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5 Results Found For "noise"
InnovAntennas 50MHz 9-Element LFA-KW Yagi
InnovAntenna 50MHz 9-Element LFA-KW HD Yagi is a giant. This 49 ft. long boom, low noise Loop Fed Array model achieves the Lowest Ever Noise Figure! The G0KSC LFA Yagi is a major step forward in the development of the Yagi Antenna, providing a low noise "front-end" for any advanced 50 MHz radio to easily hear weak signals. This amazing 9 element LFA provides stunning performance across the 50.0 – 50.4 MHz weak signal section of the 6m band. This antenna is hard to beat with a direct-feed 50 Ohm feedpoint, no matching losses and suppression of unwanted noise. EME reviews on the Internet confirm that this 9 element LFA is an excellent antenna. It's very highly suppressed side lobes in both H and E planes make this model ideal for very noisy city locations. For the 6 meter enthusiast who wants to beat the noise AND enjoy maximum gain and front-to-back performance, THIS is the 50 MHz Yagi for you.
Not Yet Reviewed
$2,000.00
PXdragon DR-9400 PACTOR Modems
PXdragon DR-9400 PACTOR Modems are the most advanced and powerful device of its kind in the world, ensuring reliable and efficient email and data transmission via HF and VHF. Whether in amateur or maritime radio, or crisis communication, stable data connections are crucial. This device represents the latest generation of professional PACTOR modems, continuing the success story of the DR series, confirming the long-term prospects and further development of PACTOR technology for worldwide amateur radio, maritime radio, and government and emergency radio applications. WHEN COMMUNICATION MATTERS, RELIABILITY IS THE ONLY THING THAT COUNTS. Developed by SCS and distributed by WiMo, the PXdragon DR-9400 supports PACTOR-1/-2/-3/-4, Packet Radio and APRS with 1200 bps AFSK and 9600 bps 3RUH and Robust Packet Radio. Reception modes such as Weather-FAX (RX) and RTTY (RX) and an integrated PACTOR monitor expand the range of possible applications. Its compact design makes the DR-9400 ideal for stationary and portable applications—perfect for email messaging, file synchronization, telemetry, or APRS beaconing. Modern signal processing, versatile interfaces, and robust protocols make the PXdragon DR-9400 a reliable solution for data-oriented radio operation, even in poor propagation conditions. Pre-assembled cables for common transceivers are available for easy operation, as well as customized solutions for every application. Key features • Multi-stage modulation methods (PSK, QAM) for maximum efficiency • Compatible with all older versions (PACTOR 1 to 4) • Secure connection with optional encryption • Automatic adjustment to signal strength and signal-to-noise ratio • EasyTransfer function for convenient file exchange via drag-and-drop • Direct integration with software such as Winlink Express, Airmail, and AlphaMail • High data rate: up to 10,500 bps with PACTOR-4 • Automatic repeat requests (ARQ) for 100% data integrity • Multiband support: operation on all shortwave bands (2–30 MHz) Choose between two versions of the DR-9400, with or without the WiFi and Bluetooth Dongle and license key. Add the premade control and audio interface cables listed in "Recommended Parts" that match your HF or VHF radio equipment for fast PACTOR mode operations.
Not Yet Reviewed
$1,999.99
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.
( 3 )
$1,999.92
PowerFilm Foldable Solar Panels
PowerFilm Foldable Solar Panels are perfect for keeping your batteries topped off when operating portable, or for any activity where you want to keep batteries charged without the noise of a generator. The weather resistant, nylon fabric on the back side of the panels provides protection regardless of if the panel is in use or whether it's presently being stored. While the cloth backing is weather resistant, if it gets wet it is best to let it dry before you fold the panel up and put it away. Grommets on the corners of the panel help secure it in place to prevent damage in high winds. These high tech thin and flexible panels will continue to provide output even when damaged. They generate electricity even in cloudy, shady, and hazy environments and outperform other solar panels in low-light environments. A charge controller is not required if the battery capacity is 100x greater (or more) than the panel output. For example, a 100Ah battery would not need a charge controller if the panel output is 1A or less. If a charge controller is required, it should be sized according to the output of the panel. Available in a range of output wattages from 20 to 220 Watts there's sure to be an option to meet your specific needs.
Not Yet Reviewed
$1,599.00
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$1,729.00
DX Engineering Receive Four Square Array V3 Systems
DX Engineering Receive Four Square Array V3 Systems, DXE-R4S-SYS-V3, dramatically improve reception of weak distant MW and SW signals with excellent rejection of extraneous signals and noise. This is a four-direction switchable phased array that is able to cover multiple HF Amateur bands, such as 160, 80 and 40 meters, by using time delay phasing of four physically short active receive vertical elements. The resulting directional receiving pattern has deep back and side nulls that are superior to Beverage antennas and other receive arrays. The DX Engineering Receive Four Square Array is less susceptible to high angle signals than EWE, Flag, Pennant, K9AY and SAL antennas. Short vertical element receive arrays limit interfering signals and noise for dramatically superior weak signal reception, as compared to full size transmitting antennas and arrays. With the appropriate location and spacing of the four stealthy 8.5 ft. (2.6m) vertical elements, the Receive Four Square Array V3 System is a high performance, directional receive antenna for HF Amateur, SWL or AM DXing. Click or tap the title of a listed item for an overview - a complete description, Specifications, Required and Suggested Parts. Links to instruction manuals and charts appear in Documentation. DX Engineering Receive Four Square Arrays offer directional performance comparable to four long Beverage wire antennas, while using far less land area. In the appropriate clear area, away from metal, structures and other antennas, each of the four Actives simply mount inches above the earth onto a ground rod. Each element is installed on the corners of the array square with sides that are one-eighth to one-quarter wavelength on the lowest band. For example, the optimized Receive Four Square Array for 160, 80 and 40 meters has elements spaced 70 ft. apart. The DXE-R4S-SYS-V3 system includes the DXE-RFS-3 Receive Four Square Array Controller, four Receive Short Element Active Vertical Antennas, DXE-RSEAV-1, featuring the new DXE-AVA-3 Active Matching Units, insulating mounting plates and stainless hardware. These Active Antennas are packed in a 38 x 5 x 5 in. carton for lower shipping cost. Three sections of 3 ft. aluminum tubing, 0.500, 0.375 and 0.250 inch OD, assemble to a height of only 8.5 ft., so each self-supporting element is truly stealthy. This complete array system also includes the DXE-EC-4 Directional Control Console, one 1,000 ft. roll of quality RG6U cable, all cable prep tools, connectors and hardware for construction of the array. Required ground rods and control cable are purchased separately. Build an exceptionally effective, electronically rotatable, stationary receive antenna that lets you hear the DX signals that cannot be heard on a transmit antenna. Dig the weak signals out of the noise with an antenna that can help make your station one of the best. Order and install the DX Engineering Receive Four Square Array V3 System.
( 3 )
$1,929.39