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Antique Radio Tubes Sell antique radio tubes, over a thousand different radio tubes in stock

All about Chilean contest, awards, links and general news and DX from Chile

The future of two way radio is digital.

A page in french dedicated to the double bazooka antenna, with a short history of this antenna model and main characteristics including a comparison versus the dipole antenna and formulas to determine elements size.

Designed to keep track of your club's roster

The NiCd Lady Company has been in the business of assembly and distribution of batteries since 1994, supplying government, industry and retail with a wide variety of batteries, and production of assembled products.

Club, Club station and Contest site for Radio Amateurs from Lier Belgium

Practical applications for end-fed antenna transformers and safe, effective grounding

G0KYA experience on hustler 5 BTV antenna

TN2T Online log at Clublog

Sound Card Interfacing for RTTY, PSK31, and SSTV

Demonstrates the construction and implementation of a **two-element phased vertical array** for 40 meters, utilizing _Christman phasing_ techniques. The author, W4NFR, details the process from building individual 1/4-wave aluminum verticals to integrating them into a phased system. The resource covers antenna spacing of 32 feet, elevated radial design, and the critical steps for tuning each vertical to achieve a 1.1:1 SWR before combining them. It also provides insights into calculating precise coax lengths for feedlines and the phasing delay line, emphasizing the use of an MFJ-269 Antenna Analyzer for verification. The finished system exhibits good front-to-back nulls, with an overall SWR ranging from 1.6:1 to 2.2:1, which is managed by an antenna tuner. The project includes detailed photos of the relay box, showing 12 VDC relays capable of handling 5KV, and the control box in the shack for switching between three different antenna pattern configurations. Static bleed-off chokes are incorporated for protection, and the construction emphasizes robust weatherproofing for outdoor elements.

open source software designed for the Yaesu VR-120 receiver.

The bass amateur radio IRLP group node 6391. victoria australia. info IRLP stands for the Internet Radio Linking Project. The aim of this project is to link radio systems separated by long distance without the use of expensive leased lines, satellites, or controllers.

Macintosh shareware, contains the full pool of questions for each of the five exams, and creates sample tests that will vary each time you take them and it will grade your exam.

Scanning railroad communications in the toronto area

Listen to the Baltimore City Police radio feed, carries all of the police districts in Baltimore City (BPD)

Carry a small stock of new and reconditioned parts for both rotators and control boxes for the following makes: CDE/HYGAIN , YAESU , STOLLE.

The GM3VLB Poor Man's Antenna Analyser

The general Catalogue of Publications contains all current publications,except the Standards currently in force, which can be found in the separate List of ITU-T Recommendations and List of ITU-R Recommendations.

Over two decades ago, the Kenwood TS-850S HF transceiver established itself as a robust performer, known for its excellent receiver and versatile operating features. This vintage rig, often found on the used market, continues to be a favorite among many amateur radio operators for its solid construction and reliable performance across the HF bands. Adrian's Yahoo! Group provided a dedicated forum for TS-850S owners to exchange insights, troubleshoot issues, and share modifications or operational tips. Such community-driven platforms were crucial for extending the operational life and maximizing the utility of classic transceivers, fostering a spirit of mutual aid among hams. Discussions frequently covered topics like DSP unit upgrades, common repair challenges, and optimizing the rig for contesting or DXing, reflecting the enduring interest in this particular Kenwood model.

Electronic surplus dealer

Comprehensive information page about bi-directional Beverages, including applications, construction details, and tips.

NN1G 30m 1W QRP transceiver by AA5TB

Supplier of Radio Telescopes and associated equipment since 1994.

Summary of discussion on stacking antennas on six meter band

The 3Y0K Log Online provides a detailed logsearch interface for the **3Y0K** DXpedition to Bouvet Island, scheduled for February 2026. This web-based tool, hosted on _Club Log_, allows users to access real-time QSO statistics and leaderboards. The interface includes interactive features such as a map for checking real-time propagation and colored boxes that reveal mode and time breakdowns when hovered over. The service supports HF bands and provides a structured overview of QSOs, including band/mode breakdowns and continent-specific data. Users can report logging inquiries and QSL requests exclusively through the M0OXO Online QSL Request System (**OQRS**). The site also offers additional resources like band plans, operating practices, and FT8 advice. The leaderboard feature, which includes clubs and Contest Club, ranks stations based on the number of band slots worked, with duplicate QSOs being discouraged. The expedition's impact on users' totals is also tracked, providing insights into new bands, modes, and DXCC entities worked. DXZone Focus: 3Y0K DXpedition | Club Log | Bouvet Island

This project details the construction of a **full-sized 40-meter vertical antenna**, born from a renewed interest in 7 MHz operation and a desire for improved effectiveness over simple dipoles. The author, K5DKZ, initially focused on VHF experimentation, which provided an inventory of aluminum tubing and fiberglass spreaders for this endeavor. Before this vertical, K5DKZ utilized an 80/40 meter inverted-vee trap dipole and a 40-meter broadband dipole, but now primarily uses a pair of full-sized, phased, quarter-wave verticals spaced 35 feet apart for serious 40-meter work. The construction involves a base-heavy design for stability, using a 44.5-inch section of 1-1/4 inch steel TV mast driven into 1-3/8 inch aluminum tubing, insulated by a 105-inch section of Schedule 40 PVC pipe. The assembly reaches 31 feet, close to the 32 feet required for a quarter-wavelength on 40 meters, with fine-tuning achieved by winding wire onto a fiberglass spreader. The design is explicitly presented as a foundation for a two-element 40-meter Yagi beam, outlining modifications like substituting aluminum for steel in the base and using an inductive hairpin match for the driven element. The article also discusses tuning considerations for a large 40-meter beam, noting the 100 to 200 kHz upward frequency shift when raised, and suggesting methods for installation on a tower. The author emphasizes the cost-effectiveness and good performance of the monopole approach, especially when multiple verticals are needed.

When building antennas for the Wifi band , a need for an easy way to check the antennas arise. This is a project for a 2.4 GHz band SWR Meter

List of european vhf uhf beacons by G4URH

The 2BCX Slim Jim by F.C. JUDD, G2BCX.

A project of a small antenna, just 50 cm for the 7 MHz band. An EH Antenna plan for the 40 meters band

Discussion group dedicated to those who enjoy monitoring radio frequencies in the VLF radio spectrum and slightly below the VLF spectrum (3-30 KHz).

FT100: the yaesu ft-100 yahoo group

Using bencher and Kenwood TS-50

Philippine Amateur Radio Association

Two meter band antenna

A 5/8 wave antenna, can be fed with ladder line from the center insulator to tuner.

Juste a little demo of the Kenwood TS-570 transceiver by F5UFX

reduce or completely eliminate interference from almost any local source whilst leaving the wanted signal relatively unaffected, even though it may be on the same frequency

Recorded QSO by italian amateur radio station in MP3 format

A wire dipole antenna for 80 meters band

By Prof. T. K. Mani - VU2ITI

Club in Stoke On Trent, England specialising in training for all classes of Amateur licence in the UK.

The German DX Foundation (GDXF), founded in 1996, was established to support HF DX activities - on all bands or modes - to rare countries all over the world

1296MHz M57762 * 16 Power AMP 16V 100A 1.6KW Input

Approximately 1,500 unique DX spots are typically visible on the _ODXC Web Monitor_ at any given time, providing real-time intelligence for amateur radio operators seeking DX contacts. This service aggregates spotting data from the _RW3XA-8 Obninsk DX Cluster_ node, presenting it through a straightforward web interface. Users can monitor current activity across various HF bands, identifying stations calling CQ DX or reporting rare entities. The platform supports both traditional telnet access for those using dedicated cluster clients and a Java-based web interface, catering to different operational preferences. It serves as a practical tool for contesters and DXers to track propagation, identify active stations, and plan their operating strategies. The cluster data includes callsigns, frequencies, modes, and spotter information, crucial for effective DX hunting. Integration with other spotting networks like _RBN_ and _PSK Reporter_ enhances its utility.

Homemade hamstuf, mostly homebrew antennas in Dutch

A group of hams decided to make those wishes come true and founded the Straight Key Century Club - a/k/a SKCC.

Associazione Radioamatori Italiani