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256 memories enable the _AT-AUTO_ to recall settings across multiple bands, making it efficient for operators who frequently change frequencies. The tuner is compatible with various antennas and amplifiers, such as the Mercury LUX, and integrates seamlessly with radios like the FLEX 6400 using an RS232-USB connection. This integration allows the tuner to follow frequency changes without additional input, enhancing operational efficiency. Despite being out of production, the _AT-AUTO_ remains supported by Kessler Engineering, which offers firmware updates and repair services. The tuner features a cross-needle SWR meter, providing quick visual feedback during tuning. It also includes a QRO keyline circuit to protect amplifiers during tuning. Users appreciate the tuner's ability to track radios via CAT control, avoiding automatic tuning during QSOs, a common issue with other models. The _AT-AUTO_ is praised for its durability and performance, with many users noting its reliability over years of use. Its ability to handle legal limit power and its balanced line output make it a versatile choice for serious operators. Although it lacks some features like multiple coax outputs found in other models, its robust build and continued support make it a valuable tool for HF enthusiasts. -
Fast Scan Amateur Television in Alabama, Arizona, Northern California Southern California, Georga, Illinois, Indiana, Kentucky, New Mexico, Nevada, Texas, Washington, Delaware, Maryland, New Jersey, and Pennsylvania -
The Burlington Amateur Radio Club (BARC) provides a community hub for amateur radio operators in Burlington, Ontario, Canada, offering regular meetings, educational programs, and a dedicated hackspace for electronics and radio experimentation. The club operates several repeaters, including a 2m repeater (VE3RSB) on 147.210 MHz with a +600 kHz offset and 131.8 Hz tone, which supports AllStar node 542490. Additionally, BARC maintains a UHF repeater on 444.825 MHz with a +5 MHz offset and 131.8 Hz tone, and a 1.25m (220 MHz) repeater, facilitating local communication and digital mode access. BARC hosts multiple nets, including a Fusion Net on Mondays at 8:00 p.m. via VE3RSB-Room 61272, a Regular Wednesday Night Net on the VE3RSB system at 7:30 PM, and a 220 Net on Thursdays at 7:00 p.m. The club also runs a CW/SSB HF Net every Thursday at 7:00 p.m. local time on 40m, utilizing 7.125 MHz for LSB and 7.124.3 MHz for CW check-ins. These activities promote on-air participation, technical skill development, and social interaction among members, supporting both VHF/UHF local operations and HF DXing. -
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This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure. This antenna uses flat 450 ohm Window Line for the tuning stub. -
The antenna ground or earth system can be key to its operation whilst also being a key safety feature. This article is about grounding systems for antennas, covering different aspects of grounds made for antenna safety, or expressly for lightning or just to improve antenna performance, being ground an antenna component. -
CISAR - Centro Italiano Sperimentazione Attività Radiantistiche - Sezione di Torino IQ1GU -
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This article demonstrate how to build and mount a 40 meter loaded dipole using basic materials. This antenna reduce the overall length of an HF dipole through the use of loading coils. -
Tubes and electronic components online shop. Dealer for svetlana, sovtek, tesla, mullard and tungsol tubes -
World Flora and Fauna Awards from Czeck republic -
eHam reviews of the RM VLA 200 VHF RF power amplifier -
Accurate county coverage limited to Tehama, Butte and Shasta at the moment -
Surrey radio contact club (srcc) - an amateur radio club based in Croydon, Surrey, UK -
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The Gwinnett Amateur Radio Society (GARS) is an ARRL special service club serving Gwinnett and the surrounding counties in Northeast Metro Atlanta. We are a diverse club with interests spanning all interests in amateur radio. -
Victoria Haliburton Amateur Radio Association -
Personal page with homebrewing articles by Y05OYR -
A HF power amplifier with a push-pull of AFT09MS015N. The (small-signal) gain of the amplifier is around 26 dB in the lower HF band and goes down to about 24 dB on the higher end and still around 21 dB at 50 MHz. Its input matching is relatively good at the lower HF and degrades above 10 MHz. -
A windows program to learn Morse code and doing QSO in CW. The training course contains 39 Lessons based on Koch method. It can sends only letters, only numbers, only punctuation -
A four position HF antenna switch with PC control -
Using DX4WIN with ICOM radios and the ICOM PW-1 RF power amplifier -
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A Radio Society of Great Britain affiliated club. GS3BSQ GM3BSQ -
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This is a simple half wave antenna for 70 cm band, made using the jpole design. -
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North Central Arkansas Amateur Radio Service -
Fast growing Amateur Radio Club with many varied interests, Two time Canadian Field Day champions. We welcome new Amateurs and especially those wanting to become Amateurs, we have one of the best instructors in the lower mainland and 3 volunteer examiners -
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Amateur radio repeaters, often designated by an "R" number like _R6_ or _R5_, serve as crucial infrastructure for extending VHF/UHF communications range. This resource from Essex Ham explains the fundamental concept of a repeater, detailing how it receives on one frequency and simultaneously retransmits on another, typically with a 600 kHz offset for 2-meter repeaters. Understanding the input and output frequencies, along with the required CTCSS tone, is essential for successful access, ensuring your signal is processed and relayed across a wider service area. The article clarifies the importance of using the correct _CTCSS_ (Continuous Tone-Coded Squelch System) tone, often referred to as a sub-audible tone, to activate a specific repeater. It also touches upon the concept of _simplex_ operation versus repeater use, highlighting the benefits of repeaters for mobile and handheld transceivers. Proper operating procedures, such as listening before transmitting and keeping transmissions concise, are emphasized to maintain good amateur practice on shared repeater assets. -
This PDF document provides a detailed guide on designing an 80m loop antenna. The content covers the construction, setup, and tuning of the loop antenna, offering practical tips and considerations for optimal performance. Whether you are a beginner looking to enhance your radio communication capabilities or an experienced operator seeking to improve your antenna system, this resource serves as a valuable reference for building an effective 80m loop antenna. -
The Crossroads of America Amateur Radio Ladies Association is an association of female amateur radio operators from Terre Haute, IN, and the surrounding area. -
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Analysis of flag receiving antennas using MININEC with focus on relation of size and atenna height by VE6WZ -
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A tutorial on how to get started operating RTTY using MMTTY as the primary program to begin your RTTY operations. Installing, configuring and using MMTTY. Documentation in English and Spanish -
The Narrow Band Emergency Messaging System (NBEMS - pronounced N-beams) is a suite of software programs based around Fldigi and designed for point-to-point, fast, error-free, emergency messaging which takes up very little space on the ham bands. -
Nikolaev regional branch of UARL -
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Determining the characteristic impedance (Z) of an unknown coaxial cable, a common challenge for many radio amateurs, can be resolved with a straightforward method. The impedance of a coaxial cable is derived from its inductance and capacitance, and importantly, these values are independent of the cable's length or the operating frequency. This means that measuring a random length of cable, such as 20 meters, provides sufficient data for calculation. The core of this technique involves an LC-meter to obtain the inductance (L) in microHenries (uH) and capacitance (C) in microFarads (uF). The impedance is then calculated using the formula Z = L/C. For instance, a measurement yielding L=1.2uH and C=450pF (0.00045 uF) results in an impedance of 51.6 Ohms, closely matching **RG-58** specifications. Similarly, a TV coaxial cable with L=1.8uH and C=320pF (0.00032 uF) calculates to 75 Ohms. While the accuracy of this method, depending on the LC-meter's tolerance, is approximately 10%, it proves sufficiently precise for practical determination of unknown coaxial cable impedance, as noted by Makis, SV1BSX, who credits Cliff, K7RR, for the formula's dissemination. -
February 10-20, 2012 Winter DXpedition to Miquelon Island -
This type of antenna is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It’s a dipole fed off center with a 4:1 balun at the offset feed point. The antenna shown covers 80, 40, 20 and 10 meters. The formula can also be used to adjust the overall length to cover more or fewer bands and the resulting overall length. 160-10m, 80-10m or 40-10 meters depending on your available space. Other bands will require a tuner. -
Icom IC-R75 product page at SWling.com with technical details and links -
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The Internet has changed our lives. Nowadays it is possible to remotely control your Ham Radio station via the Internet. -
The Gisborne Amateur Radio Club is an Incorporated Society, Number 258284, is registered as a charitable group and is also Branch 11 of the New Zealand Association of Radio Transmitters Incorporated
