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DX Engineering DXE-DVA-160B-P Manual

Dual vertical phased array system for 10/12/15/17/20/30/40/60/80/160 meters
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Dual Vertical Phased Array
DXE-DVA-B
DXE-DVA-160B-P - Dual Vertical Array system for 160 meters
DXE-DVA-80B-P - Dual Vertical Array system for 80 meters
DXE-DVA-60B-P - Dual Vertical Array system for 60 meters
DXE-DVA-40B-P - Dual Vertical Array system for 40 meters
DXE-DVA-30B-P - Dual Vertical Array system for 30 meters
DXE-DVA-20B-P - Dual Vertical Array system for 20 meters
DXE-DVA-17B-P - Dual Vertical Array system for 17 meters
DXE-DVA-15B-P - Dual Vertical Array system for 15 meters
DXE-DVA-12B-P - Dual Vertical Array system for 12 meters
DXE-DVA-10B-P - Dual Vertical Array system for 10 meters
DXE-DVA-B-INS Revision 1
© DX Engineering 2017
1200 Southeast Ave. - Tallmadge, OH 44278 USA
Phone: (800) 777-0703 ∙ Tech Support and International: (330) 572-3200
Fax: (330) 572-3279 ∙ E-mail:
DXEngineering@DXEngineering.com

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Summary of Contents for DX Engineering DXE-DVA-160B-P

  • Page 1 Dual Vertical Phased Array DXE-DVA-B DXE-DVA-160B-P - Dual Vertical Array system for 160 meters DXE-DVA-80B-P - Dual Vertical Array system for 80 meters DXE-DVA-60B-P - Dual Vertical Array system for 60 meters DXE-DVA-40B-P - Dual Vertical Array system for 40 meters...

  • Page 2: Introduction And General Information

    Introduction and General Information Congratulations on your purchase of the DX Engineering Dual Vertical Phased Array System, custom designed and tested to offer the best directional transmitting and receiving performance in proportion to the space required. Advanced design, with a stable, clean and low-angle pattern makes the DX Engineering Dual Vertical Phased Array (DVA) the finest dual element quarter-wave monoband phased antenna system available.
  • Page 3 DVA systems require the 75-ohm antenna feed cables to be electrically tuned to one-quarter wavelength. Offered by DX Engineering as an option, these custom built PL-259 terminated cable assemblies use the highest quality waterproof polyethylene jacket direct-burial DXE-11U low-loss foam coax.

  • Page 4: Parts Included

    DX Engineering DVA - Dual Vertical Array System Features The Dual Vertical Array System is a monoband two element, three direction-switchable array based on a two element end-fire/broadside combination of identical vertical elements. This antenna array system is capable of delivering pattern directional performance superior to other systems in its class.

  • Page 5: Manual Updates

    Every effort is made to supply the latest manual revision with each product. Occasionally a manual will be updated between the time your DX Engineering product is shipped and when you receive it. Please check the DX Engineering web site (www.dxengineering.com) for the latest revision manual.

  • Page 6: Installation

    leave. Additional weatherproofing protection may be used on the coaxial connections. WARNING! INSTALLATION OF ANY ANTENNAS NEAR POWER LINES IS DANGEROUS Warning: Do not locate the antennas near overhead power lines or other electric light or power circuits, or where they can come into contact with such circuits. When installing the antennas, take extreme care not to come into contact with such circuits, because they may cause serious injury or death.
  • Page 7 be taken to make the elements symmetrical. Elements must be similar or identical in construction and grounding. Elements should be mounted above any standing water, but as close to the ground as possible. In general, the system will not be affected by trees or foliage so long as the foliage is not near an element.
  • Page 8 Monoband Antennas for a Dual Vertical Array System The following are some suggested DX Engineering and COMTEK full size quarter-wave monoband vertical antennas are an ideal match for top performance in a dual vertical array system. You’ll need 2 verticals.
  • Page 9 The Dual Monoband Vertical Antenna Layout The two full size quarter-wave monoband vertical antennas making up the dual vertical array system must be properly positioned. The example on the right shows a typical set up where antenna 1 is toward the NE and antenna 2 is toward the SW.
  • Page 10 The following chart shows various calculations depending on the desired center frequency. The frequencies shown here are various CW, DX, and SSB frequencies used in the ARRL Band Plan for the United States: Distance between antennas Typical Center Band (1/4-wavelength - free space) Frequency at the Center Frequency (Meters)
  • Page 11 The DXE-RADP-3 stainless steel Radial Plate contains enough stainless hardware sets to attach 20 radials. Additional 20 set radial connection hardware kits DXE-RADP- HW1K are available from DX Engineering. DXE-RADW - Radial Wire Kits and Components contain everything you need to make your own radials, including steel or biodegradable lawn staples to hold the wire down, are also available.
  • Page 12 PTFE insulation. The connector has very low loss and high electrical break down. It comes with the hardware to secure it to the DX Engineering Radial Plate and ensures the radial ground system, antenna ground and the feedline shield are common. The optional DXE-FP-WIRE-P Feedpoint Wire Connector Assembly is a perfect solution to connect the feedline to the vertical element.
  • Page 13 Using enough staples will ensure the wires will not be snagged by mowers, people, or animals. Grass will quickly overgrow the radials and they will be virtually impossible to see or cause trouble. An article describing this process is available the DX Engineering website www.dxengineering.com in the Tech Info section.
  • Page 14 Dual Vertical Array Control Console The DXE-EC-DVA is the 3 position controller used to control the DX Engineering Dual Vertical Array systems (DXE-DVA series). The DXE-EC-DVA offers the following features: ...
  • Page 15 Front and Rear Panels On/Off toggle switch Control Wire Feed Through Three Green LEDs Power Connection 3 Position Rotary Switch The DC Input used is +12 to +13.8 Vdc. A 2.1 mm power cord is supplied with unit. The wire with the white stripes is the +12 to +13.8 Vdc.
  • Page 16 20 AWG stranded copper conductors. Your color code may vary. When connecting the control cable to the DX Engineering Dual Vertical Array system, ensure your cable is wired the same way at both ends to avoid un-necessary troubleshooting (G to G, 1 to 1 and 2 to 2).
  • Page 17 The feedline from the Transmitter to the DVA Phasing Relay Unit must be good quality 50 Ω coaxial cable such as the DXE-400MAX or DXE- 213U Coaxial Cable. See the DX Engineering web site for details on the coaxial cable and cable assemblies available from DX Engineering.
  • Page 18 Consult lightning protection and station grounding information in the ARRL handbooks, or by referring to the NEC (National Electric Code). The DX Engineering website has technical and product information listed under “Lightning Protection and Grounding” on the DX Engineering web site.
  • Page 19 Typical EZNEC DX Engineering Dual Vertical Array Plots - 19 -...

  • Page 20: Troubleshooting

    Troubleshooting There are several possible causes for a malfunction. Testing the system is not difficult. Directional switching and antenna phasing can each be affected by a variety of cabling, connection and or component problems. If you are troubleshooting a new system check that the wiring from the Control Console to the Array Relay Unit is correct and no damage has been done to the lines.
  • Page 21 A new DVA Control Console (DXE-EC-DVA) is available from DX Engineering. Continue troubleshooting the array control with a good DVA Control Console or by using a 1A fused power source.
  • Page 22 At this point, the problem in your system should have been identified. If you need additional assistance from DX Engineering, feel free to call or write. Detailed discussions of system function, connections, and troubleshooting is best handled by telephone, Monday through Friday, 8:30 am to 4:30 pm Eastern Time, at 330-572-3200.
  • Page 23 The green arrows point to the readings (46 + j 12 ohms) at the selected 7.150 MHz. The SWR of 1.3 is not the SWR dip. This is the expected value at the target frequency regardless of the band. The SWR dip well above array selected frequency is normal. Remember, the goal is 46 n+ j 12 ohms at the desired frequency.

  • Page 24: Technical Support

    All products manufactured by DX Engineering are warranted to be free from defects in material and workmanship for a period of one (1) year from date of shipment. DX Engineering’s sole obligation under these warranties shall be to issue credit, repair or replace any item or part thereof which is proved to be other than as warranted; no allowance shall be made for any labor charges of Buyer for replacement of parts, adjustment or repairs, or any other work, unless such charges are authorized in advance by DX Engineering.

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