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Receive Antennas and Arrays
DX Engineering Receiver Guard Electronic RF Limiters
DX Engineering Receiver Guard RG5000HD Electronic RF Limiters are the best choice of inline devices to protect your receiver antenna inputs. The Receiver Guard is a receive antenna input limiter specifically designed to protect a sensitive receiver front-end against high levels of RF and potential damage. At the heart of each Receiver Guard is a highly effective electronic RF limiter covering 500 kHz to 150 MHz with an insertion loss under 0.15 dB up to 50 MHz and under 0.30 dB up to 150 MHz. The multi-stage design includes a gas discharge tube for maximum pulse energy protection. The DXE-RG5000HD rejects 10 watts of catastrophic receive antenna feedline RF while passing a maximum signal of about 87 dB over S-9, which is only 25 mw, a signal level that is well below the point of front end damage. Receiver Guards are a must for multiple radio contesting stations and they provide low-cost front-end "insurance." Use them in these common high-RF situations: - Receive antennas in very close proximity to transmit antennas - Field-day operations with many transmitters in close range - Multi-transmitter contesting sites - Neighboring Amateur and CB operators - Frequent high-power mobile encounters Extensively tested and proven in real-world stations, the Receiver Guard works for all radios and offers the ultimate performance required by the upper tier of transceivers tested to have the best narrow-spaced third-order dynamic range or published RMDR (Reciprocal Mixing Dynamic Range). These are passive electronic limiters, so competitive contesting stations use separate band filters in addition to the Receiver Guard. When there are high levels of RF on your receive antennas, the DX Engineering Receiver Guard generates far less harmonic noise than other limiters on the market, which allows your station to continue to operate safely and competitively. At normal HF signal levels the RG5000HD operates continuously with no effect on the performance of your station while providing the best possible protection for your radio. Here are key Receiver Guard features: * Keeps stray high levels of RF from damaging your receiver input * Ideal for separate 160 and/or 80 meter receive systems with large pulse and RF energy capture area * Uses state of the art components for maximum protection of receivers * Under 6 ns response time * Multi-Stage protection * Very low insertion loss * Uses BNC type connectors to avoid accidental connection to a transmit feedline * Has been developed and tested in world-recognized multi-multi contest station K3LR Specifications - DX Engineering Receiver Guard model DXE-RG-5000HD - Frequency Range: 0.5 through 150 MHz - Insertion Loss: < 0.15 dB up to 50 MHz, < 0.3 dB 50 MHz up to 150 MHz - VSWR: < 1.2:1 - Maximum Output Level at 10 W input: +14 dBm (0.025 W) - Maximum Power Handling: 10 W CCS (Continuous Commercial Service) - Device Impedance: 50 to 75 ohms, unbalanced - Connectors, Input and Output: BNC female Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. What happens if the receive antenna is extremely close to the transmit antenna, or there is an antenna support or other system failure that causes a high RF level to enter the receive antenna input? A DX Engineering Receiver Guard can save the day! Order yours now.
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$105.99
DX Engineering Receive Short Element Active Vertical Antennas
DX Engineering Receive Short Element Active Vertical Antennas (the RSEAV Antennas) offer excellent low noise radio frequency reception from 40 kHz to 30 MHz. Better receiving performance than full-size transmit antennas and other active makes the DXE-RSEAV-1 the best choice on the market for VLF through HF reception, including long-distance AM broadcast, Medium Wave and Shortwave (SWL), and new low-frequency Amateur bands, DXing, contesting, and everyday HF operations. Click on a listed product title and Scroll Down to see additional important information. A complete product description appears below the Specifications Overview. Instruction manual links appear in the Documentation section. The sleek and stealthy DXE-RSEAV-1 includes a high-quality three-section 8.5 ft. (2.6m) aluminum tubing whip, insulated mounting plate and the completely new DXE-AVA-3 Active Matching Unit. Its state-of-the-art broadband operational amplifier design works as a high-impedance buffer between the short antenna element and RG6U 75-ohm coax. When installed in the appropriate location, RSEAV antennas provide significantly better weak signal reception than other active receive antennas and full-size transmit-capable antennas, with substantially reduced noise and lower spurious signal interference. Receive Short Element Active Vertical Antennas are intended to be mounted on a ground rod at ground level in a clear area away from all metal, towers and other antennas. They are sold individually (DXE-RSEAV-1), or with a bias tee (DXE-RSEAV-1FVI) and DXE-RSEAV-1 Receive Short Element Active Verticals set a new standard for "Active Receive Vertical Antennas" replacing legacy DXE-ARAV-3, ARAV-2, ARAV-1 and AL-24 versions. Use multiple DXE-RSEAV-1 for all 4 and 8 element DX Engineering Receive Arrays – all 3, 4 and 8 element Hi-Z Antennas Arrays – and 2 element receive arrays with DXE-NCC-2 and NCC-1 Variable Phasing Controllers. The DXE-RSEAV-1 is designed to be a very low-gain, low-noise antenna for greatly improved signal-to-noise performance over a very wide range of frequencies. In a proper single or multi-element array installation, this Receive Vertical antenna will attenuate high-angle skywave signals, which is the goal for a low band DXing receive antenna. Low-angle, long-range DX signals are easier to copy with a good radio and DX Engineering Receive Short Element Active Vertical Antennas. Please Note: To achieve the expected reception pattern, multi-element phased arrays depend upon identical gain and phase response from each element. Every individual element amplifier, its grounding, and even its feedline characteristics and length, must be identical to the others in the array. Therefore, when unrepairable failures occur, it is essential to replace or upgrade all the elements in the array with identical, fully compatible DXE-RSEAV-1 antennas or DXE-AVA-3 units.
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$249.99
WiMo QRM Eliminator
The WiMo QRM Eliminator is a simple signal phasing device that can effectively reduce or remove noise interference for dramatically improved reception from 3.5 to 60 MHz. The QRM Eliminator is based on a totally innovative concept and cannot be compared to the performance of noise blanker or DSP circuits. Removing the noise before it gets to the receiver is the superior method of interference reduction. With the WiMo QRM Eliminator you can get rid of local interference almost entirely, up to an S9 level, with the likely result of completely clear reception! You don't have to understand the cause or type of interference nor do you need to know the location of its source. It doesn't matter if the interference originates from your own station or from a welding unit hundreds of feet away. The QRM Eliminator simply connects to the antenna port of transceiver and to the antenna (or amplifier input), without any radio modifications required. An additional user supplied auxiliary receiving antenna is required, such as a properly positioned 8 ft. outdoor dipole antenna or a simple 20 ft. wire in the shack, for example. This "noise sense" antenna receives mostly unwanted signal, while the transmitting antenna receives the same interference in a different phase along with the desired signal. The QRM Eliminator allows the adjustment of the amplification and phase to cancel out the unwanted signal before it reaches the receiver front end! Noise or interference nulling can provide over 45 dB of unwanted signal suppression, in many cases resulting in clear reception of the desired signal. The QRM Eliminator is built into a shielded metal enclosure, functions over the frequency range of 3.5 through 60 MHz, and has a status LED to indicate when the unit is turned on for phasing. The unit has a built-in T/R relay with PTT control via a rear panel RCA phono connector for the transceiver amplifier keying line. The QRM Eliminator automatically switches the Main antenna connection to the transceiver during transmit. Also, simply turn the unit off to bypass the phasing unit for normal reception on the Main transmit antenna. Click "More Detail" below to see additional information about this exciting device. You may not believe the power of interference phase nulling until you have experienced it for yourself. Order the WiMo QRM Eliminator exclusively in North America from DX Engineering.
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$229.99
DX Engineering AVA-3 Active Matching Units
DX Engineering AVA-3 Active Matching Units are state-of-the-art broadband receive RF operational amplifiers that achieve unparalleled weak signal reception across the radio frequency range from 40 kHz* to 30 MHz. They work as a high impedance buffer between a short antenna element of 6 to 24 feet and an economical 75 ohm feedline. The AVA-3 and a short element are intended to be mounted on a ground rod at ground level in a clear area away from all metal, towers and other antennas. The gain adjustable AVA-3 is the sole upgrade and drop-in replacement for all discontinued receive array element amplifiers including Hi-Z Antennas AMP, PLUS6-AMP, AMP-V2 and AMP-PLUS-V2 as well as DXE-AVA-2 and AVA-1. The DXE-AVA-3 Active Matching Unit is the heart of the new line of DX Engineering Receive Short Element Active Vertical Antennas, DXE-RSEAV-1. Compared to large antennas, this amplified short element method dramatically improves signal-to-noise performance for excellent VLF, LF and HF weak signal reception. Click or tap the title of the listed item for an overview - a complete description, Specifications, Required and Suggested Parts. Links to instruction manuals and charts appear in Documentation. The AVA-3 Active Matching Unit provides these features and benefits: • Ultimate frequency coverage of 40 kHz* to 30 MHz for VLF through HF (including the 2200m and 630m Amateur bands) • High Third Order Intercept (TOI) Performance +39dBm for superior strong signal handling equal to top transceivers • Consistent unit to unit gain for greatly improved array performance • Virtually Flat Gain (+/-0.4 dBm) across the entire frequency range • Internally settable gain (default -6, 0, or +6 dBm) for different ambient noise locations and element sizes • Direct DC via second F connector – internal settable choice for separate DC and RF coaxial cables for best performance, or standard Bias Tee DC on the RF coax • Each DXE-AVA-3 Active Matching Unit operates on 12 -15 VDC at 25mA • Element is grounded when power is removed • 75 ohm F connectors support field serviceable RG-6 Quad Shield suitable up to 1,000 feet for VLF through HF *Frequency coverage below 200 kHz requires Direct DC on a separate DC only coaxial cable. Please Note: To achieve the expected reception pattern, multi-element phased arrays depend upon identical gain and phase response from each element. Every individual element amplifier, its grounding, and even its feedline characteristics and length, must be identical to the others in the array. Therefore, when unrepairable failures occur, it is essential to replace and upgrade all the element amplifiers in the array with fully compatible DXE-AVA-3 units.
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$139.99
DX Engineering NOISELOOP Portable Receive Flag Antenna Kit
DX Engineering NOISELOOP Portable Receive Flag Antenna Kit is based on the design by Don Kirk, WD8DSB. Don's article on this antenna is published in the March 2021 issue of QST Magazine (used by permission). The DXE-NOISELOOP is a kit of parts to build this receive-only portable directional HF loop antenna, which measures only 48 by 24 inches plus 36 inches of mast-handle. It may be used while walking or stationary with your portable HF receiver. Oriented vertically, this loop antenna features a cardioid pattern at the horizon with a deep null of up to 30 dB rejection. It is an excellent tool for locating noise sources from 1.8 through 30 MHz and for low-noise, general coverage reception from the AM broadcast band through 30 MHz. An optional Preamplifier-Attenuator Unit, DXE-NL-PRE-ATT-1, may be attached to the loop mast handle for enhanced operations. An IC-705, a portable SW or a handheld HF receiver are excellent choices for searching for local noise sources with the NOISELOOP, around the neighborhood and even around your own home. This Portable Flag Antenna Kit includes everything needed to make the antenna: fiberglass tubing for the frame and handle, mounting plate, separate PC boards for the bifilar wound transformer and load resistor, antenna wire, coaxial cable with male BNC and stainless steel hardware. Simple hand tools and a solder iron are required for assembly. Included instructions detail assembly. This kit will typically take between 1 and 2 hours to build. The WD8DSB Portable Flag Antenna design has become a real game changer in direction finding of RFI on MF and HF frequencies, and you will also find it an invaluable tool when hunting RFI due to the following key features. *Unidirectional (unlike a tuned loop) *Broadband (unlike a tuned loop, excellent for AM DXing, SWL and Amateur) *Portable (easy to walk with while directional noise finding or HF Fox Hunting) Traditionally Flag antennas are large and designed for stationary use, but the idea for this antenna was to design a Portable Flag. It was designed to be the largest possible (to maximize gain) that would fit inside a car and it's still small enough to maintain a cardioid pattern up through 30 MHz. The portable Flag has an approximate dimension of 2 feet tall by 4 feet long which you (or a helper) can easily walk with while tracking down a signal. Unlike a tuned loop, the Portable Flag is a broadband antenna with unidirectional properties, and it's designed for direction finding from 1.8 to 30 MHz as long as an appropriate preamp is used. It's even useful for direction finding down in the AM broadcast band. The rear of the antenna produces a sharp null when pointed at the signal of interest and the sharp null is often used for direction finding versus using the broad peak which occurs when the front of the antenna is pointed at the signal of interest. Learn more about how to build this antenna kit by clicking on More Detail and the Documentation link for the Instruction Manual. Order your DX Engineering NOISELOOP Portable Receive Flag Antenna Kit here.
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$159.99
DX Engineering Beverage Antenna Systems
DX Engineering Beverage Antenna Systems are single-wire, single-direction beverage feed systems. Their W8JI design makes them immune to the strong signal overload and core saturation common in multi-transmitter contesting environments. They are used by winning contest stations and low-band DXers. They use an isolated-winding matching-transformer system to significantly increase the signal-to-noise ratio in Beverage and other high-impedance antennas. Now RoHS-compliant, they will work with antenna impedances from 400-500 ohms. The termination resistor included is a special 470 ohm, 2 watt, non-inductive resistor that withstands nearby lightning strikes significantly better than hard-to-find carbon composition resistors. Features include: * 100 kHz to 30 MHz operating range * Spark gaps minimize damage from lightning * Wing nut terminals eliminate soldering * Rugged aluminum housing and stainless steel hardware * Flange-mount holes for easy mounting * Ground isolated secondary can be connected with normal or reverse phase Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Beverage antennas have been in use since the 1920s. These DX Engineering Beverage Antenna Systems modernize the Beverage concept for convenience and performance.
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$115.99
DX Engineering 2-Port Splitter-Combiners
DX Engineering 2-Port Splitter-Combiners are receive signal-level RF devices that operate from 300 kHz to 30 MHz, available in 50 ohm and 75 ohm versions. They're typically used to split one RF signal to properly feed two receivers, or the receive antenna inputs of one transceiver and one separate receiver. They also properly combine two receiving antennas in phase, such as Beverage antennas, to form a phased receive array. Important features of the DX Engineering 2-Port Splitter-Combiner: * Available for 50 ohm and 75 ohm systems * Broad, 300 kHz through 30 MHz operating range * High-quality components * Isolated ports * Metal housing for superior shielding and longer life * Reliable side-mount connectors: BNC female for 50 ohm, F female connectors for 75 ohm model * Economical solution to potential impedance errors that cause losses With the updated "SC" versions of the original 2-Port Splitter-Combiner, DX Engineering has maintained the port isolation design that prevents signal performance degradation caused by impedance errors in less-than-perfect receive systems. The normal signal level reduction when used as a splitter is just over 3 dB per port. As with any system, losses are dependent upon source and load impedances being matched. DX Engineering Splitter-Combiners provide equal power, voltage, and current to matched loads on ports 1 and 2. The primary advantage is that individual receiver input variations, or a band filter attached to only one port, will not seriously affect the signal level in the other receiver. In addition, any spurious signals generated in one receiver are greatly attenuated by the 2-Port Splitter-Combiner before reaching the second receiver. When splitting in-phase signals, the loss is somewhat less. Any unused port of the 2-Port Splitter-Combiner should be terminated and specified losses are based on source and load impedances being matched. The DX Engineering 2-Port Splitter-Combiner is a passive device; therefore it requires no power to operate. Use the 75-ohm version for combining two 75 ohm antenna feedlines into a single 75 ohm feedline with negligible loss; or use the 50-ohm version for 50-ohm antennas and feedlines. Examples for applications are for two antennas forming an in-phase (broadside) receiving array, a cross-fire Echelon Beverage array, or any type of array with fixed phasing. There are a number of advantages to using these units for combining antenna systems over a standard parallel connection: * Splitter-Combiners match the entire antenna system to the feedline impedance; conversely, paralleling feedlines by using a T-connector divides the impedance in half, causing mismatched losses * 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 2-Port Splitter-Combiner, only the problem antenna is unusable; the antenna on the other port can still be used * Unlike quarter wave matching sections that only work on one band, these Splitter-Combiners have extremely wide bandwidth * Due to the built-in isolation and balancing, these units limit the signal loss to approximately 3 dB per port * 2-Port Splitter-Combiners provide very high isolation between ports 1 and 2; this prevents either antenna from interfering with the other during normal operation Note: These devices cannot be used for FM broadcast, VHF, UHF, CATV or Satellite TV. They operate only MF through HF. Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information.
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$100.99
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$107.99
Moonraker X1 HF Vertical Receive Antennas
Moonraker X1 HF Vertical Receive Antennas are ideal for those who want to listen to shortwave but have limited space to erect larger antennas. This antenna features helical wound, internally loaded wire traps that are a great alternative to a long wire and the RX capabilities range from 1-50 MHz without the need for radials. This antenna is easy to assemble and comes ready to mount to any mast up to 1.50 in. (not included). Additional Features and Specifications: * Antenna Height: 6.562 ft. (200cm) * Antenna Connector: UHF SO-239 * Mast Clamps (included) * RG-58 Coax Cable Assembly: 32.808 ft. (10 M) PL-259 to SMA (included)
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$219.99
Unified Microsystems RAS-4 Receive Antenna Switch
Unified Microsystems RAS-4 Receive Antenna Switch is an outdoor capable remote relay unit that allows the operator to select up to four antennas. Receive only antennas are critical for success on the low bands. Due to the wavelengths of the low bands, these antennas cannot be rotated. Several very effective receive only antennas are mono-directional or bi-directional, including Beverage, Reversible Beverage, Beverage on the Ground (BOG), Reversible Beverage on the Ground (RBOG) and many others,. Therefore, a high quality, low noise four port receive antenna switch is required to cover all of the directions with multiple antennas. Common mode noise pick up can ruin the performance of receive antenna systems, so the RAS-4 isolates both the center conductor and shield of unselected ports. An internal bifilar ferrite choke further reduces common mode currents. This unit features female F connectors for RG6U coax with male F connectors, the standard field-serviceable coaxial cable assemblies for receive antenna systems. A very important requirement for dual feedline Reversible Beverage and RBOG antennas is provided by the RAS-4. By default, unselected ports are terminated for 75 ohms. The user can change to 50 ohm, open circuit, or center conductor-shield short by soldering wire jumpers. The RAS-4 is housed in a NEMA rated enclosure with a gasket lid. A cable gland seals the control cable entry. The internal circuit board has a conformal coating for additional protection. The RAS-4 can be mounted outdoors, with the enclosure flanges or with the included L bracket for mounting to a pole or post. The RAS-4 Receive Antenna Switch is a receive-only relay unit that cannot be used for transmitting antennas. The required in-shack control console switch is not included. The RAS-4 will work with a commercial or a simple home brewed, positive 12V One-of-Four switch. Choose from DX Engineering, EA4TX and others for manual or automated switching. Unified Microsystems RAS-4 Receive Antenna Switch Specifications Antenna Selection: 4 receive antennas to 1 main feedline Dimensions: Approx. 4.5 x 3.5 x 3.25 in. (11.4 x 8.9 x 8.3 cm), not including the bracket. Connector type: F (5 total) Unselected port termination: 75 ohm default; 50 ohm; open; shorted. Wire jumper selectable VSWR: < 1.5:1 from 100 kHz to 20 MHz Insertion loss: < 0.4dB from 100 kHz to 20 MHz Port to Port Isolation: > 45dB from 100 kHz to 20 MHz Control Cable: 3 wire plus ground (4 total conductors), Not included Switch Controller: 12 to 14 Vdc, Not included
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$124.95
DX Engineering RF PRO Loop Replacement Components
Since DX Engineering manufactures the RF-PRO-1B® Active Magnetic Loop Receive Antenna, we can offer these RF PRO Loop Replacement Components. Available for refurbishing Pixel, InLogis or DX Engineering Active Magnetic Loops, choose one or more of these individual "Original Equipment" components, component set or handy accessory pack that fills your needs. 1. DXE-RFPRO1B-PA Receive Preamplifier has this new part number for the preamp unit only. This is the weatherproof, metal-encased replacement RF PRO 1B Receive Preamplifier that mounts directly onto the loop bracket. Mounting hardware is not included with this replacement low-noise preamp, but it is available in the… 2. DXE-RFPRO1B-OAP Outdoor Accessory Pack. This package contains the insulated shoulder washers, flat washers and nuts to properly mount the preamp. Also included in this outdoor package for the loop installation are the mast mounting V-Bolts and Saddles and the short RG-6 F connector jumper to connect the loop to the preamp, and weather sealer. User supplied RG-6 coaxial cable is used for the long feedline that is run inside to the… 3. DXE-RFPRO1B-PI Power Inserter. This is the indoor unit that puts a well filtered and regulated 20 Vdc power onto the feedline for the preamp. It carries the loop RF to the receiver via the F connector. This unit also disables the power to the preamp when it is keyed by the transceiver amplifier keying line. The Power Inserter is run on 24 Vac from the… 4. DXE-PSW-24A-6AU AC Adapter. This clean power supply is a linear transformer that converts 120 Vac to the 24 Vac at 600 mA required by the Power Inserter. It is has the attached 2.1mm power connector. 5. DXE-RFPRO1B-IAP Indoor Accessory Pack contains the cables and adapter to connect the transceiver RF and keying lines to the Power Inserter. The F connector coaxial cable connects RF from the Inserter to the radio. A supplied F female to PL-259 adapter facilitates that connection, should you radio need it. An RCA phono patch cable is supplied for keying the Power Inserter and a RCA phono y-adapter provides the additional keying line connection for a power amplifier. 6. DXE-RF-30B Complete Component Package is for a system replacement where only an existing RF PRO 1B Loop is available. All of the above individual components, cables and hardware items listed above, items 1 through 5, but not the loop, are included in this DXE-RF-30B package. 7. DXE-PRO-LOOP is the Replacement RF PRO 1B Loop that is ordered by customers who have all other components of their system working. When your damaged or defective loop needs to be replaced, this is the loop only part to order. RF-PRO-1B® Loops may occasionally need a replacement component or hardware package. DX Engineering RF PRO Loop Replacement Components are available right here, at DX Engineering!
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$103.99
Chelegance Deshibo GA-450 Active Indoor Shortwave Loop Antenna
Chelegance Deshibo GA-450 Active Indoor Shortwave Loop Antenna – for HF receive from 2.3 to 30 MHz (SW) and AM Broadcast receive from 522 to 1710 kHz (MW). This amazing little mini-loop antenna is less than 8 in. diameter with a control base and BNC loop connector, gain control, USB-C charging port, internal battery and female BNC output. This antenna set includes male BNC-to-BNC and BNC to 3.5mm adapter cables for connection to your receiver—and a USB A to USB C cable to connect charging power from a laptop (AC adapter not included). Completely portable operation is simple with the control base charged battery and/or backup USB power source. This Active Indoor Shortwave Loop Antenna is ideal for use at home, in the camper, or RV. * SPECIFICATIONS: - Frequency range: SW 2.3-30 MHz / MW 522-1710 kHz - Impedance: 50 ohm - Antenna gain: 20 dbi - Ring diameter: 7.874 in. (20 cm) - Control box: 4.172 x 2.559 x 1.024 in. (105 x 65 x 26 mm) - Charging port: USB-C * PARTS LIST: - 1 x Receiving Loop, D-20CM, BNC - 1 x Active Antenna Box with Built-in 18350 battery - 2 x RF cables, 39 in. (1m) male BNC to 3.5mm and BNC to BNC - 1 x USB A to USB C cable
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$147.00
DX Engineering Clifton Laboratories Z10020 AM Band Filter Module
DX Engineering Clifton Laboratories Z10020 AM Band Filter Module drastically reduces RF signals in the 530 to 1700 kHz MW range while passing frequencies below and above this range with minimal attenuation. A large section of the AM Broadcast Band (BCB) is attenuated by nearly 70db with a maximum of 75dB. Response rolls off quickly above 490 kHz and below 1.8 MHz. Detailed plots demonstrate the excellent performance of this AM band receiving rejection filter. The DXE-Z10020-PM RX AM Reject Filter plug-in module is our version of the 7th Order Chebyshev design built to deliver the performance of the original Clifton Labs AM Broadcast Band (BCB) filter. It provides excellent Broadcast Interference (BCI) filtering performance for Amateur low band and commercial SW receive applications, with less than 2dB insertion loss across the 160 meter band. The DXE-Z10020-PM module can be installed in the DXE-DMC-2 Dual Module Chassis to create an inline high-performance receive-only AM Band Reject Filter. Or, install one of these versatile AM filter modules inside of the DXE-RPA-2 Receive Preamplifier or the DXE-RTR-2 Receive Antenna Interface. Two AM BCB Reject Filter modules will cover the two channels of the DXE-NCC-2 Receive Antenna Phasing Unit. The legacy built by Jack Smith, K8ZOA (SK), at Clifton Laboratories lives on with select products by DX Engineering.
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$163.99
QRO.cz RX Preamp Module Boxes
QRO.cz RX Preamp Module Boxes, featuring the 2N5109 transistor, are based on the proven W7IUV design and are ideal for use with receive-only antennas such as beverages, Double Half Delta Loops, flags, and other popular RX antenna designs. The Preamp Box offers up to 18dB of gain, with a built-in variable attenuator that allows you to easily adjust the gain to your desired level. A multi-turn potentiometer lets you fine-tune the transistor bias for optimal performance. The unit includes two relays that automatically switch to bypass mode when no power is supplied. Power can be provided either through a direct external DC connection or via a bias tee for power over coax.
Not Yet Reviewed
$123.99
Chelegance WV-601 Aluminum All Band Passive Loop Antennas
Chelegance WV-601 Aluminum All Band Passive Loop Antennas provide low noise, directional receive coverage across all frequencies from 0-999MHz. This broadband antenna is passive, meaning that it doesn't require power in order to operate, and that helps it to be low noise as it doesn't amplify both the signals that you want to hear and the noise that you don't want to hear. The WV-601 is a broadband antenna provides reception across the Long Wave (144-288KHz), Medium Wave (540-1700KHz), Short Wave (2.3-30MHz), FM Broadcast (64-108MHz), VHF Air band (118-137MHz), VHF (140-380MHz), UHF (380-512MHz) and the UHF Public Service bands (770-860MHz), as well as everything in between. In addition to the broadband receive, this loop antenna can be used for transmit on the 2m and 70cm bands at 10 watts or less. At a mere 27.6 in. in diameter, and weighing in at 4.4 lbs., this antenna doesn't require much in the way of a mast to support it and it can even be used portable should one wish to do so. This allows for use on events like Field Day or even a POTA activation. This antenna comes with: • Antenna Loop • Supporting Mast with installing accessories • 10-meter Feedline (BNC male to BNC female connector) • 1-meter Feedline (3.5 to BNC male) • 1-meter Feedline (BNC male to BNC male) • SMA Adapter • User Manual Additional Feature and Specifications: Frequency Range RX: 0 – 999MHz / TX: 144 – 148MHz & 430 – 440MHz Net Weight 2kg (antenna) / 5kg (packaged）
Not Yet Reviewed
$213.00
DX Engineering Dual Module Chassis
The DX Engineering Dual Module Chassis is the connector and power interface box for all DX Engineering and Clifton Laboratories Plug-In Modules and Receive Filters. The DXE-DMC-2 is a versatile multi-purpose DX Engineering receive device box. It can be used for two passive plug-in modules or one powered module and one passive module. It is a great way to create a wide pass filter, or protect a receiver with a filter and a limiter, or add a preamplifier that has filtering or limiter protection. Here are the modules that can internally plug into the DX Engineering Dual Module Chassis: • DXE-Z10020-PM - Clifton Laboratories Z10020 AM Band Filter Module • DXE-Z10046B-PM - Clifton Laboratories Z10046 High-Gain Preamplifiers • DXE-RG5000HD-PM - Receiver Guard 5000HD Plug-in Module (passive) • DXE-IT-PM - 75 to 50 Ohm Impedance Transformer Plug-in Module (passive) • DXE-RPA-2-PM - Receive Preamplifier Plug-in Module (powered) • DXE-RXFL-1 - Receive Filter Adapter Board, for RXFL Filters (passive) One DXE-RXFL-1 Receive Filter Adapter Board is required to install any one of the RXFL filters listed below. They fit into the DXE-DMC-2, as well as the DXE-NCC-2, DXE-RTR-2 and DXE-RPA-2. The DXE-DMC-2 can accommodate one or two filters to create the filter type and input signal band pass frequency coverage and limitations that serves your needs. NOTE: The transition from the natural aluminum to the black powder coated chassis is occurring in early 2020. There is no internal electronic difference between them. Click on more details to see how you can build the receive accessory of your desires with the DX Engineering Dual Module Chassis.
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$195.99
Chelegance Deshibo GA-800 Active Loop RX Antennas
Chelegance Deshibo GA-800 Active Loop RX Antennas covers a frequency range from 10kHz to 159Mhz, which includes the 6, 4 and 2 meter Amateur Radio bands. The GA-800 features a 10.27in. antenna loop with convenient automatic tuning, and a built-in amplifier and interference suppression. Unlike the GA-450, the GA-800 can also be operated remotely, away from domestic interference in a garden or back yard.
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$177.00
DX Engineering 2-Port Receiving Antenna Switches
DX Engineering 2-Port Receiving Antenna Switches are for receiving systems designed to allow for the selection of one of two output ports from one feedline. Typically connected to different receiving antennas, these RoHS-compliant receive antenna switches activate with the application of a control voltage injected onto the feedline of either +10-15V DC or 9-12V AC. The optional DX Engineering Feedline Voltage Coupler may be used to supply control voltages through a single main feedline. Three RLS-2 Two-Port Receiving Antenna Switches may be configured to allow control of the switching selection of four different receiving antennas. When used with two DX Engineering Reversible Beverage Systems, one of these RLS-2 units will delegate switching voltages and allow for the selection of four directions, sharing the 75 ohm feedline, and passing 500 kHz through 30 MHz receive back to the operating position. Features of DX Engineering 2-port receiving antenna switches include: * Metal housing for superior shielding and long life * High-quality components * Reliable F-type connectors * Jumper-selectable, control voltage pass-through to the activated port Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Build your special receive antenna switching system with DX Engineering 2-Port Receiving Antenna Switches!
Not Yet Reviewed
$115.99
DX Engineering Receive Filters
DX Engineering Receive Filters are available individually for use in the NCC-2, RPA-2, RTR-2 or DMC-2 with adapter boards. These filters are also available in sets with mounting fixtures for use in the NCC-1. DX Engineering Receive Filters are numbered for the key Amateur Band on which they function. The Band Pass filter models pass RF only on the numbered band, the High Pass models function on that band and all device frequencies above, and the Low Pass models work on that band and all device frequencies below. Response plots for Receive Filters are conveniently listed on a single page in this product's detail web page tab labeled "Charts and Guides". Some users will want to use a pair of these filters with two of the required DXE-RXFL-1 Filter Adapter Boards in their NCC-2. Each individual filter used requires a DXE-RXFL-1 Single Filter Adapter Board to convert them for installation in DX Engineering device models DXE-NCC-2, DXE-RPA-2, DXE-RTR-2 or DXE-DMC-2. All of the RXFL filters are still available in paired sets including two filters and one filter mounting fixture for owners of the legacy NCC-1 unit. See the Receive Filter Sets in combo packages by entering NCC-1 into the search box above.
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$101.99
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$163.99
QRO.cz Classic Dual Output 2-Wire Bi-Directional Beverage Antenna Systems
QRO.cz Classic Dual Output 2-Wire Bi-Directional Beverage Antenna Systems are designed for advanced receiving setups, particularly in contesting and multi-radio environments. This system features two SO-239 output connectors, each corresponding to a different direction. Both outputs are active simultaneously, allowing the antenna to receive signals from opposite directions at the same time. This dual-output capability makes the system ideal for SO2R (Single Operator Two Radios) and MM (Multi-Multi) operations, where multiple radios or operators need to share directional antennas efficiently. Instead of switching directions manually or electronically, this design enables real-time, dual-direction reception, enhancing flexibility and performance in competitive or complex station configurations.
Not Yet Reviewed
$143.99
DX Engineering Receive Feedline Voltage Couplers
DX Engineering FVC-1 Feedline Voltage Couplers provide an interface between control switches and voltage-controlled antenna systems. These specialized controllable bias-tee devices place 0V DC, +12V DC, -12V DC, and 12V AC output voltages onto the receive antenna feedline via the 75 ohm F connector or onto a 2-conductor control line. These FVC-1 couplers function from below 500 kHz to 30 MHz and provide four selections for switching antenna array directions or changing from one array to another. These couplers were designed for use with; the DX Engineering receive-only four-square antenna systems, reversible Beverage antenna systems, and remote switches. DX Engineering switch control consoles may be connected directly to the BCD switch control input of FVC-1 couplers. Alternatively, you may use your own 12V DC voltage switching system or 1 of 4 grounding switches to control the coupler by resetting internal jumpers. The connection of the feedline voltage couplers to any radio receive antenna input is to be made using either the standard RCA phono or the F connector. This allows for the use of readily available RF-compatible RCA phono patch cords or a 75 ohm coaxial cable and connectors, which protects your receive system from an accidental connection to transmitting equipment. FVC-1 feedline voltage couplers have two LED indicators--red and green--which indicate the presence and polarity of the output control voltage selected. The LEDs may function as directional indicators that can be read at a convenient distance or they can aid in troubleshooting. Each of our DX Engineering FVC-1 Feedline Voltage Couplers comes with a heavy duty 120V AC wall transformer, which provides a safe 12V AC to operate your receive antenna system. Here are other exclusive features of FVC-1 voltage couplers: * Metal housing--superior shielding, rugged, and easy mounting * Convenient installation--mount anywhere in your shack * Rugged control connector - a reliable, solderless, and removable connector with screw conductor clamps * Internal thermal reset fuse offers full protection against accidental shorts Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Got antenna switching voltages? DX Engineering FVC-1 Feedline Voltage Couplers will solve many switching needs easily and economically!
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$185.99
QRO.cz Classic Single Output 2-Wire Bi-Directional Beverage Antenna Systems
QRO.cz Classic Single Output 2-Wire Bi-Directional Beverage Antenna Systems are designed for efficient direction switching using an internal relay, with control achieved directly over the coaxial cable. When no voltage is present on the coax, the antenna operates in the reverse direction (compared to a single-wire beverage). Applying voltage to the coax switches the antenna to the forward (straight) direction, matching the behavior of a single-wire beverage antenna. With careful design and construction, a single 2-wire beverage antenna can provide excellent performance in two directions. Unlike single-wire systems that use only a load resistor at the end, this system uses a transformer specifically designed to match the antenna's impedance. All transformers in the system must be precisely calculated based on the antenna's physical parameters—such as height, wire spacing, and wire diameter—to ensure optimal performance.
Not Yet Reviewed
$143.99
DX Engineering NCC-2 Receive Filter Sets
DX Engineering NCC-2 Receive Filter Sets provide an added dimension to the receive capabilities of the NCC-2 Receive Antenna Phasing System. These advanced plug-in filter module and adapter board pairs offer frequency-specific receive enhancements. The packages are available in pairs of high pass, band pass, and low pass frequency ranges with filter cut-off and center frequencies that correspond to the major Amateur low bands, 160, 80, 40 meters. Filter insertion loss is only about 1 dB. NCC-2 Receive Filter Sets are pairs of the original NCC-1 filters of the same type, each with the required RXFL-1 Filter Adapter. Both NCC-2 channels, "CH A RX ANT IN" and "CH B RX ANT IN" will benefit from the same pass-band characteristics. High pass, band pass, or low pass filter sets are available for users to choose and install into their NCC-2 for their desired application. By reducing or excluding frequency-specific interfering noise and signals, the noise floor of the desired passband can be dramatically lowered for greatly improved reception. Be aware that when filter pairs are installed, the NCC-2 no longer responds to signals out of the passband. In other words, at this time there is no electronically switched bypass for installed filters. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. The NCC-2 Receive Filters displayed here, and higher frequency band filters, are also available as single filters for the NCC-2, to create alternative wide-pass filter sets, and for DX Engineering single channel accessories, including the DXE-RPA-2, DXE-DMC-2 and the DXE RTR-2. The simplest way to filter your NCC-2 is to order one of these DX Engineering Receive Filter Sets for your unit and enjoy the best possible filtered performance from your DX Engineering NCC-2 Receive Antenna Phasing System.
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$106.96
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$238.96
DX Engineering NCC-1 Receive Filter Sets
DX Engineering announces a series of NCC-1 Receive Filter Sets, a breakthrough option for owners of the NCC-1 Receive Antenna Phasing Unit. These advanced plug-in filter module sets offer frequency-specific receive antenna system enhancements for the NCC-1. All filter modules sets are available in matched pairs of low-pass, band-pass and high-pass frequency ranges. Filter cut-off and center frequencies correspond to the major Amateur bands, 160, 80, 40, 20, 15 and 10 meters, with filter module insertion loss of only about 1 dB. Highly regarded by many owners and engineers to be the best receive phasing and noise canceling unit available, the DX Engineering NCC-1 is used extensively by enthusiasts in Amateur Radio DXing, Contesting, AM DXing, and Short-Wave Listening (SWL), and is also used in commercial AM and HF broadcast applications. DX Engineering NCC-1 Receive Filter Sets add a new dimension of functionality to the NCC-1, for advanced directional noise and signal nulling performance, enhanced with specific frequency range operations. By default, NCC-1 filter slots are jumpered to pass all signals. On the NCC-1 front panel, the BAND toggle switch "L" or "H" positions each activate one of two filter pair slots, allowing over 360 degrees of phase rotation in two frequency ranges. The BAND switch "L" position covers from 850 kHz to 8 MHz. The BAND switch "H" position covers from 2 MHz to 15 MHz. Frequencies outside these ranges will have less than 360 degrees of phase rotation. NCC-1 Receive Filter Sets must be placed into the proper BAND filter slots corresponding to desired usage. NCC-1 Receive Filter Sets are pairs of filters (2 of the same type), so both NCC-1 receive antenna inputs "A" and "B" exhibit the same pass-band characteristics. Band-pass, high-pass or low-pass filters are available for users to choose and install into their NCC-1 for their desired application. By reducing or excluding frequency-specific interfering noise and signals, the noise floor of the desired pass-band can be lowered for dramatically improved reception. You can install one set or two sets, depending on your desired filtering. NCC-1 "L" and "H" slots may be populated with pairs of band-pass, high-pass, or low-pass filters to suit the specific signal rejection needs of the discerning operator. As an example, an 80 meter DX enthusiast may elect to install two 80 meter band pass NCC-1 Receive Filters, part number DXE-NCCFL-BPF80M, into their NCC-1 "L" BAND slots. This would dedicate their NCC-1 to 80 meter-only operations. Setting the BAND switch to "L" would dramatically reduce noise and signals from outside the 80 meter band, very effectively excluding interference from nearby AM Broadcast, 160 and 40 meter stations. A much lower noise floor on 80 meters could be achieved for dramatically enhanced reception of weak 80 meter DX signals. An additional pair of filters could be installed into the "H" BAND slots, to enhance reception on the higher HF bands. For example, installing 20 meter high pass filters, part number DXE-NCCFL-HP20M, and switching to BAND H would drastically reduce all received noise and signals from frequencies below 13.70 MHz. With advanced planning of additional filter availability, an NCC-1 owner could even swap different filter sets for optimal operations in different contests or band pursuits. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. All NCC-1 Receive Filter Sets displayed here are also conveniently listed on a single page in the link tab called "Documentation." Order one or two DX Engineering NCC-1 Receive Filter Sets for your unit and enjoy the best possible performance from your NCC-1.
Not Yet Reviewed
$103.97
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$215.97
Hi-Z® Antennas Manual Directional Control Consoles
Hi-Z® Antennas Manual Directional Control Consoles are specialized "low-side" BCD grounding switches that are specifically designed to operate Hi-Z Antennas Phasing Combiner relay units, also known as Phase Controllers. Each HIZ-MDC console controls the phasing and direction selection of only Hi-Z Antennas Receive Vertical Antenna Arrays and supplies power to the array element amplifiers. Hi-Z Antennas Manual Directional Control Consoles are attractive and convenient, featuring a large rotary switch knob and green LEDs arranged as receive array directional azimuth indicators with corresponding compass bearing degree markings on the front panel. Selection of a specific model Manual Directional Control Console (MDC) is required, corresponding to each version of Hi-Z Antennas Receive Array Phasing Combiner or legacy Phase Controller. Each console serves as a replacement for legacy, discontinued Hi-Z manual Shack Switches, and for the discontinued Hi-Z SS-2 and SS-2PLUS: • HIZ-MDC-4 works only with the multiband Four Square Arrays PC-4A and PC-4ELEMENT • HIZ-MDC-8PRO works only with the 85/113 ft. diameter multiband 8 Circle Arrays PC-8PRO and PC4-8PROUP/PLUS • HIZ-MDC-8 works only with the 200 ft./100 ft. diameter monoband 8 Circle Arrays PC-8, PC-8A and PC-8B HIZ-MDC series Manual Directional Control Consoles are stylish, rugged, and heavy — they stay in place on the desk or shelf with four large non-skid rubber feet under a Stainless Steel chassis and an appropriate black powder coated steel cover. The required multi-conductor array power and BCD control cable (purchased separately for the required number of conductors and length to the array) passes through a grommet on the rear panel and connected internally. A rear panel 2.1mm +13.8VDC power connector accepts the included mating 2.1mm plug and unterminated DC power cable, for connection to a user provided +13.8VDC 1A fused, well-filtered power supply.
Not Yet Reviewed
$149.99