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Official summits on the Air discussion group

Repairing and restoring a Tektronix 465 oscilloscope

The Horn reflector antenna at Bell Telephone Laboratories

Explains the annual Jamboree on the Air (JOTA) event, a global amateur radio gathering for Scouts and Guides. This activity connects young people worldwide through ham radio, fostering international friendship and introducing them to radio communication technology. Participants use various amateur radio bands and modes, including HF, VHF, and digital modes like FT8 and JS8Call, to make contacts with other JOTA stations and learn about the hobby. The ARRL provides resources for Scout leaders and amateur radio operators interested in hosting a JOTA station, including guidelines for setting up temporary stations, safety protocols, and educational materials. The event typically occurs on the third full weekend of October, aligning with the World Organization of the Scout Movement's (WOSM) global schedule. JOTA emphasizes hands-on experience with radio equipment, antenna theory, and basic operating procedures. It serves as a significant public service opportunity for hams to engage with youth and promote the educational aspects of amateur radio.

Maintenance of Antenna Tower Systems, Antenna tower foundation analysis and repair, Tower troubleshooting and repairing

@ hamstation.eu - email forwarding service for ham radio operators

A **dipole antenna's** performance characteristics, specifically its gain and main angle of transmission, are significantly influenced by its height above ground. This resource presents a graphical interpretation of a study conducted by Mike Banz, AA3RL, which explored these critical relationships. The original study's tabular data has been converted into easily digestible graphs, allowing for a clearer understanding of how varying antenna heights affect the **radiation pattern** and overall efficiency. The analysis focuses on the practical implications for amateur radio operators, demonstrating how antenna placement can optimize signal propagation for different communication objectives. Understanding these principles is fundamental for effective station setup, whether aiming for local contacts or long-haul DX. The visual format aids in quickly grasping the complex interplay between physical setup and electromagnetic wave behavior.

Supporting wire antennas with squid poles

Midwest Mountain Thunder CB Radio Group is a group of CB SSB operators that started in the Midwest as a branch off of the Washington State group. good clean radio

Kenwood / Trio transceivers varaible power adjustment by G4VPM

Free ads for UK Hams

An article on CDE/Hy-Gain/MFJ antenna rotator repairing

This antenna is designed for stations having a difficult time putting a decent signal on 160M from small or CC&R d lots. It is a 24.5 ft. vertical antenna, made from three 10 ft. PVC sections bolted together, and half wavelength of antenna wire helically wound around the PVC sections.

The TS-690 was Kenwood All Mode Multi Band HF Transciever

The Union Métropolitaine des Sans-filistes de Montréal (UMS) operates daily nets on **VE2REM** 147.015+ T103.5, **VE2RYV** 146.655- T141.3, and **VE2RVK** 145.430- T141.3, alongside Echolink VE2UMS-L and DMR TG302273. This Montreal-based club, representing hundreds of radio amateurs, provides information for those interested in amateur radio and serves as a communication hub for its members, including a regularly visited ham radio flea market section. The site also highlights significant club initiatives like the AREDN Mesh Network modernization project and an innovative after-school program. The UMS website details upcoming events such as the 2026 sugar shack invitation, Field Day 2025, and monthly meetings scheduled for September 18, 2024. It also features a live log sheet section and a WEB SDR, offering practical tools for members and visitors. The club's president, Bruno VE2VK, extends a welcome, emphasizing the UMS's role in fostering amateur radio in the greater Montreal region, with contact information provided for inquiries.

The OnAir SDR receiver application, hosted on GitHub, supports a broad range of digital and analog modes across macOS, Windows, and Linux platforms. It decodes various digital TV standards like DVB-T/T2, DVB-C, DVB-S/S2, ATSC, ISDB-T, and DTMB, alongside broadcast audio formats such as DAB+, FM, and DRM. For aviation enthusiasts, it processes ADS-B, ACARS, and VDL2 signals, while also offering satellite reception and GNSS capabilities. Amateur radio operators benefit from its support for modes including FT8, PSK31, and CW, in addition to general digital voice decoding and cell tower monitoring. A built-in spectrum analyzer provides visual analysis of received signals. The project demonstrates active development, evidenced by over **1,750 commits** to its codebase. OnAir is designed for compatibility with popular SDR hardware, including _HackRF_, RTL-SDR, Airspy, SDRplay, BladeRF, LimeSDR, Pluto, and USRP devices. This wide hardware support makes it a versatile tool for radio enthusiasts and professionals working with various SDR platforms.

Software for Aircraft Scatter Prediction. Extend your capabilities on VHF-/UHF-SHF bands even when you live in an unprivileged location and Calculate a propagation path between two stations and follow the aircrafts in real time

Reviews of the Yaesu FL-2100 series power amplifier at eham

Pilot of The Airwaves

The largest supplier of solder mask in the world

Listing of North American Class 1, industrial,short line, tourist and transit lines. Includes a listing of all the frequencies sorted numerically.

Eham users product review about the Yaesu VX-170 waterproof vhf ht transceiver

W6OPO report on Icom IC-7700 stress test to verify PA integrity under high duty-cycle usage

VHF beacon Located in JN58ic

The Islands Of Croatia Award

Custom made straight key with your call. Proudly made in the USA. Made of beautiful wood and polished brass.

eHam reviews for the Kenwood TM 241 VHF mobile transceiver

Presents the construction of a shortened _Morgain_ dual-band wire antenna for 40 and 80 meters, specifically designed for installations with limited physical space. The design achieves a compact footprint of approximately 10 x 0.5 meters, utilizing 64 meters of 1.5 mm² insulated electrical wire. The article details an alternative configuration that reduces the antenna's physical length while maintaining its electrical characteristics for dual-band operation. Author _Remo - IM0JZJ_ conducted tests from Sant'Antioco, Sardinia, reporting SWR measurements of 1.2:1 to 1.4:1 on 40 meters. On 80 meters, SWR ranged from 1.1:1 to 1.5:1 across 3620 kHz to 3720 kHz, with a 1:1 current balun recommended for coaxial feed due to the antenna's approximately 50-ohm feed-point impedance. The installation used two 11.50-meter galvanized steel poles, supporting the antenna at about 10 meters above ground. Construction involves three wooden boards and sixteen fiberglass laminate spacers, with specific instructions for routing the 32-meter wire arms. The design eliminates jumpers for 40-meter tuning but requires two jumpers approximately 1.45 meters from the ends for 80-meter operation, which are tuned and then permanently soldered.

Large personal QSL collection by I3CRW

eHam reviews about Cushcraft X7 yagi antenna

Established in 1914 and affiliated with the ARRL since 1930, the Portland Amateur Wireless Association has the distinction of being the oldest Amateur Radio club in Maine

Users review for the Kenwood TS-450S

There are some aspects in regards to mailing QSL letters to Russia which you should know

About Amplitude-Modulation

Reviews Summary for Cushcraft A3S at eham.net

From 1921 to 1924, radio amateurs experimented with transmitting across the Atlantic. Everyday Engineering magazine organized the first sending test with English amateurs prepared to listen for signals from the US

New Club Site For Maidstone YMCA ARS

Learn Morse Online in 40 lessons with this web based morse code learning program, based on the Koch method. Choose the lesson, adjust the wanted parameters, and start the transmission of a set of random characters based on chosen lesson. Recognize the code and verify it at the end of the lesson.

K6BJ-2m Repeater Maintenance and Repair Log

eHam reviews of the Yaesu FTDX-3000 HF Class line transsceiver bu Yaesu

The Ak-Sar-Ben Amateur Radio Club, Inc. of Omaha, Nebraska is a local club comprised of licensed amateur radio operators, also known as “hams”.

Provide RF connectors, adaptors, antennas, accessories, mounts, coax, West Mountain Radio Products and Anderson Power Products available.

A review of the HF ham radio bands, considere by far the most popular bands in the amateur service. HF bands offer local QSOs and world-wide propagation are all possible at almost anytime with careful selection of the right frequency for the time of day, time of year, and current state of the sunspot cycle.

The contest takes place the first full weekend of May (from 1800Z on Saturday May 5 to 0400Z Sunday May 6, and from 1100Z to 2100Z Sunday May 6). A total of 20 hours contesting!

The Yavapai Amateur Radio Club was established on July 18, 1991. That was the day the bylaws were accepted by a handful of area hams.

RSGB article for beginners. How to build a dipole antenna, construction tips and correct setup of inverted-ve dipole antennas

Reviews of the Kenwood TL-922A Power amplifier

Rainbowkits.com is a manufacturer of electronic kits for the hobbyist as well as for education.

A group of hams from the Rio Araguaia region

Since November of 1998, The Freewheelers Net has been on the air on 3.916 MHz