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Thames valley repeater group homepage. information about the group, its activities and its four amatuer radio repeaters in the thames valley area

Sporadic E is a form of propagation that can arise with little warning, and enable radio frequencies of 150 MHz and more to travel over distances of a thousand kilometres and more.

Home brewing a high performance, high power common mode choke for HF bands

Steve Nichols, G0KYA, presents a practical examination of ground systems for vertical antennas, drawing heavily on the empirical research of Rudy Severns, N6LF. He explains that a robust radial field is crucial for ground-dependent verticals, effectively replacing the antenna's "missing half" and mitigating severe RF absorption in lossy soil. Nichols clarifies that surface radials do not strictly require a quarter-wavelength; instead, deploying a minimum of 16 to 32 shorter wires often yields superior results compared to fewer, longer ones. The presentation also addresses the common SWR paradox: a poor ground might show a perfect 1:1 match, but adding radials, while potentially raising the SWR to around 1.4:1, significantly improves true radiation efficiency. Nichols defines counterpoises as elevated wire networks that substitute for earth connections, offering solutions for limited-space installations, such as the **Folded Counterpoise (FCP)** for 160 meters. This resource provides actionable engineering data for optimizing vertical antenna performance.

The Northampton Scout Amateur Radio Group provides Radio Scouting and associated technology based activities for Scouts in the Northampton area.

The Club aims to meet the needs of all interested in amateur radio, and has a varied programme of guest speakers, surplus sales, members' interests evenings, and social evenings.

The MiniTioune receiver project, developed by Jean-Pierre F6DZP, consists of the home constructed MiniTiouner hardware which interfaces via a standard USB 2.0 port to a Windows PC running the MiniTioune software. It can be used to receive satellite broadcasts transmissions making it ideal for use on Q-oscar 100 Es hail-2 without any external frequency converters.

Amateur radio blog by Adrian Leggett M0NWK

Local amateur radio club to the south of nottingham city

Based in Filwood, Bristol England

Amateur Radio Section, Isle of Wight England UK

Gloucester amateur radio and electronics society

The Newbury and District Amateur Radio Society (NADARS), operating under the callsign G5XV, details its extensive history spanning **104 years** and its operational activities. The resource outlines regular monthly meetings held at Acland Hall, Hermitage Rd, Cold Ash, RG18 9JH, typically featuring informal lectures on radio-related topics. It also highlights the club's engagement in various social and radio events, including participation in contests such as _IOTA_ and _NFD_. NADARS maintains regular daily nets on both 2M and HF bands, providing specific details for members to join. A significant annual event is the Newbury Radio Rally, hosted each summer at the Newbury Showground, which attracts visitors nationwide and features radio and computing sales, club stands, and live demonstration stations. Information on upcoming events, including the next Newbury Radio Rally scheduled for July 5th, 2026, is also provided.

Tektronix Signal Generator web site. A Tektronix signal generator can create a virtually unlimited number of signals - analog or digital, ideal or distorted and more.

TSGARC Amateur Radio club Thornbury & South Gloucestershire Englang UK

List of amateur radio repeaters in Essex England

Shirehampton is located near the mouth of the Avon about 1 mile from the port of Avonmouth and 5 miles from the city of Bristol

Crawley, West Sussex UK.

The amateur radio listener for when you're not on the radio. Repeater-START, the offline repeater listing app for Windows, Linux, Raspberry Pi, Ubuntu, Librem Phone is available, Now with grid square display, topographical maps and frequency preferences

Scottish repeater Group

Is for those who wish to explore the globe by radio and experiment with electronics.

Amateur radio uhf repeater covering the bristol area - callsign gb3bs

RSGB Affiliated club

Founded in 1958, as the Wolverton & District Radio Club, largely by members of the Diplomatic Wireless Service at Hanslope Park, MKARS now has over 120 members

Bring the six meters with you during your hoilidays. This article features a portable moxon antenna for 50 MHz used for sota portable operatios

The author reflects on expanding their antenna for 80m coverage during lockdown. They extend the End Fed Half Wave (EFHW) using a Spiderbeam pole and "cheating" by dog-legging across their garden. Despite challenges, they achieve coverage for multiple bands with minimal cost. Practical Wireless features EFHW antennas, including a pre-made 20m EFHW extended for 40m.

The ICOM IC-7610 SDR HF/50MHz Transceiver official product page with product specifications, option accessories and video at ICOM UK

G3ztt mid cheshire amateur radio society, cheshire uk

In this article, Steve G0UIH presents a straightforward guide for constructing a lightweight 15m 3 Element Yagi antenna with impressive performance metrics. With a focus on ease of construction and efficiency, the design boasts a nearly 8.2dbi forward gain and 30db front to back ratio. Utilizing readily available materials and a hairpin match for impedance matching, this Yagi offers broad bandwidth and simple tuning for optimal operation across the 15m band.

ESR is located in the North East of England and was formed in the early 1980s offering customers a broad range of Audio-Visual, Electrical and Electronic Components and Accessories.

ARAC Andover radio amateur club

Echelford amateur radio society is based in ashford, middlesex, uk. has about 80 members.

Here is a formula and calculator for creating a loaded (shortened) quarter wave vertical or balanced dipole. The calculation refers to either a loaded 1/4 wave or a loaded dipole

Established 1938

Specification of the ICOM IC R7100, VHF UHF Receiver

2013 Apr 13 - 2013 Apr 20 Palm The Grenadines

S.C.A.R.T is a club based in the Southampton area of the UK open to everybody who is interested in amateur television and video related subjects.

Tuning into the airwaves for new and interesting transmissions has fascinated enthusiasts since the very earliest days of radio. As a result of advances in computer and radio technology, the equipment packed radio rooms of the past are now replaced by scanning receivers sometimes just the size of a mobile phone. What can radio receivers/scanners pick up? What types of radio receivers/scanners are there? What can and cannot be monitored legally? Best practice when using a radio receiver/scanner

The South Manchester Radio and Computing Club (SMRCC) provides a vibrant community for radio amateurs and computing enthusiasts in Sale, Cheshire, UK. Established as an active local club, it hosts regular weekly talks covering diverse subjects within both amateur radio and general computing. Members engage in various activities, fostering knowledge exchange and practical skills development across different facets of the hobby. The club's focus extends to supporting members in their pursuit of radio operating, technical projects, and digital communication methods. With a consistent schedule of meetings, SMRCC aims to be a central hub for local hams and those interested in the intersection of radio and computer technology. The club's activities contribute to the local amateur radio scene, offering opportunities for learning and social interaction.

Details the operational scope and maintenance requirements for the Gloucestershire Repeater Group's amateur radio repeater network. It outlines the financial obligations associated with site rent, electricity, insurance, and professional aerial maintenance, emphasizing the necessity of member support or donations for sustained operation. The resource provides information on accessing individual repeater systems via the site menu. It also announces the 2026 Annual General Meeting (AGM) details, including the date, time, and location at The Robins Nest, Cheltenham Town Football Club, noting the venue is shared with the Cheltenham Amateur Radio Association. The page highlights the availability of the repeaters to all licensed radio amateurs and details how to contribute to their upkeep through membership or direct donations.

The kent repeater group provides amateur radio repeaters on 6 sites in the county

New and information for the UK Radio Scout

The Worthing and District Amateur Radio Club

The following is the third part of a three-part guide to help get started with HF, written by Charlie Davy – M0PZT

Saltash & District Amateur Radio Club

GB3SO GB3FR Official Fenland Repeater Group website

Opting for a visually appealing inverted L configuration, G4WIF anchors the End Fed Half Wave antenna to an old clothes line pole, seeking cost-effectiveness in their endeavor. Despite initial misconceptions about transformer components, a £7.95 investment in a T240-43 toroid and DIY mounting container resolves the issue. Reflecting on commercial alternatives, G4WIF's homemade solution proves both economical and sufficient for their amateur radio needs.

The Sheffield Amateur radio Club was founded in the 1920 and has a very long history of Amateur radio in Sheffield.

A web site dedicate to pedestrian and bicycle amateur radio mobile operations.

Amateur radio portable operation has a lot to offer, even if you are a shack sloth and have an awesome setup.