HF Receive Antenna System Devices

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.

4.97 out of 5 stars ( 37 )

$119.99

QRO.cz RX AuditePRE SDR Antenna Switch Controllers

QRO.cz RX AuditePRE SDR Antenna Switch Controllers combine the functionality of a T/R switch, a receive antenna input and a receive splitter with specialized switching, all with RF limiter protection. The transmit/receive (TX/RX) main antenna can be shared with both outputs, transceiver and receiver (SDR) with RF power limiter protection. These versatile devices are perfect for use with a separate SDR receiver for Spectrum Panadapter, WebSDR or as a Skimmer Server to contribute spots to the Reverse Beacon Network (RBN). The RX-AuditePRE features frequency coverage of 100 kHz–60 MHz including 160 through 6 meters with a maximum transmit power handling of 200W and a switchable 16 dB preamplifier. Included in the Package: RX-AuditePre Switch – Assembled and Tested DC Cable – DC barrel connector to stripped and tinned wires

5.0 out of 5 stars ( 4 )

$509.99

DX Engineering Plug-in Modules

A new series of Plug-in Modules are available specifically for new DX Engineering devices that accept them. Details on each module are found at each part. DX Engineering Plug-in Modules include: * DXE-RPA-2-PM Receive Preamplifier Plug-in Modules * DXE-RG5000HD-PM Receiver Guard 5000HD Plug-in Modules *DXE-IT-PM 75 to 50 ohm Impedance Transformer Modules Modules for High Pass and Band Pass Filter Plug-in Modules are coming in 2017. These new Plug-in Modules are optional devices for the following new DX Engineering devices: * DXE-NCC-2 Receive Antenna Phasing Systems * DXE-RPA-2 Modular Receive Preamplifiers * DXE-RTR-2 Modular Receive-Transmit Interfaces * DXE-DMC-2 Dual Module Chassis Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. Discover new ways to equip your world-class station with DX Engineering Plug-in Modules for your DX Engineering devices. Click below on More Details to learn more!

4.76 out of 5 stars ( 17 )

$35.99

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$84.99

DX Engineering High CMI Receive Feedline Chokes

DX Engineering High CMI Receive Feedline Chokes achieve exceptionally high isolation between the input and output connector shields to effectively block common-mode RF noise and unwanted signals that collect on 50 or 75 ohm receive antenna feedlines. Ongoing research and development by the design team at DX Engineering has produced two bidirectional Receive Feedline Chokes; a 50-ohm model with BNC female connectors and a 75-ohm model with Type-F female connectors. Both chokes cover the RF frequency range 100 kHz through 30 MHz. They exhibit very high common mode impedance* (CMI typically over 8,000 ohms across the 160, 80, and 40 meter bands) and feature DC pass capability up to 700 mA at 13.8VDC, with extremely low SWR and negligible insertion loss. Affordable DX Engineering High CMI Receive Feedline Chokes will be considered the best, most versatile receive chokes ever produced for typical low band receive antenna applications.

5.0 out of 5 stars ( 3 )

$59.99

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$64.95

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.

5.0 out of 5 stars ( 5 )

$100.99

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$107.99

DX Engineering Receive Feedline Voltage Injectors

DX Engineering Feedline Voltage Injectors, DXE-FVI-1, are high-quality bias-tee devices that place direct current onto a receive antenna system's coaxial cable while preventing DC from reaching the Radio port. These FVI-1 voltage injectors are used to power active accessory devices, such remote relays, switching systems, and preamplifiers. These are the original equipment FVI-1 units provided with single DX Engineering Active Receive Vertical antenna models. Voltage is applied via the 2.1mm power connector to the receive antenna feedline F connector. The RCA phono jack connects to the receiver input with that DC voltage blocked, while passing RF from 100 kHz to 30 MHz. Various RCA phono plug adapters for different RF cable connectors are available in Suggested Parts. Two DXE-FVI-1 feedline voltage injectors may be connected at opposite ends of a feedline to provide DC voltage on the transmission line for your own custom application, keeping the input and output RF devices isolated from the voltage. The included 120V AC 60 Hz wall transformer power supply may be connected to the 2.1mm power connector may to place approximately +12 volts DC on the coaxial cable center conductor, with the coaxial cable shield used as the negative ground return. A different station power supply, 1-16 VDC, may be used with an in-line, 1 Ampere, fast-blow fuse for various devices. DX Engineering feedline voltage injectors are ready for your "DC power on the coax" needs! Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. When you need to inject a DC voltage onto a 75 ohm coaxial cable used for receiving, remember the DX Engineering Feedline Voltage Injector!

Not Yet Reviewed

$99.99

ELAD ASA16 Amplified Antenna Splitters

ELAD ASA16 Amplified Antenna Splitters are designed to distribute the signal from one antenna to up to six different receivers simultaneously. These six outputs are isolated to prevent interference from mismatches, but they do not provide any amplification. A switchable attenuator reduces the input signal by 15dB. A notable feature is the PTT input. When engaged, all receiver ports are isolated by more than 60dB (at 12MHz) from the input. This reliably protects even the most sensitive inputs. The integration into a ham radio station is made easy due to the same switching polarity of most transceivers, when keyed, the PTT output switches to ground. All coaxial connectors on the ASA16 are BNC female, and all inputs and outputs are designed for a 50-Ohm impedance. Three LEDs on the front show the current state of the ASA16: On/Off, Attenuator and PTT state. The ASA16 requires a 12VDC 300mA power supply (not included). The PTT connector is a stereo 1/8in. (3.5mm) male plug. The enclosure is made from brushed aluminum, with solid rubber padding. Upgrade your RX antenna distribution system with the ELAD ASA16 Amplified Antenna Splitter, ensuring reliable and high-quality signal reception across multiple receivers.

4.0 out of 5 stars ( 1 )

$305.99

KiwiSDR V2 SDR Protection Circuit

The KiwiSDR V2 SDR Protection Circuit is designed to safeguard KiwiSDR receivers—and virtually any other SDR—from the most common and costly sources of front end damage. Many KiwiSDR owners have experienced failures caused by nearby lightning storms, transmitting into an antenna positioned too close to the KiwiSDR antenna, or accidentally transmitting directly into the receiver. The original V1 protection circuit provided solid protection against static discharge and nearby lightning, but it did not always survive accidental high power RF transmission. The V2 design directly addresses this. The upgraded V2 unit adds a replaceable 100 mA fast blow fuse, providing an additional sacrificial layer of defense for your receiver. A spare fuse is included in a small plastic bag—keep it safe, as 100 mA 1808 fast blow fuses are not easy to source. The protection circuit is housed under a secure 3D printed cover held in place with a 1.4 mm screw for easy access.

Not Yet Reviewed

$35.99

ELAD ASA15 Amplified Antenna Splitters

ELAD ASA15 Amplified Antenna Splitters are designed to distribute the signal received from one antenna to up to five different receivers simultaneously. They utilize an internal divider and ultra-wideband low-noise amplifiers to ensure the antenna signal is effectively shared across all five outputs. Each of the five outputs can provide either 0dB (no gain) or 12dB gain, which helps compensate for long distribution cable run losses or boost weak signals. Additionally, a 15dB attenuator on the input can be switched on to prevent overload. Upgrade your RX antenna distribution system with the ELAD ASA15 Amplified Antenna Splitter, ensuring reliable and high-quality signal reception across multiple receivers.

5.0 out of 5 stars ( 1 )

$327.99

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

5.0 out of 5 stars ( 2 )

$124.95

QRO.cz RX Preamp and Bias Tee Module Box Combo

This powerful combo from QRO.cz includes the RX Preamp Module Box with a 2N5109 transistor and a Bias Tee Voltage Injector, offering a complete solution for enhancing receive-only antenna systems. The preamp is based on the proven W7IUV design and delivers up to 18dB of gain with a built-in variable attenuator, allowing precise control over signal amplification. A multi-turn potentiometer enables fine-tuning of the transistor bias for optimal linearity and performance. Two onboard relays automatically switch the unit to bypass mode when power is not present. Power can be supplied either directly via an external DC source or through the included bias tee, which injects DC voltage into the coaxial feedline while isolating the radio from DC current. The bias tee simplifies installation by combining RF and DC over a single coaxial cable, making it ideal for powering remote devices like preamps, relays, or antenna switches. Together, these components provide a clean, efficient, and flexible receive system for antennas such as beverages, Double Half Delta Loops, flags, and other popular RX designs.

Not Yet Reviewed

$299.99

DX Engineering Receive Feedline Transformers

DX Engineering Receive Feedline Transformers are designed to match your receive antenna 75 ohm output impedance to the nominal 50 ohm input impedance of most receivers. These transformers may be used in almost any receiving application that requires a 75 ohm Type F connection to a 50 ohm BNC connector. These transformers have very low loss (<0.3 dB) and very wide bandwidth, 100 kHz to 30 MHz! Matching the receive antenna or array to the receiver ensures the best possible performance as a result of a system impedance match. *Important! - These Feedline Transformers are Intended to be used on an RF ONLY coax and should NOT be used for power.

5.0 out of 5 stars ( 1 )

$55.99

ELAD ASA62 Amplified Antenna Splitters

ELAD ASA62 Amplified Antenna Splitters are designed to distribute the signal from six antennas to two different receivers simultaneously. A powerful Amateur Radio or SWL station requires multiple antennas to optimally cover each frequency range. The ASA62 Amplified Antenna Splitters from ELAD (Italy) allows you to distribute up to six antennas to two receivers. Each input is buffered by a very low-noise amplifier (AD8099), ensuring that the signals do not interfere with each other. By doing so, the signal from one antenna can be sent to both receivers simultaneously. Switching is done via relays, not PIN diodes, to avoid unwanted signal distortion. Operation is straightforward with push buttons on the front panel, and LEDs built into the buttons clearly indicate their status. Alternatively, the ASA62 can be operated remotely, with free software available for download on the Microsoft Windows platform. The frequency range is 9kHz to 70MHz, all connectors are BNC female, and the impedance is 50 Ohms. A DC power supply cable is included. Note that the ASA62 is not suitable for transmitting.

Not Yet Reviewed

$309.99

DX Engineering RTR-2 Modular Receive-Transmit Interfaces

DX Engineering RTR-2 Modular Receive-Transmit Interfaces provide the easiest and safest method for connecting a dedicated receive antenna to an HF transceiver that does not have a separate receive antenna input. Placed inline with the transceiver's antenna connector, the RTR-2 does the job of a 200 watt T/R relay using the amplifier keying line for failsafe protection, so your transmitted energy cannot go to the receive antenna. Three internal Plug-in Module option slots provide added features and protection: * DXE-RPA-2-PM Receive Preamplifier Plug-in Module * DXE-TRI-PM Transmit Receive Interrupter Plug-In Module * DXE-IT-PM 75 to 50 ohm Impedance Transformer Plug-in Module DX Engineering RTR-2 Modular Receive-Transmit Interfaces allow the standard transceiver owner to enjoy the advantages of separate receive antennas. For the unswitched receive antenna (RX ANT) port on expensive transceivers, the RTR-2 interface also adds inexpensive failsafe protection. The receive antenna line can be opened or grounded with the optional DXE-TRI-PM Interrupter plug-in module. The RTR-2 is a very useful device for many applications, including: * Connection of external receiving antennas to transceivers lacking external antenna ports * T-R antenna switch for older equipment using separate transmitters and receivers * Interfacing antennas to older phasing or noise cancelling systems * Addition of a switchable receive preamplifier to any transceiver or transmitter and receiver combination * Excellent failsafe receiver protection for close-spaced transmit and receive antennas, without performance degradation of diode circuits of other devices. RTR-2 units feature a unique, failsafe connection method that prevents the hot switching and timing errors that are common on other transmit/receive relays. RTR-2 interfaces switch fast enough for partial break-in CW operation. There are many simple applications for the new RTR-2 and now internal modules can add dramatically improved reception of those really weak signals on the crowded HF bands! DX Engineering RTR-2 Modular Receive-Transmit Interfaces enable operators to enjoy improved reception with any low noise receiving antenna system. This shielded enclosure relay system provides a safe method of connecting a receive antenna, such as a Beverage, Active Receive system, or other receiving accessories to your radio. Major features that make the DX Engineering RTR-2 Receive Antenna Interfaces your best choice for a receive T/R system device: * New Status Indicating Color-changing LEDs * Three internal slots for new DX Engineering modules * New Key Line Out connector for Amplifier * New internal jumper for placing DC on the Receive Antenna feedline for Active or Loop receive antennas * Attractive and heavy stainless steel enclosure * 200 watts RF switching capability * Supports CW partial break-in * Main transmit antenna connector is SO-239 (UHF female) * Radio RF connector is SO-239 (UHF female) * Receive antenna input is 75 ohm F connector * Receive outputs are standard 75 ohm Type F connectors * Inputs are 50 ohm BNC or 75 ohm F (Optional transformer module available) * Safe switching--transmit antenna is always connected to transceiver on power-off * Hot switching lockout--disables receive antenna during transmit mode (Optional DXE-TRI-PM can be set to short the RX ANT line) * Versatile--allows inclusion of Optional RF preamplifiers and other plug-in modules * Simple 13.8 Vdc input for all operations An indispensable accessory for the DX enthusiast and useful for any Amateur's shack, DX Engineering RTR-2 Modular Receive-Transmit Interfaces can help you expand and improve your station's antenna connections and the protection of your equipment.

4.92 out of 5 stars ( 12 )

$375.99

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.

5.0 out of 5 stars ( 2 )

$195.99

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

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.

5.0 out of 5 stars ( 1 )

$35.99

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$163.99

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 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!

5.0 out of 5 stars ( 1 )

$185.99

DX Engineering Receive Filter Plug-In Modules

DX Engineering Receive Filter Plug-In Modules provide frequency-specific receiving system enhancements, which fit into special DX Engineering devices listed below. These advanced plug-in filter modules are available separately to allow any user to create a specific or customized filter with 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 1dB. By reducing or excluding frequency-specific interfering noise and signals, the noise floor can be lowered for the desired passband for dramatically improved reception DX Engineering Receive Filter Plug-In Modules may be installed in these devices: DXE-DMC-2 Dual Module Chassis accepts one or two filter modules to create a stand-alone passive inline filter unit of any configuration. One high pass and one low pas can be combined to create a multi-band bandpass filter of any HF range. DXE-RPA-2-PM Modular Receive Preamplifier accepts one Receive Filter Plug-In Module to customize the preamplifier passband. DXE-NCC-2 Receive Phasing Controller can accept one or two Receive Filter Plug-In Modules, one into each, Channel A and Channel B. The DX Engineering NCC-2 is highly regarded by many owners and engineers to be the best receive phasing and noise canceling unit available and 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 Receive Filter Plug-In Modules add an extra dimension of functionality to the NCC-2, for advanced directional noise and signal nulling performance, enhanced with a specific frequency range operations. By default, NCC-2 internal option slots have bypass boards to pass all signals. Receive Filters placed into these slots dedicate the unit to filtered operation. Typically, one pair of band-pass or high-pass or low-pass filters, depending on desired filtering, is installed in the NCC-2 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 Receive Filter Plug-In Modules, part number DXE-R-BP80-PM, into their NCC-2 Channel A and Channel B middle slots. This dedicates their NCC-2 to 80 meter-only operations. This dramatically reduces 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 across 80 meters can help achieve reception of weak 80 meter DX signals. An additional pair of filters can be swapped out for a different band when desired. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. All Receive Filter Plug-In Modules displayed here are also conveniently listed on a single page linked in Documentation.

Not Yet Reviewed

$49.99

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$54.99

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.

5.0 out of 5 stars ( 2 )

$163.99

DX Engineering Transmit Receive Interrupter Plug-In Module

DX Engineering Transmit Receive Interrupter Plug-In Module, DXE-TRI-PM, provides essential protection from the station's transmitted energy picked up by a receive antenna that is connected to the DXE-NCC-2 Channel B Receive Antenna Input active front end. This optional custom PCB relay switch device is typically installed in the top Option Slot of the Channel B rear panel board in the NCC-2. When the transceiver keys the RADIO PTT port of the NCC-2, the DXE-TRI-PM can open or ground the receive antenna input and the board output, as selected by jumpers. It functions independently and does not affect or depend on the settings of the NCC-2 Bias-Tee Enable circuit that places DC on the receive antenna feedline for Active antennas. The DXE-TRI-PM is only in the path of the receive antenna input. It also features a Gas Discharge Tube to protect the front end of the NCC-2 while in the receive mode. Adding a second DXE-TRI-PM Transmit Receive Interrupter Plug-In Module to the the top slot of the NCC-2 Channel A rear panel board is recommended. The gas tube provides pulse energy protection during receive and disconnect or grounding protection when the CH A RX ANT IN port is used for a receive antenna that is physically too close to the transmit antenna. Adding a DXE-TRI-PM can provide input protection for the RTR-2 RX ANT IN during receive and by grounding the receive antenna input during transmissions. Alternatively, the DXE-TRI-PM installed in the DXE-DMC-2 Dual Module Chassis can interrupt or ground any receive antenna feedline or a receiver input. Jumper settings select opening or grounding of the receive antenna input and receiver output. This receive feedline RF switch is operated by toggling 13.8 VDC, on for Receive and off when Transmitting. The DMC-2 PCB jumper HD5 selects operating DC from either the 2.1mm power connector or the "Receiver Output" coaxial cable with a user supplied DC Bias-Tee device, such as the DXE-FVI-1 Feedline Voltage Injector. Remote outdoor installation requires a weather resistant cover.

Not Yet Reviewed

$44.99

QRO.cz RX AuditePRE3 SDR Antenna Switch Controllers

QRO.cz RX AuditePRE3 SDR Antenna Switch Controllers combine the functionality of a T/R switch, a receive antenna input and a receive splitter with specialized switching, all with RF limiter protection. The transmit/receive (TX/RX) main antenna can be shared with both outputs, transceiver and receiver (SDR) with RF power limiter protection. These versatile devices are perfect for use with a separate SDR receiver for Spectrum Panadapter, WebSDR or as a Skimmer Server to contribute spots to the Reverse Beacon Network (RBN). The RX-AuditePRE3 features frequency coverage of 100 kHz–60 MHz including 160 through 6 meters with a maximum transmit power handling of 200W and a switchable 16 dB preamplifier. Included in the Package: RX-AuditePre3 Switch – Assembled and Tested DC Cable – DC barrel connector to stripped and tinned wires

Not Yet Reviewed

$509.99

QRO.cz Bias Tee Receive Feedline Voltage Injectors

QRO.cz Bias Tee Receive Feedline Voltage Injectors are engineered to inject DC voltage into a receive antenna system's coaxial cable while isolating the radio port from DC current. This allows you to power remote devices—such as preamplifiers, relays, or switching systems—without the need for separate power lines, simplifying your installation by combining RF and DC over a single coaxial feed. Typically installed at the receiving end of the coaxial cable, the bias tee passes DC power from an external source to the coax line running to the powered device. It uses a feed inductor to deliver DC to the device side and a blocking capacitor to prevent DC from reaching the radio. For added flexibility, bias tees can be used on both ends of the coaxial line to serve as DC input and output points.

Not Yet Reviewed

$93.99