Find the Perfect
Match for Your Application!
Maxi-Core® High Power
Transmission Line Transformers and Baluns
Ensure that your antenna system is operating optimally. These
units have perfected the unbalanced-to-balanced transition, giving
you the strongest signal your antenna is capable of producing
in both transmit and receive situations. In addition to increased
performance and coverage, these baluns reduce the electrical
stress on your expensive equipment.
They cover the 1.8 to 30 MHz frequency range and with increased
operating bandwidth compared to other baluns. Depending on
the application, the baluns use ceramic insulators, stainless steel
hardware and PTFE/silver SO-239 connectors.
Each balun is housed in either a lightweight, formed aluminum
enclosure for basic outdoor use or in a cast aluminum gasketed
enclosure suitable for extreme environments.
Part Number
Application
Ratio
Power
(CW/SSB)
Enclosure
DXE-BAL050-H05-A
Dipole, Yagi
1:1
2/5 kW
Formed Aluminum
$99.95
DXE-BAL050-H10-A
Dipole, Yagi
1:1
5/10 kW
Formed Aluminum
$109.95
DXE-BAL050-H11-C
Dipole, Yagi
1:1
10/10+ kW
Cast Aluminum
$139.95
DXE-BAL100-H11-C
Vertical Loop
2:1
10/10+ kW
Cast Aluminum
$149.95
DXE-BAL200-H10-A
Yagi, LPDA,
Horizontal Loop
4:1
5/10 kW
Formed Aluminum
$119.95
DXE-BAL200-H11-C
Yagi, LPDA,
Horizontal Loop
4:1
10/10+ kW
Cast Aluminum
$144.95
DXE-BAL300-H10-A
Folded Dipole
6:1
5/10 kW
Formed Aluminum
$139.95
DXE-BAL450-H10-A
450 Ω Antenna
9:1
5/10 kW
Formed Aluminum
$139.95
DXE-BAL600-H10-A
Terminated Loop
12:1
5/10 kW
Formed Aluminum
$139.95
Price
Balun Dipole Adaptor Bracket
If you’re mounting your balun or feedline choke to a
wire dipole antenna, the Balun Dipole Adapter Kit is the
ideal solution. It suspends your balun with the antenna
and includes all necessary mounting hardware. Be sure
to use durable rope that can support the added weight;
check out the Double-Braided Polyester Rope from
Synthetic Textile Industries, found on page 60.
DXE-BDAB-1P
Balun Dipole Adapter Kit ...................................................... $24.95
DXE-BMB-4P
Special Balun Applications for Use with an Antenna Tuner
Balun Mounting
Bracket Kits
DXE-BAL050H10AT
Multi-Band Dipole
1:1
5/10 kW
Formed Aluminum
$119.95
Select from several mounting
options that match your Yagi boom,
tower leg or mast’s diameter. Each
kit contains the appropriate stainless
DXE-BMB-1P
steel clamps and hardware, plus the
aluminum bar mounting bracket. They’re the
perfect mounting method for any DX Engineering balun in a formed aluminum enclosure.
DXE-BMB-1P
Mounting Kit, with .75" to 1.5" Clamps ............................... $24.95
DXE-BMB-2P
Mounting Kit, with 1.56" to 2.25" Clamps ........................... $24.95
DXE-BMB-3P
Mounting Kit, with 2.31" to 3" Clamps ................................ $24.95
DXE-BMB-4P
Mounting Kit, Made for COMTEK Baluns ............................. $17.95
DXE-BAL050H11CT
Multi-Band Dipole
1:1
10/10+ kW
Cast Aluminum
$144.95
DXE-BAL200H10AT
Multi-Band Vertical,
Off Center-Fed Dipole
4:1
5/10 kW
Formed Aluminum
$129.95
DXE-BAL200H11CT
Multi-Band Vertical,
Off Center-Fed Dipole
4:1
10/10+ kW
Cast Aluminum
$149.95
Maxi-Core® Special Line Transformers
If you need a long low loss feedline for your HF antennas,
this pair of transformers may be able to save you some
money. Instead of running a length of expensive coax, these
transformers let you use 450 Ω ladder line as an affordable
alternative. Simply run your ladder line and connect a
transformer to each end, then connect your 50 Ω coax to each
transformer, linking your antenna to your transceiver.
More details on this cost-effective solution can be found on page 85 and at DXEngineering.com.
Cable Strain
Relief Brackets
DXE-BAL450H10-BP Special Line Transformers, Pair .......................................$299.95
Mounting your balun or choke is
only part of the equation—you
still need to make sure your
coaxial cables are secure and
free from the stress of gravity.
Our Cable Strain Relief Brackets
will help prevent the cable
from pulling from your PL-259
connector.
DXE-CSR8X-1
Cable Strain Relief Assembly,
for RG-8X Cable...................$15.50
DXE-CSR213-1
Cable Strain Relief Assembly,
for RG-213/U Cable.............$15.50
Fend off RF Interference and reduce the noise level in your 50
Ω coaxially-fed antenna system. It improves your transceiver’s
efficiency by maximizing the transmit power going to your
antenna. In addition to eliminating RFI, this current choke can
also overcome a less-than-optimal ground system.
The DXE-FCC0050-H05-A handles 2 kW and is compatible
with vertical, Yagi and log periodic antennas. It offers higher
common-mode impedance, higher power handling, and lower
loss than other chokes. The Maxi-Core® Feedline Current Choke
covers 160 to 6 meters and is an excellent way to combat poor
feedline isolation.
DXE-FCC050-H05-A Feedline Current Choke ................ $87.95
Maxi-Core® and Vertical Feedline Current Chokes
DXE-FCC050-H05-A
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Baluns, UNUNs & Chokes
Proven Products.
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Vertical Feedline
Current Choke
When quarter-wave antennas are constructed over
a good radial system, they have a feedpoint
impedance of about 36 Ω and currents are
equal between the vertical section and the
radial system. If the radial system is less than
ideal—due to short radials, too-few radials or
poor soil conductivity—the antenna system
will try to use the feedline shield as part of
the radial system. This leads to a loss in the
efficiency and a higher take-off angle. Often the
current introduced on the shield of the feedline
causes RFI at the operator position.
Placing a vertical feedline current choke (VFCC) at the
base of the quarter-wave antenna forces the currents to
equalize between the vertical section and the radial system,
even if the radial system is less than ideal. The balanced terminals of the VFCC should be
connected directly to the base of the antenna and radial plate with appropriate lengths
of low-inductance tinned copper braid.
The DX Engineering VFCC is supplied with an insulated mounting shelf to isolate the
feedline shield from ground. Purchase the optional V-Saddle Clamp for mounting the
VFCC to pipe up to 2 inches O.D.
• Equalizes vertical and ground currents
• Improves signal efficiency
• Lowers radiation angle
DXE-VFCC-H05-A Vertical Feedline Current Choke Kit, 2/5 kW, HF ................ $134.95
DXE-VFCC-H10-A Vertical Feedline Current Choke Kit, 5/10 kW, HF .............. $189.95
DXE-SSVC-2P
V-Saddle Clamp, for 1" to 2" O.D. Pipe ................................ $11.95
B4KC Current Baluns
Palstar B4KC Current Baluns
are available in both 1:1 and 4:1
ratios. They’re intended for indoor use on Lo-Z antenna
applications for center-fed wire antennas with open wire and twin lead
transmission lines. B4KC Baluns feature steatite insulators and a large
3.25" ferrite core with Teflon® 12-gauge wire. Rated up to 4,000 watts,
these are useful additions to your antenna.
PAS-B4KC-4-1
4:1 Current Balun.....................................................................$89.95
PAS-B4KC-1-1
1:1 Current Balun.....................................................................$89.95
Broadband Ferrite Balun
This balun matches your 50 Ω direct coax-fed,
hairpin/beta matched or trap tri-band Yagi
antenna. It can couple into any 50 Ω balanced system,
like dipoles, multiband doublets and beam antennas. The
BN-86 Balun handles 800 watts SSB and 1,500 watts CW, while
covering the 80 to 10 meter bands. Using stainless steel hardware, this
sturdy boom-mounted balun will give you years of reliable service.
HGN-BN-86
Broadband Ferrite Balun ...................................................... $79.95
LDG-RBA-4-1
BN-4000B Broadband Beam Current Balun
This 1:1 balun provides the proper current path between
unbalanced coax and your balanced antenna feedpoint. It’s
compatible with 50 Ω direct coax-fed, hairpin/beta matched
and trap tri-band Yagi antennas. Using ferrite beads over a
short length of coax, the BN-4000B effectively chokes the flow of
RF on the outside of your coax shield. You can use this balun from 160
meters all the way to 6 meters. It handles 2,000 watts of continuous duty.
HGN-BN-4000B
Broadband Beam Current Balun........................................ $109.95
LDG-RBA-1-1
LDG-ALK-2
RBA Series Baluns
LDG Electronics designed these baluns to let you easily connect
ladder line and long wire antennas to LDG’s automatic antenna
tuners. For more versatility, these baluns can operate without
an LDG tuner and may be used with any of your long random or
ladder line antenna projects.
LDG-RBA-4-1
4:1 Voltage Balun ....................................................................$29.95
LDG-RBA-1-1
1:1 Current Balun....................................................................$29.95
Accessories
LDG-ALK-2
Audio/Linear/Key 2-Port Switch ............................................$49.95
Visit DXEngineering.com to learn more about LDG baluns and accessories!
50 and 75 Ω Choke Baluns
Choke baluns ensure that RF does not
flow on the outside shield of feedlines,
phasing lines, etc. COMTEK SYSTEMS’
baluns feature 100 Amidon beads on a
length of RG-400 PTFE double-shielded
silver coax terminated with Silver PTFE
PL-259 UHF connectors. Assembled
baluns are covered with 3M heat shrink
tubing. RF bead kits are available if you
wish to assemble your own chokes.
COM-CFC-50
50 Ω Balun, Assembled ................................ $93.95
COM-CFC-50K
50 Ω Balun, Kit .............................................. $69.95
COM-CFC-75
75 Ω Balun, Assembled ................................ $94.95
COM-RFB-160
RF Choke Bead Kit, 160M ............................. $89.95
COM-RFB-80
RF Choke Bead Kit, 80M ............................... $84.95
COM-RFB-40
RF Choke Bead Kit, 30 and 40M .................. $67.95
COM-RFB-20
RF Choke Bead Kit, 10, 15 and 20M............. $38.95
Accessories
DXE-RADP-3
Stainless Steel Radial Plate with 20 Bolt Sets..................... $54.50
DXE-SSVC-2P
V-Saddle Clamp, Fits 1" to 2" Tube ...................................... $11.95
Permatex Neutral Cure RTV Sealant
Have you ever sealed a piece of electronic gear with ordinary RTV
sealant, only to open it later to find that the component had become
corroded? It wasn’t moisture that caused the corrosion—it was the
RTV. Ordinary RTV gives off acetic acid when it cures (that’s the vinegar
smell); it’s the acid that causes the corrosion. DX Engineering has
located a Neutral Cure RTV that is non-corrosive and safe for sealing
baluns and other electronic gear that will be out in the weather. Applies
just like “normal” RTV, dries in one hour and cures in 24 hours at 70 degrees F.
UMI-82180
Permatex Neutral Cure RTV, 3.35 oz. Tube, Black......$5.99
Hazardous, limited to domestic UPS Ground shipping only.
CQ Magazine Publications
W2FMI Understanding Baluns and Ununs
W2FMI Jerry Sevick’s compilation of balun performance and
design criteria. It offers clear explanations to prompt further
discussion of theory and applications.
CQM-SEVICKBALUNS
W2FMI Understanding
Baluns and Ununs ........................$19.95
Find More Brands, More Products and
More Specs at DXEngineering.com
• We’re constantly adding more products to make your on-air
experience better. Check back often and see what’s new.
• Want more info on anything we sell? You’ll always find
detailed specs there, as well as a comprehensive F.A.Q. section.
• Whenever possible, we post FREE downloadable instruction
manuals and stat sheets so you can better research
a product.
• There’s a ton of interesting and FREE tech
articles available. Maybe you can learn
something new?
• You can contact us through DXEngineering.com. Whether it’s
an order, tech question or friendly hello, we love hearing about
(and seeing) what you’re working on!
Antennas: Stealth & Loop
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Super Hi-Q
Loop Antennas
MFJ-1786
If you’re short on
space, but don’t
want to compromise on performance, look to MFJ’s line of
Super Hi-Q Loop Antennas. These compact
loops have a 36 inch diameter, which means
they’ll fit in apartments, attics, small lots
and RVs. The Hi-Q Loop Antennas include a
controller with auto band selection, and no
control cables are necessary.
Included with each antenna is MFJ’s “Super
Remote,” which gives you a built-in crossneedle SWR/wattmeter that lets you quickly
tune to your exact frequency. The antennas
handle 150 watts and, depending on the
model, they cover the WARC bands.
MFJ-1786
Super Hi-Q Loop Antenna with Remote, 30-10M, 120 Vac.... $419.95
MFJ-1786X
Super Hi-Q Loop Antenna with Remote, 30-10M, 220 Vac.... $419.95
MFJ-1788
Super Hi-Q Loop Antenna with Remote, 40-15M, 120 Vac.... $469.95
MFJ-1788X
Super Hi-Q Loop Antenna with Remote, 40-15M, 220 Vac.... $469.95
MFJ-57B
Mini-Loop
Antenna Kits
and Tuners
These PVC Cross Loop Antenna kits are the perfect compliment to MFJ’s 933/935C/936B
loop tuners. The 4.5 x 4.5 foot PVC cross mounts break down to fit in a suitcase or duffle
bag—making them perfect for portable multi-band operation.
MFJ-57B
Loop Antenna Kit, 20-15 Meters ................................................ $29.95
MFJ-58B
Loop Antenna Kit, 60-10 Meters ................................................ $49.95
MFJ-933
Loop Tuner, 150 Watts, 5.3-30 MHz......................................... $179.95
MFJ-935B
Loop Tuner, 150 Watts, Current Meter, 5.3-30 MHz ............... $199.95
MFJ-936B
Loop Tuner, 150 Watts,
Current/SWR/Wattmeter, 5.3-30 MHz ..................................... $249.95
Tech Support: DXEngineering.com/TechArticles
Looking for guidance on your next project? Need advice to optimize your amateur radio
operation? Ask our ham radio experts a tech question, search our huge FAQ archive, or
browse our library of technical articles.
The DXE-BAL050-H05-A 1:1 balun is shown installed with the optional DXE-UWA-KIT
Universal Wire Antenna Center-T (U.S. Patent No. 7,764,244) insulator
Auto Tuned
Stealth Antenna (ATSA)
Great for EMCOMM—Assemble and
Deploy in Minutes!
Do you live in an area where
antennas are not allowed?
DX Engineering has designed a
complete antenna system that
allows Amateur Radio operators
living under the shadow of
HOA-controlled areas to get on the
air easily. Even with a short 26 foot
wire antenna, you can typically be
on the air on all bands 40 meters
and up. With only 45 feet of wire you
can be on all bands from 80 through
10 meters! That’s because the
unique ATSA MatchBoxx™
module lets you use almost any
length wire—no more “forbidden”
lengths as with other end-fed
systems.
Most small, physically short
antennas exhibit narrow bandwidth,
limiting your operating frequency
range on the lower bands to 50 to
100 kHz with acceptable SWR. The
ATSA’s integral auto tuner always
delivers the lowest possible SWR at
any operating frequency with no operator adjustments necessary. Just change bands and
the ATSA antenna will follow you!
The very low profile Remote Tuning Unit [RTU] is easily hidden, even in small bushes
or shrubs. Just “plant” the RTU with supplied spikes and lay out the minimum length
radials. The only thing visible is the wire antenna element, which can be made from small
diameter wire for a near-zero visual impact. You can further camouflage the RTU with a
plastic boulder or other items available at most landscaping stores.
The DX Engineering ATSA system is completely self-contained; even the required 12 Vdc
power is carried by the coax. The ATSA will automatically match your coax to the antenna
at any HF frequency within seconds. The complete system includes the RTU, stainless
steel radial plate and hardware, radial wire, antennas wire, and two insulators. It’s
everything you will need to get on the air and operating right under their noses.
• Automatic bandswitching—tunes for lowest SWR
• Handles 200 watts SSB/CW
• Connect 12 Vdc power and RF through single coax feedline
DXE-ATSA-1
ATSA Multi-Band HF Antenna System................................ $489.00
DXE-SA80-AOK
Stealth Antenna 80M Tuning Coil Add-On Kit .................... $49.95
66
Antennas: Switches
Proven Products. E
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Advice.
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World-Class
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Products
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Shipped Worldwide.
Wideband Coax Switches
Manual Antenna Switches
Perfect for switching one radio between two
antennas (or two radios between one antenna),
these rugged switches offer excellent isolation and
auto-grounding of the unused terminal for extra protection.
Daiwa’s CS-2011GII has a frequency range up to 2 GHz, 50 dB of isolation at
1 GHz and an insertion loss below 1.2 dB at 1.2 GHz. Gold plated type-N connectors
make for easy installation.
The CS-201A has a frequency range up to 600 MHz, 60 dB of isolation at 600 MHz and an
insertion loss under .2 dB. This switch features SO-239 connectors.
DWA-CS-201GII
Manual Coax Switch, 2 GHz .................................................. $48.95
DWA-CS-201A
Manual Coax Switch, 600 MHz.............................................. $32.95
Maximum Performance without Compromise!
Diamond Antennas offers an extensive line of station
accessories: duplexers/triplexers, switches,
dummy loads, and lightning protection.
Maximize your installation; Diamond
Antennas has the gear to help you do it.
Part Number
Description
Price
DMN-CX210A
Wideband Coax Switch, 1,500 W Max,
DC-1000 MHz, SO-239
$49.95
DMN-CX210N
Wideband Coax Switch, 1,500 W Max,
DC-1000 MHz, Type-N Connector
$79.95
DMN-CX310A
Wideband Coax Switch, 3-Position,
DC-800 MHz, SO-239
$89.95
RCS-4 Remote Antenna Switch
Manual Antenna Switches
MFJ antenna switches have precisionmachined, low loss components for
reliable service. MFJ 1704 Antenna
Switches. Mount one of these antenna
switches and you will have more than the convenience of
instantly selecting any of four antennas or center ground
positions. They come complete with replaceable lightning
surge protection that helps to protect against distant lightninginduced surges and static. When these antenna switches are
in the center position, all connectors are disconnected and
grounded. If the switch is turned to an active connector, the
other connectors are automatically grounded. The active
connector is automatically protected with the replaceable
lightning/surge protector. MFJ antenna switches utilize heavy
cast metal construction and a ball bearing drive for smooth
switching.
Additional features include:
• Handles 2.5 kW PEP
• Extremely low SWR
• Isolation: greater than 60 dB at 30 MHz, greater than 50 dB at 500 MHz
• Negligible insertion loss
• 50 Ω Impedance
MFJ-1702
2-Position Antenna Switch........................................................ $19.95
MFJ-1702C
2-Position Antenna Switch with Grounding ............................ $39.95
MFJ-1704
4-Position Antenna Switch with Grounding ............................ $79.95
MFJ-2702
1 GHz/2 kW 2-Position Antenna Switch, SO-239 Connector; $32.95
MFJ-2702N
3 GHz/2 kW 2-Position Antenna Switch, N-Connector ........... $40.95
Long Reach Connector Pliers
Summit Racing® Long Reach Connector Pliers are handy tools to have around the shack!
They're the ideal tool for hams and radio technicians. Positioning cables and tightening
connectors in hard-to-reach places with no space can be frustrating. These long-reach
pliers with specially shaped vinyl-covered jaws can tighten PL-259 (UHF Male) and
Type-N Male connectors easily! Make your connections secure; reach where your fingers
can't with help from Long Reach Connector Pliers from Summit Racing!
Connector Long-Reach Tool, Pliers Type
The ideal tool for tightening PL-259 and type N
connectors in hard-to-reach places.
SUM-900071 ............................................................ $8.97
The Ameritron RCS-4 is a Four-Position Remote Antenna
Switch which is powered through the coax cable. The relay
switch box may be tower, mast or wall mounted—the
control console is located at your operating position. It
features bright LED indicators, a steel enclosure, 50 ms
switching time, and SO-239 connectors. It uses three
heavy-duty 10 ampere contact relays on a rugged G-10
fiberglass circuit board. The RCS-4 operates from 120 Vac
power source, and covers 1.8 to through 30 MHz at 1,500 watts.
AME-RCS-4
1.5 kW Four Position RF Switch ............. $149.95
Manual Antenna Switches
Alpha Delta antenna switches have precisionmachined, low loss components for reliable service.
Grounded unselected antenna ports and ARC-PLUG™
lightning surge protectors provide the final line of
protection.
ALF-DELTA-2B
2-Position Coax Switch, SO-239 Connector ........................ $59.95
ALF-DELTA-2B-N
2-Position Coax Switch, N-Connector ................................. $75.95
ALF-DELTA-4B
4-Position Coax Switch, SO-239 Connector ........................ $89.95
ALF-DELTA-4B-N
4-Position Coax Switch, N-Connector ................................. $99.95
ALF-ASC-4B
4-Position Desk Console Switch, SO-239 Connector........ $149.95
ALF-ASC-4B-N
4-Position Desk Console Switch, N-Connector ................. $159.95
ALF-D4
Replacement ARC-PLUG ......................................................... $9.95
Tech Support: DXEngineering.com/TechArticles
Looking for guidance on your next project? Need advice to optimize your amateur radio
operation? Ask our ham radio experts a tech question, search our huge FAQ archive, or
browse our library of technical articles.
Controlling a Stacked Yagi Array using the DXE-RR8B-SD or -HP Remote Antenna Switch
techarticles/antennaconstruction/controlling-a-stacked-yagi-array
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