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15 Results Found For "preamp"
DX Engineering RPA-2 Modular Receive Preamplifiers
DX Engineering RPA-2 Modular Receive Preamplifiers are newly designed versions of the RPA-1 with internal slots for accessory modules. They accommodate the addition of the one optional plug-in module, such as the 75 to 50 ohm Impedance Transformer Module, or the Receiver Guard 5000HD Plug-In Module, or the DX Engineering Clifton Laboratories Z10020 AM Band Filter Module. DXE-RPA-2 preamps have very low internal noise and are optimized for the 300 kHz to 35 MHz range. They help you hear the weakest signals without artificially raising the noise. Meticulous craftsmanship and durable, robust components allow these preamplifiers to withstand high signal levels while providing superior dynamic range and third-order intercept performance that equals or exceeds most receiver and transceiver front-ends. RPA-2 Receive Preamplifiers have key features added, as requested by our tech-oriented customers and enthusiasts: - Internal slot accommodates the optional 75 to 50 ohm Impedance Transformer Module to accomplish typical receive antenna feedline to equipment transitions without losses -Also allows direct connection to 50 ohm receive antenna feedline BNC connectors with no transformer required - Internal slot for DXE-RG5000HD-PM Receiver Guard 5000HD Plug-In Module – Front-end protection for the RPA-2 - Secure BNC female connectors and receive-system friendly F female connectors remain; both prevent accidental connection to transmitting devices with UHF connectors - A green LED indicates when DC power is present and the preamplifier circuit is engaged. - An ingenious positive-capture threaded-sleeve 2.1 mm power connector that ensures the DC power cannot be accidentally disconnected from the RPA-2. - Alternatively, a simple internal jumper change allows the RPA-2 to be powered by DC on the feedline While many other common preamplifiers suffer from harmonic distortion, RPA-2 Modular Receive Preamplifiers include our exclusive, advanced push-pull design that eliminates harmonic distortion. Their high quiescent current increases their ability to handle strong signals without distortion or overload. These high performance devices must be powered with a well filtered and regulated DC power supply and will offer maximum performance at 12 to 18 Vdc input. Please do not use a cheap wall transformer or noisy switching wall-wart to power these top-of-the-line preamplifiers. Indoor installation at the back of the radio is recommended for RPA-2. For those who want to place them in an enclosure at a receive antenna system, a handy internal jumper allows these new units to be powered on the coaxial cable. RPA-2 Receive Preamplifier Specifications: -Input and Output Connectors, female: BNC and F -Frequency Range: 300 kHz to 35 MHz -Gain: 16 dB, +/- 1.5 dB (over entire frequency range) -Output Third Order Intercept: 43 dBm -Noise Figure: 3.5 dB -One dB Compression Point: +26 dBm (400 mW output) -Dynamic Range, IM3: 110 dB or greater (500 Hz bandwidth) -Power Requirement: 12-18 Vdc, 140 mA max. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. DX Engineering RPA-2 Modular Receive Preamplifiers offer superior receiving results on crowded medium wave and shortwave bands as well as on the ham bands. SWLs and Radio Amateurs around the world have come to rely on the advanced operational performance of DX Engineering Receive Preamplifiers. You will be able to pull in the weakest signals and snag that rare one, under the most difficult conditions, when you need it the most. Order your DX Engineering RPA-2 today!
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$269.99
SSB Electronic Mast-Mount Preamplifiers
SSB Electronic Mast-Mount Preamplifiers are low-noise, band-specific, weatherproof preamplifiers designed for installation near VHF and UHF antennas. Available for the 6 meter, 4 meter (Europe), 2 meter and 70 cm Amateur bands, these preamplifiers are installed in-line, at the antenna. They improve receive performance by amplifying weak signals before feedline loss can reduce them. Powering and Sequencing Most models can be powered remotely through the coaxial cable, and many modern transceivers include a built-in bias-tee for mast-mounted preamplifiers. If the transceiver or transverter system does not provide power, an external bias-tee or remote-feed unit is required. • The DCW-15 and DCW 2004B provide sequencing support. • The DCC-12 does not provide sequencing. • SP series preamplifiers include a built-in RF VOX circuit for safe operations up to 100 watts; for transmit power above 100 watts, PTT control with a sequencer is required. Some models require a direct DC connection (UHF female). • -S series preamplifiers feature lower current signal relays with slightly higher insertion loss. • MHP and MHP-S series preamplifiers versions require sequencer control (see below). Signal Filtering and Switching Built-in helix filters effectively reject out-of-band signals, helping maintain clean receive performance. Real coaxial relays handle transmit/receive switching, resulting in very low insertion loss (except for SP-S series). And each amplifier is carefully calibrated at multiple test stations before packaging. Dual-Band Models Dual-band models include built-in diplexers, so they require only one connection for the multiband antenna and one connection for the station coaxial cable. MHP Series for Demanding Stations The MHP series is designed for demanding operating environments and provides higher gain for weak-signal modes such as Tropo-DX and EME. With maximum transmit power handling of 1500 watts on 6m and 2000 watts on 2m and 70cm, these preamplifiers are well suited for contesting, DX, and EME operation. Important Note for MHP Models Bias-tee power (on the RF coax) is not supported in most MHP Preamplifiers. They must be powered directly using the appropriate cable size for the required distance, and they may only be operated with a correctly wired sequencer, such as the DCW 2004 B Sequence Controller. Transmitting high power without a directly wired sequencer is likely to damage the MHP preamplifier. Housing and Hardware All SSB Electronic Mast-Mount Preamplifiers are supplied in UV-resistant, weatherproof housings with Type N female connectors. Hot-dip galvanized clamps and stainless steel mounting hardware are included. See individual models for band coverage and detailed specifications.
Not Yet Reviewed
$480.99
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$494.99
SSB Electronic LNA Series Low-Noise Preamplifiers
SSB Electronic LNA Series Low-Noise Preamplifiers are newly developed low-noise receiving amplifiers for the 6m, 2m and 70cm bands, featuring super low noise with high gain, making them ideal for use in EME (moon bounce), MS (meteor scatter), Aurora and tropo-DX operations. High performance is reflected in exceptional IP3 test figures (35dBm, typical), to provide strong signal immunity. Very good rejection of strong signals near and far guarantees interference-free operation, even in the vicinity of other radio transmissions from commercial and broadcast stations as well as mobile carriers. The input circuit of the amplifier is built with high quality components in a chamber construction, optimized for the best noise characteristics. The bandpass at the output of the amplifier ensures very good in-band selection with signals outside the pass band effectively suppressed. The LNA Series Preamplifiers do not have RX/TX relays and are intended for receiving applications. LNA Series Preamplifiers are built in a sturdy tinplate housing, suitable exclusively for indoor applications (Ip41 to DIN EN 60529). Choose between models that have two Type-N female connectors, Type-N Male and Female, and SMA female. These amplifiers can be powered via an external cable or via a coaxial bias tee (remote power supply). The -MA weatherproof variant of the receive-only LNA series is characterized by a robust, IP44-protected housing, allowing the high-quality preamplifier to be mast-mounted close to the antenna using Type-N connectors only. Power is supplied exclusively over the coax. If your receiver does not output 12-15 VDC receive preamplifier power onto the antenna feedline, use the SSB Electronic DCC-5000PRO Bias Tee (remote power inserter).
Not Yet Reviewed
$316.99
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$494.99
SSB Electronic LNA-30 Broadband 5 kHz – 30 MHz Low Noise Mast-Mount Preamplifiers
SSB Electronic LNA-30 Broadband 5 kHz – 30 MHz Low Noise Mast-Mount Preamplifiers cover the VLF, LF, and MF range, including the 2200 through 10 meter Amateur bands. Only for receiving applications, the LNA-30 is used to transform a simple wire or small whip antenna into a powerful broadband receiving antenna. This allows, for example, an SDR receiver to be operated in an unfavorable location with limited space and still deliver very good results. A skimmer or The LNA-30 amplifies the signals received by about 20 dB. The operating power can be varied for effect from 12 and 24V, with higher gain achieved at 24V, but the lowest figure at 12V. A very RF quiet, well filtered linear power supply should be used, not a switching power supply, which connects to this mast-mounted preamplifier via a separate coaxial cable; a UHF female handles the power input. The LNA-30 handles the RF separately with Type-N female connectors for antenna and receiver. When power is removed the preamplifier turns of and no signal from the antenna passes, making this an "always on" broadband preamplifier. The LNA-30 may be mounted on masts up to 2.25 in. (58mm), is weatherproof, and should be placed outside, close to the receive antenna. This preamplifier cannot pass RF power and is not suitable for transmitting operations.
Not Yet Reviewed
$429.99
SSB Electronic LNA-5000 50–5000 MHz Wide Band Mast-Mount Preamplifiers
SSB Electronic LNA-5000 50–5000 MHz Wide Band Mast-Mount Preamplifiers increase signal sensitivity for scanners, receivers, and measuring devices. They may also serve as a low-power amplifier or buffer amp. Built with a modern MMIC on a low-loss ceramic microwave substrate, it provides approximately 20 dB gain, a low 2 dB noise figure, excellent large-signal handling with IP3 greater than 30 dBm, and input IP values improved by 20 dB over the previous version. An input amplitude limiter helps protect against electrostatic discharge. The LNA-5000 supports up to 160 mW PEP / 20 dBm output, uses Type-N female connectors, covers 50 to 5000 MHz, and operates from a 10–20 VDC supply either directly through the DC Input UHF female connector or remotely through the RF coax using an optional DCC-5000PRO Bias Tee.
Not Yet Reviewed
$284.99
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 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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$275.99
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$464.45
DX Engineering Beverage Antenna System Combos
DX Engineering Beverage Antenna System Combos are single-wire single-direction Beverage antenna feed systems. These combos include DX Engineering's superb receive preamp and the Beverage antenna feedpoint transformer! The included BFS-1 transformer design makes them immune to the strong signal overload and core saturation. The isolated-winding matching transformer significantly increases the signal-to-noise ratio in Beverage and other high-impedance antennas. The included termination resistor is a special 470 ohm, 2 watt, non-inductive resistor that withstands nearby lightning strikes. Also included, the DXE-RPA-2 Modular Receive Preamplifier is the best low noise, receive preamps available… period. It is optimized for the 300 kHz through 35 MHz frequency range with an advanced push-pull amplifier design that eliminates harmonic distortion and it handles strong signals without distortion or overload. The DXE-RPA-2 Modular Preamp features one internal option slot for a plug-in module. Choose from the DXE-RG5000HD-PM Receiver Guard, the DXE-IT-PM 75 to 50 ohm Impedance Transformer, or use a RXFL Filter Adapter and a Receive Filter board for band pass, high pass or low pass filtering. Click "More Detail" for additional information. The "Documentation" tab contains links to associated files. SWLs and Radio Amateurs around the world have come to rely on the exceptional performance of DX Engineering products. Order one of these DX Engineering Beverage Antenna System Combos to get excellent MW and HF reception with your Beverage antenna.. * Important Note regarding DX Engineering Protection Plans and Kit Combo Contents Protection plans cannot be purchased for combination packages or on applicable devices after shipment. DX Engineering Combination Kits and Packages are designed to help you easily visualize and order the right items for your specific needs. However, we encourage you to contact our experienced Technical Sales Team for assistance. We can help adjust the kit contents, suggest substitutions based on stock availability, and offer DXE Protection Plans for radios and devices when applicable. Contact us for Expert assistance and make informed purchasing decisions with our guidance.
Not Yet Reviewed
$385.98
KD9SV Products SV-DXSS DXpedition Receive Antenna Switches
KD9SV Products SV-DXSS DXpedition Receive Antenna Switches are the ultimate unit for the active low-band DXer. They combine their legendary Front End Saver with the 80/160 Variable-Gain Preamp, a Four-Position Receive Antenna Switch and a high-speed Solid State Amplifier Keying Interface, all into one easy-to-use package. Originally designed for DXpeditions, they are sure to be on the wish list of all low-band DXers! DXpedition Switches were built to be connected to transceivers that ARE equipped with receive outputs and inputs, and to the transceiver's amplifier keying line. DXpedition Receive Switches will directly key all late-model RF power amplifiers. They include a heavy-duty relay for receive antenna disconnection and transceiver RX ANT INPUT grounding, giving your transceiver the ultimate in front-end protection. The four-port antenna switch allows you to select from different receive antennas and the variable-gain control adjusts for 10 to 28 dB preamplification with dual-band band-pass filtering. This lets you choose, on the fly, the correct antenna and gain combination for optimal signal-to-noise for changing band propagation conditions. You may also bypass the unit when you are operating on the higher bands or to listen to the low band transmitting antenna. KD9SV DXpedition Receive Antenna Switches include the Front End Saver, with a lightning-fast solid-state amplifier keying system that is full break-in CW (QSK) capable for all modern amplifiers. They can handle legacy amplifier positive DC voltage keying lines up to 500 Vdc at 8 A. However, DXpedition keying circuits will not work with amplifiers that have negative DC voltage keying lines such as the Heathkit SB-200, Yaesu FL2100-B or Collins 30L-1. For these and other negative DC voltage keyed amplifiers, pair these DXpedition Switches with KD9SV Products SV-KR External Keying Relays. Whether you are a DXer, contester, antenna experimenter, or just want easy access to multiple receive antennas, KD9SV Products SV-DXSS DXpedition Receive Antenna Switches will organize your station as never before! Order yours now, exclusively from DX Engineering!
Not Yet Reviewed
$353.99
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.
( 12 )
$375.99
Antennas-Amplifiers 6530 70cm 200W Low Loss Band Pass Filters
Antennas-Amplifiers 6530 70cm 200W Low Loss Band Pass Filters are designed for stations requiring low insertion loss and reliable front end protection across the 430–450MHz range. Capable of handling up to 200 watts of transmit power, these filters are equally effective in both transmit and receive applications—introducing only 0.12dB of loss while sharply attenuating out of band signals. Installed after a 200 watt transmitter, the 6530 helps suppress unwanted emissions and reduces interference into neighboring bands. When positioned ahead of a wideband preamplifier, it prevents overload and desensitization caused by strong signals outside the passband, making it ideal for weak signal, contesting, repeater, and EME applications. The 6530 filter employs high Q coils and capacitors with unloaded Q values exceeding 1500, ensuring steep skirts and excellent selectivity. For durability, a rigid 0.8 mm brass enclosure provides mechanical stability and long service life. N type female connectors ensure secure, low loss connections.
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$288.99
QRO.cz OLI 12 IP-Based Station Controllers
QRO.cz OLI 12 IP-Based Station Controllers are compact web-controlled IP relay controllers designed for seamless integration with K9AY++, 4-WAY beverage antenna systems, and 7ANT remote antenna controllers. Housed in a rugged aluminum enclosure, these controllers offer 12 positive-voltage outputs with built-in electronic fuse protection, making them ideal for remote antenna switching, preamp control, and band-pass filter selection. With a web-based user interface, support for Node-RED, Stream Deck, and Touch Portal, the OLI IP Controllers enable intuitive and flexible station automation. They connect via a standard DB15 cable and LAN port, requiring no firmware uploads or complex configuration—just plug in and go.
Not Yet Reviewed
$258.99
QRO.cz OLI 16 IP-Based Station Controllers
QRO.cz OLI 16 IP-Based Station Controllers are compact, universal web-controlled IP relay controllers housed in a rugged aluminum enclosure, these controllers offer 16 positive or negative (GND) voltage outputs with built-in electronic fuse protection, making them ideal for remote antenna switching, preamp control, and band-pass filter selection. With a web-based user interface, support for Node-RED, Stream Deck, and Touch Portal, the OLI IP Controllers enable intuitive and flexible station automation. They connect via a standard DB25 male cable and LAN port, requiring no firmware uploads or complex configuration.
Not Yet Reviewed
$271.99
Antennas-Amplifiers 6510 70cm 50W Narrow Band Pass Filters
Antennas-Amplifiers 6510 70cm 50W Narrow Band Pass Filters are low insertion loss, narrowband 70cm band pass filters engineered to deliver clean, interference free operation across the 430–450MHz frequency range. Designed for both transmit and receive operation, these filters support up to 50 watts of RF power while maintaining an exceptionally low insertion loss of approximately 0.15dB, ensuring strong signal integrity and protecting overall system sensitivity. When installed after a 50W transmitter, the filters effectively suppress unwanted out of band emissions, reducing interference into nearby services. Placed ahead of wideband preamplifiers, they help prevent overload and desensitization caused by strong adjacent band signals—making them well suited for weak signal work, repeaters, and RF dense operating environments. With their compact size and straightforward installation, 6510 filters integrate easily into a variety of UHF station layouts, providing a practical and reliable way to improve signal cleanliness and system performance.
Not Yet Reviewed
$251.99
Antennas-Amplifiers 6311 2-meter 200W Narrow Band Pass Filters
Antennas-Amplifiers 6311 2 meter 200W Narrow Band Pass Filters are engineered to deliver reliable, high-performance signal conditioning across the full U.S. 2 meter amateur band (144–148 MHz). Designed to handle power levels up to 200 watts, these filters effectively refine transmitter output while also serving as protective front-end filters for broadband preamplifiers, shielding sensitive equipment from unwanted out-of-band signals. Built with precision high Q coils and premium capacitors, they achieve exceptionally low insertion loss while maintaining outstanding selectivity. These filters also help mitigate TVI issues and reduce interference from nearby strong transmitters on HF, 6m, or 70cm bands, ensuring smoother operation and improved coexistence with neighboring systems.
Not Yet Reviewed
$295.99