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This study details a reception comparison between vertical and horizontal active loop antennas, specifically two identical _Wellgood active loop antennas_, on various HF bands. The experiment, conducted in a densely populated QRM-prone area, monitored FT8 signals over a 24-hour period using two identical receivers. The methodology involved direct comparison of signal reception across the HF spectrum, aiming to identify performance differences based on antenna orientation. The results indicate that vertical loops demonstrated superior performance on higher bands (10m, 15m, 20m), while horizontal loops excelled on lower bands (30m, 40m, 160m), particularly for receiving long-distance (DX) signals. The horizontal loop's advantage on lower bands is attributed to potentially better low-angle performance and reduced sensitivity to man-made noise, yielding a **2-3 S-unit** improvement on 160m. The study provides practical insights for optimizing antenna placement in challenging urban environments, noting that the horizontal loop consistently showed a **10-15 dB** signal-to-noise ratio improvement on lower bands.

Exploring LoRaWAN Range, comparing the performance of 1Watt and 100mW LoRa trackers on daily commute. Analyzing APRS tracks, beacon statistics, and visual comparisons to uncover insights and surprises in the world of long-range wireless communication.

Developed by an expert in memory and cognition, the Skilman Introduction to Morse Code and Morse Code Speed Builder are a complete and comprehensive course of study.

In this study, the author builds upon Muncy's research, demonstrating that radio-frequency current on cable shields affects audio systems through the "pin 1 problem" and shield-current-induced noise (SCIN). An enhanced equivalent circuit for ferrite chokes is proposed, addressing dimensional resonance and inductor self-resonance. Field tests confirm that chokes reduce interference across 500 kHz to 1,000 MHz. Guidelines for diagnosing and mitigating EMI from various sources are provided for product development and field installations.

Using Gordon West study manuals in your amateur radio classes offers your students the very best in study materials available today

A modern, free online study tool for US amateur radio exams. It provides current NCVEC question pools for all license classes (Technician, General, and Extra). Features include a smart practice mode that tracks your weak areas and provides detailed explanations to help you pass faster.

Monitoring public safety communications, particularly fire department dispatch, presents a unique challenge as agencies increasingly move towards encrypted systems. This Broadcastify feed, originating from a _BCD396XT_ scanner situated in northern San Diego City, provides real-time audio for the San Diego City Fire Department. While it previously included police dispatch, those transmissions are now fully encrypted, a common trend impacting scanner enthusiasts and emergency services observers alike. The setup utilizes a Windows server running _Freescan_ and _RemoteFS_ for remote control, ensuring consistent operation and clear audio via a ground loop isolator. With a peak of 8,785 listeners in the last 24 hours, the feed demonstrates significant interest in local emergency traffic. Alpha tags, indicating the current channel, are generally available for premium users, enhancing situational awareness for listeners. Feed archives are maintained in 30-minute segments, allowing for review of past incidents and operational patterns, a valuable feature for those studying emergency response or simply keeping informed about local events.

AA9PW offers free practice exams for all three US license classes plus international licenses like Canadian and Australian. The site generates random tests from the current question pools, simulating the actual exam experience. You can choose between online exams or printable PDF versions for offline study. The site maintains a simple, no-frills interface that loads quickly even on slow connections. Practice tests provide immediate feedback with score reports highlighting areas needing improvement.

Ham Exam provides adaptive practice tests that adjust difficulty based on your performance. The site offers all current question pools and calculates your probability of passing the actual exam based on your practice results. It includes detailed explanations for each answer and tracks your progress across specific subelements of the exam. The clean, distraction-free interface makes it easy to focus on studying, and no registration is required to use the basic features.

This study analyzes the antenna pattern of the Utah Amateur Radio Club's 146.760 MHz repeater following antenna relocation in 1997. Noting degraded transmission toward the north, a customized signal mapping system using a Yaesu FT-817, GPS, and software was developed to log real-time signal data. Calibration techniques extended the radio's signal range, enabling precise field measurements. The method allowed continuous signal strength monitoring while driving, revealing anomalies in coverage likely due to tower modifications. Findings helped assess and visualize the antenna’s actual radiation pattern and highlighted environmental impact on signal distribution.

Gordon West Radio School provides comprehensive study materials including books, audio courses, and practice exams. "Gordo" is renowned for his ability to explain complex concepts in memorable ways, often using humor and mnemonics. His materials include insider tips from his decades of teaching experience and administering exams. The audio courses are especially popular among commuters who can study while driving. The site offers package deals combining different media formats for various learning styles.

Fast Track offers simplified study materials designed to get you licensed quickly. Their approach focuses on understanding concepts rather than memorization. The site provides condensed study guides, mnemonic devices, and tips for remembering formulas and technical information. Their practice exams include explanations that connect to real-world applications, helping you understand why answers are correct. The resources are particularly helpful for visual learners, with diagrams illustrating complex concepts.

Facilitates preparation for FCC amateur radio licensing exams by providing free, unofficial practice tests for all three license classes: Technician, General, and Extra. Each question includes its source and a detailed explanation for the correct answer, promoting deeper understanding beyond simple memorization. Users can engage in an _exam mode_ with timed, scored simulations or print question sets for offline study, reinforcing knowledge of operating procedures, FCC regulations, and radio theory. The platform covers all topics from the official question pools, such as operating rules, remote pilot certificates, airspace classes, and weather effects on performance. It also includes specialized sections like _METARs, TAFs, and weather sources_, crucial for understanding atmospheric conditions impacting radio wave propagation. While primarily focused on amateur radio, the site also hosts practice tests for other certifications, including Part 107 Remote Pilot, various Element tests for commercial radio licenses, and numerous state-specific driving and professional exams.

PD0G recounts the journey of building a 70cm Swiss Quad antenna, inspired by a vintage 2-meter version acquired for study. The author meticulously examines the original design, noting its distinctive curved metal elements and mechanical structure, which deviates significantly from traditional cubical quads requiring spreaders and wire. Historical context is provided, tracing the Swiss Quad's origins to R.A. Baumgartner (HB9CV) and its appearance in publications like the RSGB Bulletin in 1964 and QST in 1967, while also distinguishing it from other HB9CV designs. The project details the scaling process for 70cm, utilizing a calculation chart from F6ITV for initial dimensions and an existing MMANA-GAL model for 6 meters, scaled down to 433 MHz. Emphasis is placed on the critical gamma-match adjustment, with custom-machined POM parts for precise positioning and electrical isolation. Initial construction with 5mm aluminum elements and a 15mm boom led to practical challenges in bending and achieving target dimensions, necessitating adjustable element sections to fine-tune resonance. Measurements with a CAA-500 and SV4401A VNA confirmed a good match at 432.500 MHz with an SWR of 1.022 and LogMag of -39.46 dB. The author highlights that while a good SWR is achieved, further field testing is required to assess actual gain, directivity, and front-to-back ratio, especially when comparing single versus double element configurations. The article concludes by advocating for revisiting older, less common antenna designs, emphasizing the learning and satisfaction derived from hands-on experimentation.