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Amateur Radio in the Blackstone Valley area

Modifications for the Kenwood TS-870S

Using a PC with soundcard as a VLF receiver, how to use your PC as a receiver for narrow-band signals in the VLF radio spectrum by DL4YHF

Rail Radio Communication Feeds broadcasted from all over the United States and beyond.

MARC is dedicated to providing safe and reliable two-way radio communications for selected charity events in their respective regions

Loop Antenna Basics and Regulatory Compliance for Short-Range Radio

Over 45 years of dedicated work by Robert Sherwood, NC0B, culminated in a wealth of technical insights, particularly concerning **receiver performance** and the intricacies of transceiver design. The site provides access to numerous presentations from events like Dayton Contest University and W4DXCC, covering topics such as optimizing rig performance, the evolution of lab testing, and the impact of roofing filters on transmitted IMD and receiver characteristics. These resources offer detailed analyses and practical advice for serious operators and contesters. While product manufacturing, including the SE-3 MK IV synchronous detector and various Drake R-4C accessories like roofing filters and cooling kits, has ceased, the legacy of technical documentation remains. The site details specific products like the Icom IC-781 and R-9000, and offers insights into 455 kHz mechanical and crystal filters, along with DSP protection strategies. Crucially, the site features extensive receiver test data, allowing radio amateurs to compare the performance of various transceivers. This data, often presented in white papers and slide shows, includes detailed measurements and explanations of key performance metrics, serving as a valuable reference for understanding and selecting high-performance HF gear.

The Voice of Idaho Amateur Radio Club Website. News and information from Treasure Valley and surrounding area

Articles about Amateur Radio, own writings and translations: history, DXpeditions, contesting and DXing ethics, Codes of Conduct, Suggestions for Pile-ups, Suggestions for Contesters, the most wanted DXCC entities.

A web site dedicated to collecting and restoring antique crosley tube raidos. pictures and descriptions of antique crosley tube radios from the twentiew, thirties, forties, and fifties. radio advertising from the twenties, thirties, forties, and fifties. tube box art. links to many antique radio related sites.

Wiki Site dedicated to radio scanning info in New Zealand

Ham Radio Class Exam question pool effective 7/01/2010 thru 6/30/2014

For radio amateurs seeking to identify or verify callsigns from Bosnia and Herzegovina, an online callbook service offers a direct search utility. This resource focuses exclusively on the _T9_ prefix, allowing users to input a specific callsign and query a dedicated database. It serves as a historical reference for contacts made prior to its last update. The utility provides a straightforward interface for callsign lookups, presenting results based on data compiled up to _July 31, 2000_. While the information is static and not current, it remains useful for confirming older contacts or for historical research within the amateur radio community. The service is maintained by _Boris Knezovic, T93Y_, offering a focused resource for this specific geographic region.

Small, but growing, group of amateur radio enthusiasts, most of whom are within 90 miles (and more) of Atlanta

Digital radio mondiale DRM products, measuring tools, Magnetic field probes, RF power meters, Broadband loop antennas, DRM devices and services

UN Radio - (United Nations) - IRN Internet Radio NEXUS.

XLT Communications two way radio accessory manufacturer, microphones, headsets, belt clips, earpieces, radio cases

Chinese Taipei Amateur Radio League

VE1FQ, has a long history dating back to 1932 and may be the oldest Amateur Radio club in Canada.

Radio Singapore International

Beginners guide and introduction to get started in ham radio if you live in India

A QRP association of amateur radio operators based in Sardinia Island Italy

Download uiview maps by G3OJZ mostly for APRS UK region

Fort Walton Beach FL

A mail list for those interested in the new Amateur Radio MFSK modes.

This resource examines the appropriate use of /M (mobile) and /P (portable) suffixes in amateur radio callsigns, specifically within the context of the UK Amateur Radio Licence. It addresses common ambiguities and challenges in determining operational status, such as operating from a summit or while walking. The discussion references the licence version in force before February 21, 2024, noting that while current regulations recommend but do not specify suffix use, the prior definitions remain relevant for understanding common practice. The content dissects key sections of the licence, including "Notes to the licence" (d)(i-iii) which outlines /A, /P, and /M usage based on location, and "Temporary Location" (jj) which defines /P operations. It also clarifies "Mobile" (17(1)(x)) as operating in or on a vehicle, on a pedestrian, or on a vessel on inland waters. The author provides examples and recommendations for choosing between /M and /P when both might apply, such as when operating from a parked car with a deployed mast or using a handheld on a summit. Historical notes from M1MAJ, G8ADD, and G6MZX are included, tracing the evolution of suffix rules from pre-BR68 days to the 1977 licence version. These historical perspectives highlight how past regulations have influenced current interpretations and persistent myths regarding /M usage. The resource emphasizes making an informed choice based on the licence and communicating the station's operational circumstances clearly.

MyHamPlace is a online amateur radio shop based in China dealer for Heilsound, Elecraft, MFJ, Yaesu , Kenwood and other popula ham radio brands

Kentucky farmer invents wireless telephone! But was it radio? Facts and folklore about Nathan Stubblefield by Bob Lochte.

The Amateur radio Association of Bloomington (ARAB) holds its meeting on the first Tuesday of each month

Codec2 is an open source low bit rate speech codec designed for communications quality speech at 2400 bit/s and below. Applications include low bandwidth HF/VHF digital radio and VOIP trunking.

The FieldComm Association, based in Central Virginia, operates as a specialized amateur radio club with a primary interest in emergency communications. Members engage in various technical aspects of radio, including digital modes, QRP operations, and DXing. The association provides a platform for hams to develop skills in field deployment and reliable communication under challenging conditions, often leveraging modern digital protocols. This organization's activities support the practical application of amateur radio for public service, emphasizing readiness and operational proficiency. Members collaborate on projects and share knowledge, fostering expertise in areas like portable station setup and efficient data transmission. The focus on emergency communications distinguishes its operational priorities from general interest clubs, aligning its efforts with community preparedness.

HSMM Experiments on the 6M Amateur radio Band

The HyGain LJ-153BA a monoband 3 element Yagi, designed for the 15 m band 21.00 - 21.45 MHz

Egyptian Radio Amateurs Assembly

A free small database program for Palm OS that allows you to log ham radio contacts. You can log the call sign, name, date, time and frequency of the contact.

A nice post on Make: on homebrewing a multiband antenna for amateur radio portable operations

Graph of the frequency response of some of the legendary microphones favoured by radio hams

Australia's largest range of Electronic Kits & Components In Stock for the Radio Experimenter, ATV, microwaves, HF Band pass filters

The ÖVSV website provides extensive resources for Austrian radio amateurs, including details on its nine **Landesverbände** (regional sections) and the Austrian Military Radio Society (AMRS). It features information on licensing, legal frameworks, and **band plans** for both HF and VHF/UHF operations. The site also covers various amateur radio activities such as contests (HF, VHF/Microwave, Alpe-Adria, SOTA, ARDF), technical projects like WRAN, and educational content explaining what amateur radio is and how to become a licensed operator. Recent news items highlight events like the "Laa Funk '26" exhibition, the "OE5XLM" club station's participation in the CQ WW Contest, and the "International Marconi Day 2026" activation by "OE26M" from Küniglberg. The site lists upcoming events, including a 160m OE-Aktivitätsrunde, a seminar on Baluns/Ununs, and various club meetings and flea markets. Membership is facilitated through regional sections, and the site emphasizes amateur radio's role in independent communication during crises.

An RF Field Strenght meter project by the Shefford & District Amateur Radio Society

Kennewick, Pasco Richland

Here's a tale of early '70s vacuum tubes, mainly from the viewpoint of amateur radio.

October 2000 Ham radio dx-pedition

Kingston Amateur Radio Club Articles Dave Lawrence, VA3ORP

McMinn County Amateur Radio Club, Inc. (MCARC) Club Callsign KF4CFO.

A fully equipped amateur radio mobile radio shack by VE6AB

The Northern Alberta Radio Club serves Edmonton, Alberta and area.

Supplying over 2000 different vacuum tube types, valves, grid caps, sockets and capacitors. It is easy for Antique collectors, Ham radio operators, audio enthusiasts, broadcast enthusiasts and amateur radio hobbyists to buy, sell and trade vacuum tubes, electron tubes, audio tubes, valves, grid caps, sockets and capacitors

This resource presents a domain name for sale, specifically _Kl7aa.com_, for $995, with an option for a 24-month payment plan at $41.46 per month. The page details the purchasing process, including immediate domain access, zero percent financing, and secure shopping. It also outlines the transfer process to other registrars like _GoDaddy_, clarifies what is included with the domain purchase (only the domain name, not hosting or web design), and explains how to maintain WhoIs privacy protection. The content includes testimonials from buyers like Dann Berg and Greg Shepard, highlighting smooth transactions and quick domain delivery. It also provides information on HugeDomains' 30-day money-back guarantee and frequently asked questions regarding domain transfers, access post-purchase, and payment plans. The page emphasizes the importance of a web address and lists other similar domains for sale, such as _Kl35.com_, alongside quick stats about the domain's length and structure.