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Unified Microsystems Parts and Accessories
Unified Microsystems Beverage Antenna Transformers
Unified Microsystems Beverage Antenna Transformers are now available. UMS transformers are built with stainless steel hardware and an F-Type coaxial connector. These transformers are fully enclosed for ultimate protection from the elements. They are corrosion resistant and sealed for many years of trouble-free use. Unified Microsystems Beverage transformers should be used with 75 ohm cable, typically RG-6, 6UF, F-6, or equivalent. H. H. Beverage described his "Wave Antenna" (the first Beverage) in the November, 1922 QST Magazine. Beverages are classic designs with well-defined characteristics and time-proven performance. Beverage antennas are among the simplest of high signal-to-noise-ratio antennas to construct. Make Unified Microsystems Beverage Antenna Transformers part of your receive-antenna system. Get yours from DX Engineering today!
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$37.95
United Microsystems BT-75/BOG Beverage-On-Ground Antenna Transformers
The United Microsystems BT-75/BOG Beverage-on-Ground (BOG) Antenna Transformers are specifically designed for Beverage-on-Ground receive antennas and is based on the proven BT-75 transformer used with elevated Beverage antennas. Because BOG antennas are installed directly on or just above the ground, they require no supports and can be significantly shorter than traditional Beverage antennas, making them a practical option where space is limited. BOG antennas typically exhibit lower impedance than elevated Beverage antennas. The BT-75/BOG is optimized to provide proper impedance matching between the antenna and 75-ohm RG-6 coaxial cable, improving performance compared to standard Beverage transformers. For correct operation, the far end of the antenna must be terminated with a 250 to 300-ohm resistive load. The United Microsystems RXT-270 termination resistor is recommended. Properly installed Beverage antennas are low-noise, receive-only antennas that provide excellent rejection of signals and noise from the undesired direction. Due to the lower velocity factor of radio waves near the ground, a BOG antenna can often deliver a radiation pattern similar to an elevated Beverage antenna of roughly twice the length, though with reduced signal strength. A BOG antenna as short as 150 to 200 feet can provide effective receive performance, although a preamplifier may be beneficial in some installations. The BT-75/BOG is designed for use with 75-ohm RG-6 coaxial cable. Originally developed for television applications, RG-6 offers low loss at VHF and UHF frequencies, resulting in extremely low loss on the 160, 80, and 40-meter bands. Its availability and low cost make it a popular choice for low-band receive antenna feed lines. The transformer is housed in a NEMA-rated enclosure with stainless steel hardware for long-term outdoor durability. A built-in gas discharge tube across the antenna terminals helps protect the transformer from nearby lightning-induced surges, although it will not provide protection against direct or very close lightning strikes.
Not Yet Reviewed
$37.95
Unified Microsystems Band Decoder/Antenna Selector Modules
Unified Microsystems Band Decoder/Antenna Selector Modules are important components if you are building your own automatic antenna switching system. These modules include the switching logic and relay drivers to easily interface between your Elecraft K3, Yaesu radio or computer, and the antenna switches. Use the BCD-14 to decode band switching for up to 14 relays. The BCD-14 modules decode the band select signals from your radio or computer to automatically select the proper antenna or band pass filter for your chosen band of operation. The module's inputs are optically isolated to provide maximum isolation between your radio or computer and the antenna switching system. Module outputs are grounding-type open-collector relay drivers. If the antenna or filter switch you wish to control requires high-side drivers, add the optional HSD-9 module. One output per band will be active, depending on the input signals. However, outputs may be wired to select a single antenna for multiple bands. For example, one relay may be used to select your tri-bander. With two jumpers installed on the BCD-14, that relay will be activated whenever your radio is set to any one of that antenna's three bands. The BCD-14 covers all bands, 160-10 meters, including the WARC bands plus 6 meters, 2 meters, and 440 MHz. The BCD-14 boards have corner mounting holes, but hardware, enclosures and antenna relays are user supplied. Why risk transmitting on the wrong antenna or put yourself in the position to require manual selection at all? Use this economical Unified Microsystems Band Decoder/Antenna Selector Module from DX Engineering, to build your automated antenna selector system!
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$23.99
Unified Microsystems RXT Terminating Resistors
Complete your receive antenna system with Unified Microsystems RXT Terminating Resistors. These resistors are designed to handle tough environments. Housed in NEMA-class enclosures with stainless steel hardware, their integrated flanges make mounting easy and secure. The 2 watt ceramic resistors are non-inductive, conformal coated, and protected by gas discharge tubes against surge and lightning strikes. Three models are available for different types of receive antennas: 270 ohm, 470 ohm, and 1,000 ohm. Enclosure dimensions: 2.0 in. wide, 3.2 in. deep, 1.4 in tall Many years of inquiries for an enclosure for the Beverage and other receive antenna terminations have been answered! Order Unified Microsystems RXT Terminating Resistors from DX Engineering today!
Not Yet Reviewed
$21.99
Unified Microsystems XT-4Beacon MK 2 CW ID Keyers
Unified Microsystems XT-4Beacon MK 2 CW ID Keyers are a versatile, board-level product that's ideal if you are working on a project that requires a CW IDer or beacon. Setting up your ID message is a breeze. Simply connect your CW paddle, and you're ready to start transmitting and you can easily program a new message whenever you need to.
Not Yet Reviewed
$34.95
Unified Microsystems SCI-6 PC Sound Card Interface Kits
Unified Microsystems SCI-6 PC Sound Card Interface Kits are an affordable option to get you on PSK31, RTTY, WSJT, EchoLink, and other exciting digital modes by utilizing your PC's internal sound card. These SCI-6 interfaces are your ticket to cutting-edge digital communications developments. Their design incorporates transformer isolation on both transmit and receive audio. The PTT circuit interfaces to a PC serial port through an opto-isolator to generate automatic transmit/receive control. Since the computer PTT-out pulls high, these SCI-6 interfaces require no external power source. These SCI-6 kits also make a great club project! Give your members some kit-building experience, as well as an introduction to new modes. These kits contain a high-quality, double-sided circuit board with a solder mask and component legends for easy assembly. Unlike other low-cost kits, a machined case is included. For convenience, the cables to your PC's sound card are included. You supply the cables to your particular model of radio. RCA phono connectors make it easy for you to customize the remainder of the connections to your radio. Software for many of the digital modes can be downloaded from the Internet at no cost. When using a PC sound card for digital modes, you may inadvertently transmit sounds generated by your operating system. PC-based sounds can usually be eliminated by a settings change. Please see our images for an example of how to eliminate PC sounds. SCI-6 features: * TX audio: transformer isolation * RX audio: transformer isolation * PTT: optical isolation * Power requirements: None * Size: 2.5 in. wide, by 2.5 in. deep, by 1.0 in. high Note: For additional product information, please look at the files under the "Documentation" tab. Order one of these Unified Microsystems SCI-6 PC Sound Card Interface Kits from DX Engineering and get on the air NOW!
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$29.95