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DX Engineering HF Preamplifiers
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
DX Engineering Portable Receive Preamplifier-Attenuator
DX Engineering Portable Receive Preamplifier-Attenuator DXE-NL-PRE-ATT-1 – A very handy device to use with your receiver; handheld, portable or base. This attractive, light-weight unit comes completely assembled and tested, and provides a nominal 30 dB gain across the frequency range from 100 kHz through 30 MHz. Powered by an internal 9 volt battery (not included), it features BNC connectors for RF Input and Output, easy to use slide switches and a 'power on' LED when the preamp is on. Attenuation is selected with switches for -10 dB or -20 dB and -30 dB with both. Plus, an AM Broadcast Band Rejection Filter can be switched in or out, as needed. This unit measures 3.25 x 7.00 x 1.00 in. (WHD) and weighs approx. 8.5 oz. with the user supplied 9V battery installed. This preamplifier has a Noise Figure (NF) of 4.5 dB. This Portable Preamplifier-Attenuator is a perfect companion device for use with the DXE-NOISELOOP WD8DSB Portable Receive Flag Antenna Kit, for RFI noise finding and for MW through SW receiving. NOTE: The DXE-NL-PRE-ATT-1 Portable Receive Preamplifier-Attenuator is a Receive Only device. Attempting to transmit RF into this unit will cause damage that is not covered by warranty.
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$175.99
DX Engineering Clifton Laboratories Z10046 High-Gain Preamplifiers
DX Engineering Clifton Laboratories High-Gain Preamplifiers are adapted, assembled versions of the circuit project kits developed by Jack Smith, K8ZOA (SK). This is our version, the DXE-Z10046B-PM High-Output Preamplifier with 23dB gain, which is virtually identical to its predecessor in specs and performance. This versatile module preamp can plug directly into the DXE-NCC-2 and DXE-RTR-2 units. Also, you can easily create a separate high-performance in-line receive-only preamplifier with the DXE-Z10046B-PM module installed in our DXE-DMC-2 Dual Module Chassis. The legacy built by Jack Smith, K8ZOA (SK) with Clifton Laboratories lives on with select products by DX Engineering.
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$109.99
DX Engineering Clifton Laboratories Z10000 Buffer Amplifiers
DX Engineering Clifton Laboratories Z10000 Buffer Amplifiers may be the products most often requested by radio experimenters and electronics enthusiasts. These are the very popular circuits, designed by Jack Smith, K8ZOA (SK), that are crucial for adding a SDR receiver and panadapter display capabilities to a receiver or transceiver which lacks that feature. The Z10000 Buffer Amplifier's high-input impedance can safely tap the early-stage broadband Intermediate Frequency (IF) signal from inside your radio and feed the buffered and amplified low impedance IF signal to your external SDR receiver. It can then produce a spectrumscope - waterfall display pattern of the receiver signals on a compatible tablet or monitor and PC that is running the appropriate third party SDR software. DX Engineering offers two Clifton Labs Buffer Amplifier Kits to add an IF output SMA connector to the rear panel of your radio: * The DXE-Z10000U-KIT is the Universal Buffer Amplifier Kit that covers 50 kHz to 100 MHz. This kit is designed for those willing to do an internal modification, and will output the IF signal of virtually any receiver or transceiver that has an IF in that range. However, the DXE-Z10000U-KIT can be used as a buffer and low-gain preamp between any low level RF devices that operate in that range. As a buffer, this circuit provides over 90dB of reverse isolation to protect the IF stages of the radio from possible birdies on an SDR receiver input. So, even if your radio has an IF output connector, the DXE-Z10000U-KIT may be used externally, with a user-supplied shielded metal enclosure, to be certain to maintain proper radio operation. * The DXE-Z10000K2-KIT is the Buffer Amplifier Kit specifically tuned to the 4.915 MHz IF signal of the Elecraft K2 transceiver. It offers the same high reverse isolation, plus the added benefit of a tuned IF input with a narrower bandwidth of operation and a potentially a lower noise floor on the output. Both Buffer Amp kits contain the updated, completely assembled and tested DX Engineering Z10000C PC Board with a nominal 6.5 dB gain, retaining all the benefits of the reliable original Z10000B boards. Both kits include our finished printed circuit board, required coaxial cables assemblies with special connectors, insulating materials, and hardware—all for an easier installation than ever before! A third party SDR receiver, software (typically free) and compatible tablet or PC and monitor are required to make use of the IF signal provided by the Z10000 Buffer Amplifier and see the signals that your old radio can hear. Due to the high number of specialized radio installations, no printed instructions are included with these buffer kits. Instructional web links are found on the part detail webpages. Installation web documents and videos are only available online. The legacy that was built by Jack Smith, K8ZOA (SK), with Clifton Laboratories, lives on with select products, exclusively from DX Engineering. NOTE: DX Engineering cannot provide electronic technical support of devices installed in user radios and is not responsible or liable for damages that occur to a user radio due to improper or erroneous techniques during the installation of this product. Unplug all electronic devices when working on them and observe all electrical safety and electrostatic discharge precautions when opening sensitive electronics. Modification of a radio should only be attempted by individuals with advanced experience on electronic circuit repair and operation.
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$51.99
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$61.99