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Testing performances of indoor antenna. A comparison of a magnetic loop antenna vs a classic wire dipole done using wsprlite on 30 meters band.

Archive of yaesu ft-1000MP digests since january 2001

Electrically shortened dipole antennas, article by Mark Connelly, WA1ION

Article on ham radio mobile operation from Andy D. Crouch N5NDD

All about amateur radio lincencing in India

May SwaziLand Web Page

All about dipole antenna construction

A magnetic loop antenna for the VHF band, featuring a high gain that can be compared to a quarter wave vertical antenna

What makes a good solid-state amp ? by Adam Farson, VA7OJ/AB4OJ, May 2002

The vertical Double-Zepp 2x7 m is a very simple, effective 8-Band-antenna. The end of the Dipol must be 5-10 m above the ground

Meteor scatter, gives quick view over meteor scatter and scatter events on vhf, lists email addresses of vhf radio amateurs qrv in meteor scatter

Operating magnetic loop antennas requires careful consideration of RF safety, particularly regarding near-field magnetic field intensity. This resource presents calculations for magnetic field strength (H-field) at various distances from a magnetic loop, emphasizing that the H-field is significantly higher than the E-field in the near-field region due to the inductive nature of the radiating element. It provides specific formulas and examples for determining safe operating distances based on power levels and loop dimensions, crucial for compliance with RF exposure limits. The analysis compares calculated H-field values against FCC and ICNIRP maximum permissible exposure (MPE) limits for controlled and uncontrolled environments. It demonstrates that even at QRP power levels (e.g., 5W), the H-field can exceed MPE limits within a few feet of the antenna, necessitating greater separation distances than often assumed for electric field considerations. The practical application of these calculations helps amateur radio operators configure their stations to ensure personnel safety and regulatory compliance when deploying compact, high-Q magnetic loop antennas.

Allow CW/SSB reception of radio amateurs bands by PA2OHH

Aanarad Trabzon department turkey

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

Fixing the IC-7000 noisy audio that can occur when IC-7000 audio output is connected to Hi-Fi earphones or external speaker.

GAP Titan DX 10 15 20 40 meter performance tests by AA3RL

40meter band beacon on 7,039.6 MHz

This site is dedicated to the repair, restoration, preservation and sale of old collectable radios, both bakelite and wood.

Shelby amateur radio club's VHF emergency net is open to all within the repeater's coverage area. 146.880 and 147.345 are the repeater frequencies. Shelby Radio Club is the sponsor of the Shelby hamfest.

Spipral antenna principle by a concept of Bill Petlowany, K6NO. Tak Antennas are based on this principle, using spirals as dipole linear wires.

Discussion at eham about wire size used in wire antennas, and how it affects the gain of the antenna

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.

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.

Design for a dual-band CW transceiver using the AD9834 Direct Digital Synthesizer

W0IPL article on NVIS Antenna

ON6MU Low Power amplifier

Satellite infos and links by Larry Johnston

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

A complete EmComm portable station article on eham.net by K9RFZ

A led electroluminescent radio receiver

Logging program for Manchester Mineira contest CWJF

Quick and Dirty CW Netiquette

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

Egyptian Radio Amateurs Assembly

Eham user's review on the Heathkit SB-200 HF amp

Great Circle Map for Linux, available for Debian, freeware by SM3GSJ

A cheap rf signal generator for 2.4 GHz

The project is an AVR ATMega328P based AX-25 1200 AFSK Digital Repeater, suitable for APRS digipeating

Manufacturer & distributor of vacuum tubes for all applications, we guarantee best service,pricing & delivery and we also guarantee sameday shipping.

by SV2AEL

A home made project to reduce noises from lower bands, an X-Phase QRM Eliminator project that can help you a lot

Troposcatter, 50 MHz meteor scatter, ground gain for eme, radiation angle, by OZ1RH

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

Do you want to measure antenna impedance at resonance? With this Antenna Scope, you have a simple RF Bridge for getting started in an exciting part of Ham Radio, building your own Antennas that work well

October 2000 Ham radio dx-pedition

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

The ATV User's Group is a subgroup of the Auckland VHF Group, Club call ZL1BQ, compromising of persons interested in the transmission and reception of Amateur Television

ITELITE manufactures omnidirectional, sector and directional antennas 900 MHz 2.4 GHz 3.5 GHz 5 GHz 5.8 GHz antennas.

Kennewick, Pasco Richland