Availability
30 Results Found For "noise"
Yaesu DC Adapters and Cables
Yaesu DC Adapters and Cables are available for several models to keep your portable radio charged and running. Most of these cables will plug directly into the portable radios, and some will plug into a charging cradle, sold separately. Yaesu DC Adapters and Cables are available to keep your radio on the air.
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$37.99
ICOM Handheld Cigarette Lighter Cables
Keep your radio powered at all times with one of these ICOM handheld cigarette lighter cables. Available for several models, these cables will plug directly into some handheld radios, and others will require a charger unit, sold separately. Regardless, ICOM handheld cigarette lighter cables will keep you powered or charged and operating for hours.
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$46.99
SOTAbeams Inline Audio Ground Loop Isolator
SOTAbeams Inline Audio Ground Loop Isolator can solve some audio problems caused by RF on the line. This is passive audio transformer device that breaks the ground loop that may be contributing to RFI in your receive audio. Here are the particulars: •Ideal for connecting portable devices including smartphones, tablets and laptops to external sound gear •In-line dual isolation transformer eliminates hum, buzz and other noise caused by ground loops, while providing protection to the portable device •Stereo in and out Input: 1 x 3.5 mm male stereo plug Output: 1 x 3.5 mm female stereo jack •Isolation transformer housed in a slim, in-line cylindrical metal enclosure for best shielding •Highly flexible cable is terminated with rugged molded connectors with strain reliefs •Input/output impedance: 600 Ohms - perfect for all line level audio devices •Frequency range: 0 - 0.5dB (input to output), 50 Hz - 20 kHz •Distortion: <0.02% @ 1 kHz, 0 dBu •Cable Length: 11 in. (0.3 m)
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$23.99
DX Engineering Ferrite
DX Engineering Ferrites are partially magnetic metal and ceramic mixes available in a variety of forms, including toroid core, bead type and plastic-covered split-bead ferrite called snap-beads. They are used in a myriad of RF suppression applications to mitigate RFI (radio frequency interference) as well as to reduce pulse and other types of RF noise interference. Special ferrites are used for experimentation and electronic circuit building and for making transformers, RF chokes and antenna baluns. The variations of magnetic and non-magnetic metals and non-metal ceramics used to make ferrites are called "Mixes" and each has different radio frequency properties or ranges. Therefore, different mix number ferrites are typically used for different applications within those ranges, determined by decades of experiments by engineers and applications by hams. Each Mix has been assigned a color code to help identify the ferrite, so numerical labeling is not used on the metal. Color coded ferrite can be identified long after the numbered package is discarded or has disintegrated with time. How do they work? Simply use snap-on beads on a cable or wire. An even more effective choke takes a few to several turns of a wire or cable through and around a ferrite snap-on bead or toroid core. This mitigates RFI to, or from, the connected RF noise producing or noise affected electronic device. The results can be very surprising. Solving noise and RFI can be frustrating. Due to the nature of RF and noise interference suppression; the techniques of appropriate use of ferrites can take a bit of trial and error, but are often the best solution for a difficult problem. Use DX Engineering Ferrite for an incredible range of electronic circuits, noise abatement and RF suppression projects. The details of DX Engineering Ferrite mixes and types appear in each product description. Sizes and applications are discussed in "More Details" and in the literature available at the "Documentation" tab of each of these products.
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$27.99
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$49.99
DX Engineering Coaxial Connectors
The DX Engineering Coaxial Connectors shown here include two-part, silver-plated PL-259 and Type-N connectors designed to be crimped or soldered to the shield and soldered to the center conductor. These connectors deliver excellent performance for HF, VHF, and UHF applications. DX Engineering's PL-259 and Type-N connectors feature silver-plated brass throughout the outer and inner conductors and use PTFE dielectric—the best RF insulator—for very low loss and high electrical breakdown strength. Also available are DX Engineering Silver-Plated Reducers, which adapt standard solder-type PL-259 and Type-N connectors for use with single-shield RG-8X and RG-58U coaxial cables. While many types and grades of coaxial RF connectors are offered on the market, DX Engineering provides only top-quality connectors with silver-plated brass bodies and PTFE dielectric. These two-part solder-style connectors fit RG-213, RG-8U, RG-8X/LMR240 and other standard 0.405 in. single-braid shield coaxial cables intended for soldering*—but not 400MAX or LMR-400 double-shield cables. These solder-shield and solder-center connectors are the preferred choice for many Amateur Radio operators installing single-braid shield coaxial cables. Order your DX Engineering Coaxial Connectors and Reducers today! *NOTE: To prevent noise issues, modern engineering practice has determined that double shield cables that have one foil and one braid should not be soldered to the braid, including DXE-400MAX and LMR-400 style cables. Those cables should be terminated with crimp shield or clamp shield style connectors, also available from DX Engineering.
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$39.99
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$43.99
Heil Sound Microphone Adapter Cables
Superior-quality Heil Sound Microphone Adapter Cables, CC-1 series, are used to connect your Heil microphone to your favorite transceiver. There are two types of cables available for the two types of Heil microphones, 4-pin XLR and 3-pin XLR. Both adapter cable types feature the PTT mono 1/4 inch (6.35mm) jack at the transceiver mic connector for a foot switch or hand switch. Heil Sound Microphone Adapter Cables are available with round 8-pin, round 4-pin and 8-pin modular-style connectors for most transceivers. Most Heil Microphone adapter cables feature the special 4-pin XLR connector to serve the Heil microphones that have a built-in PTT switch. They work with the Classic, Goldline, GM, HM-12 Genesis, Handi-Mic, HM-10XD and HM-10 microphones. Use of an external foot or hand switch is optional. Conversely, the cables with the letters "XLR" in the part number have the audio industry standard 3-pin XLR microphone connector. These cables are required for the "PR" PRO Series microphones such as the PR-20, PR-28, PR-40, PR-781 and several others. Since these mics have no PTT switch, they require the use of an outboard hand or foot switch connected to the adapter cable PTT jack. Features and benefits of Heil Microphone Adapter Cables compared to others: * 100 percent silver-braid shield... keeps noise OUT * PTT control lines are OUTSIDE the shield... eliminates stray coupling * Made using commercial-audio grade 'Heilwire'... strong and supple * 18-gauge wire; not 22 or 24 like others... lower cable resistance * Commercial-grade microphone connectors (patent pending)... lasting durability * Heil dual-exit cable clamps are heavier than normal connectors... robust reliability * Outstanding engineering... lowest-noise transmit audio The XLR connector's quick-disconnect feature lets you easily move your Heil microphone from transceiver cable to transceiver cable, at the microphone end, without having to rewire a boom or remove any connectors from the transceivers. Additionally, all Heil audio cables are wired through to support VOX operation. Don't attach a high-quality microphone to cheap cable! Order your Heil Sound Microphone Adapter Cables from DX Engineering and transmit the best audio possible!
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$30.00
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$49.00
Yaesu SSM-BT20 Bluetooth Mini Headsets
Yaesu SSM-BT20 Bluetooth Mini Headsets represent an ideal choice for those in pursuit of untethered communication. They boast a streamlined design, suitable for handheld radios and mobile phones and offer seamless, interference-free communication. This state-of-the-art Bluetooth headset is compatible with an extensive array of devices, including the Yaesu FT-3DE, Yaesu FT-3DR, Yaesu FTM-300DE, Yaesu FTM-300DR, Yaesu FTM-6000E, Yaesu FTM-6000R, among others. The SSM-BT20 model is equipped with a high-grade microphone, integrated with a multi-functional PTT button that can also be utilized to answer mobile phone calls. It features two volume buttons, a status LED, and two interchangeable earphone inserts with detachable open ear hooks, ensuring maximum comfort. The headset is specifically engineered for environments with low to normal noise levels. The Bluetooth headset is capable of transmitting audio up to approximately 32 ft. (10 meters) with excellent quality. This implies that the radio or mobile phone does not necessarily need to be always carried on the person. However, it is recommended to test the range in the specific environment of use to guarantee signal quality. The SSM-BT20 Bluetooth headset is supplied with a USB charging cable, enabling charging via any USB port. Whether it's a USB power adapter, USB cigarette lighter adapter, computer, notebook, or power bank, the headset can be charged with ease and convenience. Additional Features and Specifications: -Bluetooth version Ver 4.1 (profiles HSP, HFP), max. 32.81 ft. (10m) range (class 2) -Built-in lithium polymer battery -Intelligent Noise Reduction -Standby time with one battery charge: up to 400 hours -Talk time on one battery charge: up to 12 hours (continuous talk) -Dimensions: 2.362 x 0.866 x 0.591 in. (60 x 22 x 15mm) -Operating temperature: -4° F to 140° F (-20 to +60 degrees Celsius) -Charging temperature: 32° F to 113° F (0 to +45 degrees Celsius)
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$49.99
Heil Sound HTH Series Handie-Talkie Headsets
Now you can have Heil Sound quality for your HT! Heil Sound HTH Series Handi-Talkie Headsets are single-sided or double-sided lightweight headsets with adjustable boom mics, designed for use with many popular handheld transceivers. These headsets provide hands-free and discreet two-way communication while maintaining the comfort necessary for extended use in moderate noise environments. The single-side models feature a left or right ear adaptable earpiece and both single and double include an in-line Push-to-Talk switch. HTH and HTHD headset details: * Microphone Element: Electret * Frequency Response: 100 Hz to 10 kHz * Polar Pattern: Omni * Impedance: 2.2 k ohm * Weight: 2.7 oz. * Required Adapter: None** HTH Series headsets are available with three pin-out configurations- ICOM, Yaesu, and Kenwood/Baofeng. HTH-I and HTHD-I: Works with 2-pin Icom HTs and IC-705*** HTH-Y and HTHD-Y: Works with single pin TRRS Yaesu/Vertex HTs (not FT-25, FT-65 and not FT-4XR)** HTH-K and HTHD-K: Works with 2-pin Kenwood/Baofeng HTs, no adapter cable needed **For the weather-resistant Yaesu/Vertex models, such as the VX6R and VX7R, use the HTH-Y or HTHD-Y headset and a Heil HTH-ADY adapter cable. Works with Yaesu CT-131 for VX8DR. ***For HTH-I and HTHD-I used with ICOM HTs having 2-pin plugs, no adapter cable is needed. HTHD-I is compatible with the Icom IC-705, in its very tight fitting plug location; use caution and care when unplugging. Hams around the world have used Heil products on their HF base transceivers for decades. Now you may add Heil technology to your portable radio. Order Heil Sound HTH Series Handi-Talkie Headsets from DX Engineering for your HTs!
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$45.00
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$49.00
Radio Today Guide To The Icom IC-7300MK2
Radio Today Guide to the Icom IC-7300MK2 By Andrew Barron, ZL3DW Since its introduction in 2016, the Icom IC-7300 has become one of the most popular transceivers in amateur radio. Building on the success of the original, the new IC-7300MK2 introduces enhanced performance, updated specifications, and new features that further elevate this industry-leading radio. In this comprehensive guide, renowned author and amateur radio operator Andrew Barron, ZL3DW provides practical, easy-to-follow instruction to help operators get the most from their IC-7300MK2. The original IC-7300 brought advanced technologies previously found only in much more expensive transceivers to a wider audience. The IC-7300MK2 builds upon that legacy with notable receiver and transmitter performance improvements, including enhanced Reciprocal Mixing Dynamic Range (RMDR) and reduced transmitted phase noise. These improvements help the radio better handle strong nearby signals, resulting in improved operating performance in crowded band conditions. New features include an integrated CW decoder, reduced heat generation through revised circuitry and DC power optimization, and an HDMI output that provides both video and audio for external displays. The radio's popular 4.3-inch touchscreen has also been upgraded from a TFT LCD to an IPS (In-Plane Switching) display, delivering improved color accuracy, wider viewing angles, higher contrast, sharper image quality, and faster response times. As with all Radio Today guides, this book goes far beyond simply repeating the information found in the owner's manual. Instead, it focuses on practical setup, operation, and optimization of the radio's many capabilities. Readers will find detailed guidance on configuring operating modes, setting up digital communication software such as FT8, troubleshooting common issues, and unlocking the full potential of the IC-7300MK2. Whether you already own the Icom IC-7300MK2 or are considering adding one to your station, the Radio Today Guide to the Icom IC-7300MK2 is an invaluable resource filled with practical advice, expert insights, and real-world operating knowledge that will help you get the most from this exceptional transceiver.
Not Yet Reviewed
$25.99
Chelegance MAT-50 HF Mobile Antenna Magnetic Grounding Mats
Chelegance MAT-50 HF Mobile Antenna Magnetic Grounding Mats are designed to be attached to the roof or metallic parts of the vehicle, providing effective grounding for vehicle mounted HF mobile antennas. This capability reduces antenna SWR, enhances reception, and helps to reduce noise.
Not Yet Reviewed
$41.99
bhi Extension Speakers
bhi Ltd Extension Speakers are robust, well made speakers that are suitable for use with bhi in-line DSP modules or as a standalone external speaker for your radio. For a standard, non-DSP external speaker, choose from these three rugged, high-quality bhi models: * EXTSPK25 * LSPKR * SPKR8 Details on each appear below: * EXTSPK25 features: -- This model is destined to be considered as one of the best sounding passive Extension Speakers on the market! The EXTSPK25 is a top-of-the-line 8 ohm two-way passive speaker for the shack. It is a well-crafted large speaker which is essentially the same as the bhi DESKTOP model, but without the built-in DSP and power amplifier. Perfect for direct connection to DSP units with audio power amplifiers such as the bhi EQ20, it may also be connected directly to a transceiver. The EXTSPK25 features a 4 in. bass driver and a 1 in. tweeter for excellent audio. It connects with most transceiver and receiver standard mono "external speaker" output or a DSP unit speaker output. * LSPKR features: -- Large, full range 4 in. mobile-style extension speaker -- Adjustable mounting bracket that also serves as a stand -- 20 watts power handling -- 4 Ohm impedance -- 78 in. integral cable with 3.5mm mono plug * SPKR8 features: -- Compact, 3 in. communications speaker -- Pedestal stand--flat surface mount with speaker angle adjustments -- Passive Noise filter -- Frequency 100 to 10KHz -- 8 watts power handling -- 8 ohm impedance -- Integral cable with 3.5mm mono plug -- Dims: 3.54 x 3.58 x 5.28 in (90 x 91 x 134 mm) -- Weight: 1.2 lbs. (0.56Kg)
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$49.99
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
Stealth Antennas for Ham Radio
Stealth Antennas for Ham Radio is the ultimate guide for amateur radio operators navigating restrictive environments. Whether you're dealing with HOA rules, small lots, or simply prefer a low-profile setup, this book offers practical solutions to keep you on the air without drawing attention. Inside, you'll discover 28 discreet antenna designs tailored for covert operation, including multiband verticals disguised as flagpoles, end-fed wires hidden along rooftops, and even the innovative Ham Walking Stick for portable repeater access. Author Steve Ford, WB8IMY, opens the book with essential guidance on safe, ethical, and effective stealth operation. He shares expert tips on minimizing noise, maximizing performance, and making the most of compromise antennas. From compact inverted Ls to creative concealment techniques, this book empowers hams to operate confidently and quietly—no matter where they live. These 28 unobtrusive stealth antennas will get you on the air and making contacts without raising any concerns. Try them out today.
Not Yet Reviewed
$22.95
KE7X Books The Successful Ham Radio Operator's Handbook--Best Practices for all Hams
"The Successful Ham Radio Operator's Handbook--Best Practices for all Hams" By Fred Cady, KE7X and Vic DiCiccio, VE3YT This book helps new operators and returning old-timers learn about the breadth of exciting ham radio activities and challenges available today. The book includes: * How the radio works, including new architectures, such as software defined radio technology and direct sampling receivers. If you understand how a noise blanker or roofing filter or AGC works, you can use these features successfully. * The excitement of different facets of ham radio, including explanations of digital modes, weak signal VHF, public service and emergency preparedness, DXing, mobile operations, and how to get permission to operate abroad. * How to easily make your own dipoles and verticals, and how to feed your antenna, including types of baluns, how they work and how to make them, and how to select coax. * How propagation works, and what to do if you're having trouble making QSOs. If you're looking for a fast way to get up to speed on the many facets of amateur radio, order "The Successful Ham Radio Operator's Handbook--Best Practices for all Hams" from DX Engineering!
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$44.99
DX Engineering TWIG Broadcast Interference Filter
Improve the performance of your QRP POTA or SOTA station with the DX Engineering DXE TWIG BCFIL Broadcast Interference (BCI) Filter. Engineered specifically for low power amateur radio applications, this compact module effectively attenuates strong AM broadcast band signals below the 80 meter amateur band. By suppressing these out of band signals, the filter helps lower your receiver's noise floor, resulting in cleaner, more reliable reception of weak amateur radio signals. The DXE TWIG BCFIL is equipped with BNC female connectors for quick, in line installation in the field. Ideal for portable, field, and low power fixed station use, it provides an effortless way to reduce unwanted broadcast interference without adding complexity to your station setup. Features: • Blocks strong AM broadcast band and 1.8 MHz signals below the 80 meter amateur band • Improves receiver noise floor and enhances reception of desired signals • Designed for low power transceivers • Compact in line module with BNC female connectors for easy installation • Ideal for portable POTA and SOTA, mobile, and fixed low power stations Power Rating: For QRP use only — maximum 20 watts PEP. Not suitable for high power transceivers.
Not Yet Reviewed
$49.99
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
bhi Ltd PSU12-2A-WW Universal 12 V DC Power Supply
bhi Ltd PSU12-2A-WW universal 12 V DC power supply is a 2 ampere switch mode power supply that accepts 100 to 240 V AC input. This is a handy, true 12 V wall supply that includes standard USA, UK, European, and Australian plug adapters. It carries full International safety approvals, making it suitable for world use. The engineers at bhi tested it to ensure that it performs well and is a good quality, low noise power supply that works well with all of their main DSP noise cancelling units. Specifications of the bhi Ltd PSU12-2A-WW universal 12 V DC power supply: * Output: 12 V DC, regulated (2 amp max) * Current minimum: 0.01 amp * Rated input voltage 100 to 240V AC * Rated frequency: 50 to 60Hz * Line regulation: +/-5 percent at rated load * Total output regulation: +/-5 percent at 0 to 100 percent load * Ripple and noise: (mV p-p) 120mV P-P * Over current and short circuit protection * Case size WHD: 2.047 x 4.134 x 1.574 in. (52 x 105 x 40mm) excluding AC pins * Weight: 9.17 oz. (0.26 kg) * DC cord: 70.87 in. (1.8 m) * DC plug 2.1 x 5.5 x 12mm, positive center pin * Efficiency meets ErP Stage 2 no-load power consumption * Maximum operating temperature: 0 to 40 degrees C * Storage temperature: -20 to 80 degrees C * Operating humidity: 10 percent to 90 percent * Safety approvals: CE, TUV, C-Tick, cUL * MC standards: EN55022:2006+A1:200/EN6100-3-2/EN6100-3-3
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$39.99
DX Engineering Exhaust Grounding Kits
Eliminate stubborn noise in your mobile installation with DX Engineering Exhaust Grounding Kits. Many modern vehicles have individual injectors and spark plug coils for each cylinder. These units can create substantial pulses on the vehicle wiring against the ground system. Engine blocks often have a poor ground, so anything attached to them can become a radiator. The exhaust pipe is directly bolted to the engine and can be excited just like an antenna, radiating the pulsing noise. By using one of our exhaust grounding kits, you can eliminate noise from your mobile installation. All hardware in these kits is made from high quality stainless steel. Each kit includes: * Exhaust saddle clamp * 14 in. long x 0.75 in. wide x 0.125 in. thick tinned copper braid * 3/8 x 1 in. bolt * 3/8 nut * Three 3/8 external tooth washers * 3/8 flat washer * 3/8 split washer
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$31.99
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$34.99
EMC and RFI Know How
Many radio amateurs have Electromagnetic Compatibility (EMC) issues or, as it is more commonly referred to in the US, Radio Frequency Interference (RFI). As a scourge of our time, there's been much written about this topic as to cures, identifying the problems, and much more. "EMC and RFI Know-How" sets out to draw this material together and provide valuable insight into an area considered by many to be one of the most important problems facing amateur radio today. This 208-page paperback draws on expertise from across the world and includes material from the UK, USA, Germany, Greece, and the Netherlands. You'll find sections dedicated to sources of interference such as lighting, xDSL, renewable energy, air conditioners, air source heat pumps, power line noise, and power supplies and chargers. "EMC and RFI Know-How" also takes the reader through practical ways of defeating the problem of interference. Home constructors are well catered for with the circuit of an HF receiver suitable for direction-finding, a preselector to eliminate interference from powerful broadcast stations, filters to stop breakthrough to TVs, and even a 'QRM-Eliminating' antenna. Advice is also given on how to prevent breakthrough from amateur transmissions spoiling the family's enjoyment of television programs! The average home contains numerous electronic devices that can potentially cause interference in the amateur radio spectrum. "EMC and RFI Know-How" takes a detailed look at how this interference can occur—and how it can be defeated. This an essential book for every radio amateur's library.
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$20.99
Portable Antennas for Everyone
Portable operating has never been as popular as it is today, thanks to the many excellent modern, small, and lightweight transceivers that are available. But indoors or outside, any station is only as good as its antenna, and that's where this book comes in. "Portable Antennas for Everyone" is broken into sections covering the main types of antenna. Specific designs from around the world are included, starting with a fiberglass pole and a simple 10m length of wire attached to make a quarter-wave vertical antenna for 7MHz. The 192-page paperback continues into verticals designed specifically for use by the ocean and that provide a super-low angle of radiation of just 6 or 7 degrees above the horizon. This book describes how to make a vertical dipole array (VDA), and there's some good advice on kite-supported verticals. You'll also see designs for HF dipoles, doublets, and making your own lightweight HF beams. VHF and UHF antennas are not forgotten: the book includes a dual-band Yagi for satellite working, collapsible 2m and 6m beams, a roll-up J-pole, a 70cm Lindenblad antenna, and even a dual-band beam made from tape measures. Read reviews of commercially made antennas for portable operations—such as the Spiderbeam, the ultra-lightweight Hexbeam, the folding Hexbeam, the all-band SuperStick, an easily transportable magnetic loop, and much, much more. If you're suffering from high domestic noise levels at home, operating portable from the countryside can be a real revelation. Often there is no local noise whatsoever and you find you can copy S1 signals with ease. So now there's no excuse: "Portable Antennas for Everyone" allows everyone to get on the air while experiencing the great outdoors!
Not Yet Reviewed
$23.99
bhi Ltd Mini Switch
No more messing around with cables! The new bhi Mini Switch is a compact two-way switch box enabling the connection of two radios to your bhi DSP noise cancelling product. Supplied with two 3.5mm mono audio cables, they're ready to connect to your radios! The Mini Switch features two mono 3.5mm input jacks, one 3.5mm mono output jack and one cable with 3.5mm mono plug. It is supplied with two ALD-001 3.5mm plug to plug cables! Power handling is 3 watts maximum and the unused input is always terminated with a load to protect your audio outputs. Velcro pads are supplied to securing of the Mini Switch to your radio equipment. All connections are 3.5mm mono and audio adapters will be required to convert other types of connections. Note: Whenever the DX Engineering "Documentation" tab is available, please look at the associated files for additional product information. The Mini Switch is a compact 2.09 x 1.46 x 1.73 in. (53 x 37 x 44mm) so it will fit just about anywhere in you operating position. You normally use one rig at a time. Switch one DSP unit between them with bhi Ltd Mini Switch units from DX Engineering!
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$42.99
Clearance
bhi Bypass Switch
bhi Bypass Switch is an audio bypass switch for the bhi Dual In-line and Compact in-Line DSP noise cancelling units, which don't have an internal audio bypass facility. When you switch the power off on these bhi units, the audio does not pass directly through to your external speaker. So, with the Bypass Switch, you can route the audio from your radio directly to your extension speaker without powering on your bhi unit. This can be particularly useful if you just want to listen to your radio without your bhi noise cancelling unit switched on. A single push-button switch on the Bypass Switch provides this facility. Press the button in and the audio routes through your bhi DSP noise cancelling unit (power on). Press the button again and the switch returns to the out position and the audio is routed directly from your radio and loudspeaker. bhi Bypass Switch features: * Complete audio bypass of bhi DSP unit * Latching switch: In--DSP audio, Out--Bypass audio * Four 3.5mm mono jacks * Two 3.5mm mono plug patch cables * Audio power 5 watt RMS max * Unit Dimension, WHD: 3.150 x 1.969 x 0.866 in. (80 x 50 x 22mm)
Not Yet Reviewed
$54.99
$43.99
YCCC Receive Feedline Choke Kits
Closeout- Other YCCC array components are no longer available YCCC Receive Feedline Choke Kits prevent common-mode noise or unwanted signal intrusion on the feed lines of YCCC Receive Vertical Array Kits. These choke kits are the same as provided in the array kit packages and may be used as replacements or in other applications. Component-level assembly of these kits is required. A choke enclosure is user supplied. Their function is to provide isolation between the input and output coaxial shield connections, while passing desired receive or control signals. Their isolation impedance blocks common-mode noise or unwanted signals. YCCC Receive Feedline Choke Kits are supplied with standard "F" female connectors to prevent connection to transmitting equipment. All inquiries and technical support for the discontinued YCCC kits and kit packages is handled by e-mail only, typically within two to three business days: yccctechsupport@verizon.net
Not Yet Reviewed
$22.00
Hi-Z® Antennas DL-4 V2 Long and Short Delay Cables
Hi-Z® Antennas DL-4 V2 Long and Short Delay Cables are essential components for the Hi-Z 4 Element V2 4 Square and Hi-Z 8 Element V2 Multi-Band 8 Circle Receive Array Systems. These are the high quality RG-6U coaxial cables that are precision tuned by DX Engineering and terminated with compression-style weather resistant male F connectors. These Hi-Z DL4 V2 Delay Cables must be selected and purchased separately, depending upon the desired array band coverage and corresponding size of the array, detailed below. Each are permanently connected to the 4 Square or 8 Circle Phase Controller "Long Delay" and "Short Delay" female F connectors upon array installation. SMALL ARRAY dimensions for maximized multi-band reception require the selection of one HIZ-DL-4-60-85L (Long) and one HIZ-DL-4-60-85S (Short), as recommended by Hi-Z for: * 4 Square Array with element side spacing of 60 ft. * 8 Circle Array with a diameter of 85 ft. Overall excellent cardioid patterns are achieved for enhanced, low noise reception on all three low band bands--160, 80, and 40 meters with very good receiving results on 30 meters as well. LARGE ARRAYS that are dedicated for ONLY 160 and 80 meters, one HIZ-DL-4-80-113L and one HIZ-DL-4-80-113S are for: * 4 Square Array with element side spacing of 80 ft. * 8 Circle Array with a diameter of 113 ft. Large array spacing and longer delay cable allows the user to manipulate the achieved patterns and the resulting Receive Directivity Factor (RDF) for their desired band coverage optimization. This also requires the change of four jumpers inside the respective phase controller. See the array phase controller instructions for details on jumper settings for alternative delay lines, patterns and performance.
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