lan radio

lan radio

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• Extended Double Zepp NVIS Antenna Calculator - Extended Double Zepp measurements for all ham bands, and online calculator. The antenna is constructed much like an ordinary Dipole antenna but with 5/8 Wavelength Elements matched with an added Impedance Matching Section of balanced feed line
  [ Hits: 124 | Votes: 3 | Rating: 7 ]

• RF Choke with Bifilar Windings - This article presents an RF Choke featuring an 11-bifilar turn winding of #14 house wire on a Fair-rite FT240-31 toroid. The choke is enclosed in a 3D-printed case from Thingiverse, though this may pose thermal concerns at higher power levels. With SWR concerns up to 30MHz, the author plans to employ two series chokes at the rig input for improved performance. This choke offers versatility for portable use, with potential mismatch resolution using an antenna tuner. Further testing is anticipated upon the arrival of new cables.
  [ Hits: 86 | Votes: 0 | Rating: 0 ]

• A Compact and Stealthy Field Portable Antenna - In the quest for an ideal field portable antenna, the author recounts experiments involving various wire configurations. While a previous candidate, a 41ft random wire, proved effective but lacked stealth, the search led to a surprising rediscovery of a design previously rejected—the Rybakov Antenna. With a focus on simplicity, rapid deployment, and multiband capability, the author explores the versatility of a 26ft Rybakov, avoiding the halfwave trap. The article delves into the antenna's performance and its potential as a discreet, resonant solution for field operations, addressing the challenges encountered during a POTA activation. Additionally, the Unun/Balun design used in conjunction with the Rybakov Antenna is discussed, providing insights into achieving a balanced system.
  [ Hits: 153 | Votes: 1 | Rating: 1 ]

• H44WA Solomon Islands - H44WA Solomon Islands November 15-29, 2023. A team of Western Washington DX Club amateur radio operators will activate Solomon Islands in November 2023.
  [ Hits: 15 | Votes: 0 | Rating: 0 ]

• Worked All Britain Award - The Worked All Britain Awards Group (W.A.B.) was devised by the late John Morris G3ABG in 1969. This was to promote an interest in Amateur Radio in Britain and to sponsor a series of awards based on the geography of Great Britain and Northern Ireland.
  [ Hits: 54 | Votes: 0 | Rating: 0 ]

• Wigtownshire Amateur Radio Club - Wigtownshire Amateur Radio Club is the only amateur radio club in South-West Scotland. We serve the huge area of Dumfries and Galloway and northwards into Ayrshire
  [ Hits: 13 | Votes: 0 | Rating: 0 ]

• Bridgerland Amateur Radio Club - We are a group of amateur radio operators located in Northern Utah who enjoy exploring many aspects of the hobby from HF to VHF and beyond. We are active in many public service events, Field Day, APRS, packet, Winlink, contesting and more
  [ Hits: 82 | Votes: 3 | Rating: 10 ]

• Scout Activities - Amateur radio - Radio Scouting at the Scout Association England UK. What to expect and What you will learn, Fun facts, Handy hints
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• SR4DON Web Radio Receiver - OpenWebRX online radio receiver from Olsztyn Poland 10-15 meters bands, 50 MHz VHF UHF bands.
  [ Hits: 188 | Votes: 1 | Rating: 10 ]

• Zen and the Art of Radiotelegraphy - Free PDF book to start learning morse code and to improve your proficiency, freely available in four languages english, german french and italian.
  [ Hits: 112 | Votes: 0 | Rating: 0 ]

• Taking a look at the 900 MHz band - Use of the band as Amateur Radio is secondary in this band to federal radiolocation systems, industrial, scientific and medical devices, federal fixed and mobile systems and the M-LMS. Bandplans for hams. Allocation in 902 - 928 MHz
  [ Hits: 50 | Votes: 0 | Rating: 0 ]

• Airplane scattering - Operating on Airplane scattering. Scattering of radio signals by airplanes. An introduction to operating ariplane scattering, using aircraft to redirect RF that would otherwise be lost in space. Antenna Pointing, Doppler Shift/Digital Modes, using digital modes to operate airscatter.
  [ Hits: 162 | Votes: 0 | Rating: 0 ]

• HF Radio Propagation Forecast  ^updated - This page offers radio amateurs (experienced and beginners) a useful overview and tutorials on HF propagation conditions. Here you will find basic and advanced explanations, as well as practical methods, charts, maps, models, real-time measurements, assessments, comparisons, references, and an index.
  [ Hits: 359 | Votes: 19 | Rating: 8.79 ]

• Display Transplant into an Icom IC-756 - This article is about replacing the LCD display in a Icom IC-756 classic. The displays in these radios have not been supported by Icom in several years.
  [ Hits: 237 | Votes: 1 | Rating: 10 ]

• UK Scanner Frequencies - UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.
  [ Hits: 164 | Votes: 1 | Rating: 1 ]

• Dolstra Elektronica - Ham Radio Dealer based in Holland dealers of most relevant ham radio brands. Transceivers, antennas and accessories for amateur radio and marine radio markets.
  [ Hits: 155 | Votes: 1 | Rating: 1 ]

• aLog365 - aLog365 is a ham radio (amateur radio) logbook for Android and for apple iOS. Includes features for SOTA, POTA, WWFF operations, export to all popular log file formats ADIF, EDI, Cabrillo. Upload data to HRDLOg.net Ham465 and includes dx cluster spots. iOS version is compatible with iPhone, iPad, and iPod touch and provides also an up to date DX Pedition plan.
  [ Hits: 103 | Votes: 0 | Rating: 0 ]

• Enhancing Frontend Performance with Optimized Band Pass Filters - This article explores the nuanced design challenges of Band Pass Filters (BPF) in radio receivers, balancing low insertion loss, high stop band rejection, and narrow bandwidth. The focus is on the "Series-Trap, Shunt-C" topology, resonator count impact, and meticulous layout design for superior stop band performance across various frequency bands
  [ Hits: 82 | Votes: 0 | Rating: 0 ]

• Yaesu FT-891 Go-Box for POTA - This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.
  [ Hits: 196 | Votes: 0 | Rating: 0 ]

• LoRA Gateway IdeeTron Lorank8 - Testing IdeeTron Lorank8 for LoRaWAN with ham radio transmissions. Assessing compatibility, interference, and planning permanent setup. Follow the experimentation and integration into the Almelo Community page
  [ Hits: 19 | Votes: 0 | Rating: 0 ]

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