106 Receiving 2-Port Receiving Antenna Switch Select one of two output ports (generally connected to dif erent receiving antennas) from one feedline using the DXE-RLS-2. Install the DXE-RLS-2 with two DXE-RBSA-1A Reversible Beverage Antenna Systems and select four directions using a single main feedline. Install one or more DXE-RLS-2 switches 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 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 ......................................................$115.99 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 160, 80 and 40M 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 18VDC 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 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 with F connectors • Metal housings used for superior shielding and improved life DXE-RBSA-1P Reversible Beverage Feed System ..................................... $309.98 DXE-TB-5P Tilt Base for DXE-RBSA-1P .....................................................$24.49 DXE-TB-5P Time Variable Sequence Unit Protect your active antennas, transmit/ receive relays and other equipment with this sequence unit. You get full control of the timing between your radio and your amplifier. This microprocessor-controlled unit provides 0-30 milliseconds of delay, in 2 millisecond increments to as many as 5 outputs that are initiated by your CW keying or external PTT footswitch or hand switch, not by the radio. The device has a built-in side tone generator for CW. Which means you can listen to what you’re keying while it’s being held in the bucket brigade delay for transmit af er the programmed delay. This side tone is adjustable from 300 to 000 Hz in 50 Hz steps. The unit supports full break-in CW and requires 13.8VDC. It also allows you to use DX Engineering’s Active Receive Antennas in close proximity to your transmit antennas. DXE-TVSU-1B Time Variable Sequence Unit .............................................$319.99 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 F connector. DX Engineering sells quality 75 Ω coax and 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, with One Resistor........................ $115.99 DXE-ECM-R470-2 470 Ω, 2 Watt Resistor, Lightning Damage-Resistant, Pack of 10 ...............................................................................$31.99 DXE-BFS-1 High CMI Receive Feedline Chokes The result of ongoing research by the DX Engineering team, these receive feedline chokes achieve exceptionally high isolation between the input and output connector shields to ef ectively block common-mode RF noise and unwanted signals that collect on 50 and 75 Ω receive antenna feedlines. They cover the RF frequency range 100 kHz through 30 MHz and exhibit extremely high common-mode impedance (CMI) typically over 7,500 Ω across the 160, 80, and 40 meter bands. Suitable for use on bias-tee fed active receive antennas and array feedlines, these chokes feature DC pass capability up to 700mA at 13.8VDC, with extremely low SWR and negligible insertion loss. Chokes are available for 75 Ω Type-F female (DXE-RXFC-75) and 50 Ω BNC female (DXE-RXFC-50). Non-UHF connector types are used to prevent accidental connections to transmitting equipment. Built into a permanently sealed plastic box to protect components, these chokes have non-directional Input and Output connectors on opposite sides. The top and bottom each have 7/16" flanges with 3/16" holes for #10 mounting hardware (not included). Important: Receive feedline chokes cannot be used on the output of a transceiver. Transmitted RF energy will cause permanent damage. Enter “RXFC” at DXEngineering.com for more details. DXE-RXFC-75 High CMI Receive 75 Ω Feedline Choke, Type-F Female ..... $59.99 DXE-RXFC-50 High CMI Receive 50 Ω Feedline Choke, BNC Female ......... $64.95 Bi-Directional Beverage Antennas Here’s an af ordable and ef ective option for improving your low-band DXing capabilities. Available in versions with either one or two connectors, these 0.1-30 MHz bi-directional Beverage antennas from QRO.cz of er fast and easy setup; good low-noise performance; directional ef ect in two directions; protection against electrostatic charges, over-voltages, and over-currents; IP56-rated housing for moisture protection; a grounded "terminator box" with inputs and outputs clearly labeled for simplified deployment; feedline impedance of 50 or 70 Ω; and SO-239 connectors. Users attach two parallel antenna wires (not included) between the feeder and terminator box via the device’s screw terminals. Since the antenna can be set up close to the ground at a height of 1.5'-13', it is ideally suited for use on Field Day and for other portable operations. In the one-connection version (BEV21), the direction of the received signal is switched by 12VDC remote power supply (e.g., by means of the QRO.cz Bias Tee Box, see below) via the coaxial cable from the receiver side to the feeder box. With the two-connector version (BEV22), two individual receivers can be connected (i.e., one receiver per receiving direction). If only one receiver is connected, the free output must be terminated by dummy load. QRO-BEV21 BEV21 Bi-Directional Beverage, 1 Connector....................$133.99 QRO-BEV22 BEV22 Bi-Directional Beverage, 2 Connectors ..................$133.99 Bias Tee Box This feed splitter with PL jacks for shortwave and 6M is used to feed DC current into an RF signal to power remote antenna amplifiers or other equipment. It is usually positioned at the receiving end of the coaxial cable to pass DC power from an external source to the coaxial cable leading to the operated equipment. The device consists of a feed inductor that supplies DC current to a terminal on the equipment end, and a blocking capacitor that prevents DC current from passing to the receiver. An LED light provides information on the operating status. In addition, the IP56-rated box features an adjustable attenuator and protection against overvoltage and overcurrent. QRO-BTBOX Bias Tee Box, 0.1-60 MHz .......................................................$77.99 RX Preamplifier Boxes Based on a W7IUV design, these 0.1-30 MHz RX Preamplifier Boxes with 2N5109 transistor can be used as a high IP preamplifier for RX antennas (Beverage, DHDL, flag, et. al.). The unit’s variable ATT allows users to set the gain from 0-18 dB. Further, the right transistor bias can be set by use of the preamplifier’s multi-turn potentiometer. Two relays of er bypass switching if there is no power supply voltage. Use the external power supply connected to the box or the Bias Tee Box for power over the coax. Preamplifier boxes come with or without Bias Tee Box. Other features include front-end diode protection, high-quality connectors, and IP56-rated enclosure. QRO-RXABOX RX Preamplifier Box, 2N5109 SMD ......................................$114.99 QRO-RXABOX-BT RX Preamplifier Box, 2N5109 SMD w/ Bias Tee Box ..........$218.99 Prices are subject to change without notice.
