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Picture and reference links for STL Small tumed loops antennas by DJ3TZ

A portable three element 6M yagi for less than twenty pounds

The NG7M Web Cluster, maintained by W7CT and NG7M, offers real-time DX spotting information crucial for amateur radio operators engaged in DXing and contesting activities. This service aggregates DX spots from various sources, presenting them in a user-friendly format accessible via both web interface and traditional telnet protocols. Operators can monitor band conditions, identify rare DX entities, and track propagation paths across multiple amateur radio bands. This cluster supports a wide range of operating modes and bands, facilitating efficient station operation for both casual DX chasers and serious contesters. The system integrates data from the Reverse Beacon Network (RBN) and PSK Reporter, enhancing its utility by providing automated CW and digital mode spots alongside manually entered voice spots. Access methods include a direct web interface for graphical display and a telnet connection for command-line interaction, catering to different operational preferences. The cluster's data stream is continuously updated, ensuring timely information for making critical operating decisions.

Magnetic Loop Antennas for The Radio Operator with Limited Space, a two part series of articles on how to construct a magnetic loop antenna, including directions on selecting high voltage tuning capacitor

Amateur Radio club for International Falls and surrounding area.

Shortwave listeners and amateur radio operators interested in _numbers stations_ can engage with this mailing list, which serves as a platform for discussing the enigmatic transmissions. The resource facilitates the exchange of information regarding these unusual broadcasts, often associated with intelligence agencies, by allowing members to share observations, decode attempts, and theories. It provides a community space for those who monitor the HF spectrum for these unique, often automated, voice or digital signals. Participation on the list enables members to contribute to a collective understanding of numbers station activity, including changes in frequencies, broadcast schedules, and message formats. While specific technical analysis or signal processing techniques are discussed by members, the primary function is information sharing. The list is administered by csmolinski at blackcatsystems.com, and prior postings are archived for reference, allowing new members to review historical discussions and data.

Over 100 amateur radio beacon audio files are presented, offering a direct auditory experience of propagation conditions across a wide spectrum of frequencies, from 1.8 MHz to 47 GHz. These recordings, primarily captured by IW3FZQ and IK3NWX, document signals from beacons such as DK0WCY, IY4M, GB3RAL, and S55ZRS, providing a valuable resource for **propagation study** and **beacon monitoring**. Each entry in the list specifies the beacon's callsign, its operating frequency in kHz, and the recording operator. This compilation includes signals from beacons located in various grid squares like JN55VF, JO44VQ, and IO91IN, illustrating diverse geographical origins. The frequencies covered span the 160m, 80m, 40m, 30m, 20m, 17m, 15m, 12m, 10m, 6m, 4m, 2m, 70cm, 23cm, 6cm, 3cm, 1.2cm, and 6mm amateur bands. Users can listen to these recordings to identify characteristic beacon tones and observe signal strength variations. The resource also invites other radio amateurs to contribute their own beacon audio files, fostering a collaborative archive of propagation data. The last update to this collection was on March 24, 2009, indicating a historical snapshot of beacon activity. Accessing the files requires the Real Player software.

Kenwood TH-D7(G) and TH-D7A commands reference

A 2 element 40 meters band parasitic delta loop antenna project with pictures and details

Article by G4AON about a 4 and 2 Element Quad Antennas for the 6m band

VHF UHF SHF Toplist including DXCC and EME-Initials

eham reviews of the Yaesu FT-9000

DXpedition to Pitcairn Island in January 2000 to celebrate OH2BR 40 year long Amateur Radio career

Aduino-based Amateur Radio Antenna Rotator Controller that can emulate the Yaesu GS-232A or GS-232B interface by K3NG

On these pages you will find articles and pictures reagarding a renewed Drake TR7 by DK4DDS

A relaxed meeting place for hams and their families , set in a resort environment with all the desired ham radio facilities. Keningau Sabah East Malaysia

This is a page designed to help the EMCOMM operator thinking of going portable. It will describe a way of having VHF UHF HF voice and digital in one box

A home page about CW and QRP.

Vertical phased antenna systems plans by G3WZT

We are the Radiating Element of the tri-state area composed of South Dakota, Iowa, and Minnesota.

The Northern Greece Contest Team (NGCT)official home page

Wiring the PK-232MBX to the Yaesu FT-1000MP or FT-990

In this page show interest information on Ham Radio in Honduras.

Offer various contest logging programs, for scandinavian contests, SPDX, PAXX, OK/OM Contests, IARU VHF Contest, Portugal Day DX contests, HSC contest, various polish and norwegian local contests and other utilities

Types of coax-cable with rf attenuator calculator, line loss calculator form includes an antenna gain calculator. This coax loss calculator can help you on choosing the right cable for your antenna sysmte.

KU6S SBARA South Bay Amateur Radio Association

DX Cluster server software by F5MZN

End-Fed Half Wave matching unit project, based on a FT140-43 with SWR plot tests made using capacitor and without.

First Amateur Radio contest club to be organized in the state of Florida

Schematic diagram and description of a magnetic loop antenna that works from 10 to 20 meters band, made from junk

Dedicated to the RTTY contesters worldwide by DK3VN, contest rules and summaries,

Magnetic Loop Antenna for 20/15m with Remote Tuning by George Szymanski

A parabolic dish ring feed optimum resonance frequency of 1325MHz

ZL9CI, 1999 DXpedition to Campbell Island

DK7ZB's fan dipole designs address the challenge of operating multiple HF bands with a single feedline, providing practical construction details for **multiband wire antennas**. The resource outlines specific lengths for half-dipoles across various band combinations, including 10-15-20m for classic bands and 12-17-30m for WARC bands. It emphasizes the importance of proper spacing between resonant elements to avoid impedance interaction and high SWR, a common issue when frequencies are too close. The article details the use of **current baluns** built with FT240-43 or FT140-43 cores, specifying turns and cable types for 1KW and 400-Watt power levels. It includes a correction table for adjusting dipole lengths based on frequency shifts, aiding in fine-tuning resonance. The 20+40m dipole is noted for its ability to operate on 15m with an ATU, demonstrating versatility.

The 2000 CQ WW Multi-Multi operation by the GM0B contest group from Benbecula, Outer Hebrides, Scotland, is documented, providing insights into a significant **DX contest** effort. This resource outlines the station setup, operational strategies, and team composition for a large-scale, multi-operator, multi-transmitter entry. It details the logistical challenges and technical solutions employed to achieve competitive results from a remote island location, a common scenario for **DXpedition**-style contest operations. The page offers a glimpse into the practical application of contest rules and the coordination required for a successful multi-operator effort. It serves as a historical record of the GM0B team's performance in a major international contest, allowing other contesters to compare operational approaches and understand the scale of such an undertaking. The information can be useful for those planning similar contest expeditions or studying past contest strategies.

The Cabrillo log format specifications, examples and templates.

Guest house with acomodation for 3 more people in Uruguay

CAT (Computer Aided Tuning) connects computers with ham radio. Yaesu FT-890 intercace and ICOM IC-Q7 schematics by DK7IN

Coordinamento del radioascolto``Official website, in italian

Packet radio applications by Luis Fdo. y Jose Carlos Ramirez, EB7CJO in Spanish

"Sezione A.R.I. di Torino presents ""Sala Radio"" dedicated to Duilio Secoli I1TMD"

Kenwood TS-480HX Resources at eham.net

The RARC is the oldest ARRL affiliated club in Virginia. Founded in 1929 by Ted Mathewson, W4FJ one of the earliest Ham Radio Operators licensed by the FCC.

Island DXpedition and portable operations, including present, up-and-coming operations, IOTA, NON-IOTA, IOSA, IIA, ILIA, DIB, Lighthouse, and other Island Award Program operations

The Swan Island DX Assn. is based in Raleigh, NC.

The Roma2 WebSDR provides remote access to a software-defined radio receiver situated in Rome, Italy, enabling users to listen to various amateur radio bands. It features a user-friendly web interface with controls for audio gain, DSP filtering, and bandwidth selection, including options like **2.4 kHz**, **3.0 kHz**, **4.0 kHz**, and **6.0 kHz** filters. The system supports both desktop and mobile device access, with a dedicated mobile version available for optimized performance. Operating as part of the _ROMA SDR Network_, it logs user activity, automatically recording time, frequency, and DXCC information for each session. The platform also addresses common browser-specific audio issues, such as white noise in _Chrome_, by suggesting workarounds like muting/unmuting or using alternative browsers like Firefox.

The Hualapai Amateur Radio Club is located in Kingman, Mohave County, Arizona, USA (DM25xf).

Quad antenna homebrewing, mechanical considerations by IZ7ATH