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WebSDR located in Volgodonsk, Rostov Region, Russian Federation LN17CM currently providing VHF amateur radio bands coverage.

These are 200 Morse Code QSO`s which might typically be heard on the HF bands.

This site provides guidelines to build a G3TXQ broad band hex beam R.F. antenna for the five amateur radio bands, 20, 17, 15, 12 and 10 meters. The G3TXQ broad band hex beam is a new development and actually easier to build than the classic hexbeam by K4KIO

A large worldwide map of aeronautical service Frequencies allocation on HF bands dated 2002

The Answer To Suburban DXing On the Low Bands - by Merv Schweigert, K9FD

Legal Limit Link Coupled Balanced Tuner,for the amateur ham radio HF bands. This Tuner uses plug-in Coils sets for 40, 80, & 160 meters

How to build a high gain vertical antenna for the UHF amateur or CB Bands, by radio experimenters handbook

CB2HAM is a group for licensed radio amateurs focussed on converting quality CB radios over to the Ham bands.

Described is a simple inverted-V antenna which, when used with a balanced ATU, can be used on all the main Radio Amateur HF bands (80, 40, 20, 15 and 10m). The cental support is made in such a way that the wire can be coiled up for storage when the antenna is taken down.

Theory, Modeling, and Practical Applications By W5JCK, presentation in PDF File. This presentation focuses on Near-Vertical Incidence Skywave (NVIS) antennas, which are crucial for short-range radio communications, particularly in military and emergency contexts. It explores NVIS theory, antenna models, and installation criteria while debunking common myths about reflectors. Key topics include usable frequency bands, optimal installation heights, and the impact of soil quality on performance. The presentation outlines the best bands for daytime and nighttime use, emphasizing the importance of understanding propagation characteristics to enhance communication effectiveness within 200 to 300 miles.

IZ7GJX Comparing Kenwood TS-2000 to Icom IC-7000 on various ham radio bands

This article by OK1FOU describes how to build a relatively small loop antenna which can be placed for instance at the balcony. It is especially suitable for a two band antenna covering two adjacent amateur radio bands (10/14 MHz, 14/18, etc.)

A project for a portable antenna for amateur radio satellite reception, for 2 meters and 70 centimeters bands

Antenna covers all bands 80-10 meters + 30, 17, 12 meter WARC bands, need a lot that is at least 100 feet across.

CyberDX-CW is a software simulation of an amateur radio station monitoring the world. Generates a simulated radio environment, where the operator can tune all of the HF bands and actually hear computer generated station activity

The MFJ-940 VERSA TUNER II is a useful little antenna tuner for the HF-bands. However it suffers from a minor design error, which can be easily rectified.

A project for a multiband HF windom antenna by VE2CV and VE3KLO

A new SDR-receiver from the italian SDR developers community. Low-cost, DDS-less Software Defined Radio full coverage receiver for all HF bands, used with powerful software on the PC for multi-mode operation

A small company that specializes in antennas and accessories for radio hobbyists who enjoy DXing the AM broadcast and LW bands

An Active antenna designed for VLF and shortwave radio reception. A small antenna capable of excellent performances on low bands, made on a copper plate and introductio to active antennas.

Have you ever wanted to listen in on a serious SO2R DX contest effort? hear what the low bands sound like from New England? enjoy a contest without having access to a radio? This is your chance!

Planning and modelling Delta Loop antennas for all the ham radio HF bands include calculated wire lengths at each mid-band

This is a 6 band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. This is a 6-band receive only filter designed to protect your receiver front end and provide 45dB reject at the stop bands. Stop band reject may be limited by the relay isolation. Worse case isolation is at 28 MHz or 35 dB or better. Relay K3/K8 protects the filter during transmit via the PTT line. A 25-50ms delay must be used between transmit and PTT. Do not rely on your radio to provide adequate delay with out using the PTT. You logging software must be set to allow a delay between PTT and time of 1st transmit. This filter will not work with VOX or QSK keying as you will damage the filter.

The HF ham bands can be mysterious. Some work at night, some during the day. Some seem to be good for long distance contacts while some are better for nearby contacts. Even worse, they change tremendously from hour to hour and day to day. An overview on operating on HF amateur radio bands

We produce duplex filters for 6 m, 2 m, 70 cm, and 23 cm band but also for HF bands. Sella and produce products for Ham Radio Repeaters.

CB radio Communications on eleven metre CB channels and freeband including information on Citizens Band radio models. This portal provide several information about 27 MHz cb radio bands with a special attention to the DXing world of eleven meter band

The Yaesu FT-100 is a miniature mobile transceiver that provides coverage of the 160 to 6 meter bands plus the 144 MHz and 430 MHz bands

This is a 24 MOSFET Class E RF Amplifier, covering the 80 and 160 meter amateur radio bands.

The website offers a comprehensive guide on high-frequency (HF) skywave propagation for amateur radio operators. It explains HF radio propagation fundamentals, including electromagnetic wave properties, HF bands, and propagation modes like skywave, ground wave, and line-of-sight. The site focuses on the ionosphere's critical role, influenced by solar activity, in refracting HF waves for long-distance communication. Real-time monitoring tools such as DX clusters, beacons, and digital modes like FT8 assist users in tracking band activity and propagation conditions globally. Forecasting methods are detailed, highlighting scientific insights into solar-terrestrial interactions and ionospheric variability. The guide also covers advanced topics like NVIS and gray line propagation, ionosonde data, and propagation prediction models, making it a valuable resource for ham radio enthusiasts aiming to optimize communications

Easy to read set of band charts for the amateur radio MF and HF bands: 160, 80, 60, 40, 30, 20, 17, 15, 12, and 10 meter by W5JCK

WorkedGrids is a Windows application that displays a map showing the amateur radio grid squares contacted and logged in using a third-party logging program. WorkedGrids uses colors to display information on a per-band basis. Up to four bands can be displayed concurrently by VE2ZAZ Bert

FM dx logs, MW carrier offset monitoring, lists of RDS codes in use in the UK, London pirate bandscan and much more from a London QTH.

This document details the design and construction of a Vinecom 6N4 dual-band Yagi antenna for the 50MHz (6-meter) and 70MHz (4-meter) amateur radio bands. The antenna features 9 total elements (4 elements for 50MHz, 5 elements for 70MHz) on a 4.236-meter aluminum boom. Computer simulations using MMANA software predict 7.21 dBd gain on both bands with front-to-back ratios of 16.01dB (6m) and 15.37dB (4m). The design uses 12.7mm diameter elements mounted on a 32mm square boom, weighing 5.7kg total. Practical measurements with an MFJ-269 analyzer confirmed good SWR performance across both bands after element length adjustments.

Adding warc bands to the kenwood TS-820

JT65 is a digital protocol intended for Amateur Radio communication with extremely weak signals. It was designed to optimize Earth-Moon-Earth (EME) contacts on the VHF bands, and conforms efficiently to the established standards and procedures for such QSOs.

This document contains the detailed instructions to build a homemade lindenblad antenna using a twin-lead as dipole elements. This document contains 9 pages and includes a detailed construction sequence and some drawings to build this antenna for UHF and VHF ham radio bands

Windows shareware, automatic NCDXF beacon monitor for Radio Amateurs, SWL'ers and HF communication engineers. by Alex VE3NEA. It continuously monitors 18 NCDXF beacons on five bands, automatically detects the presence of the beacon signals, even in QRM and noise.

An excellent introduction to ham radio bands, which bands to use and when.

A slinky dipole antenna that covers almost all HF bands mede with a flexible 90-turn metal spring by N4SPP

Android ham radio DX Cluster, compatible with DX Spider, AR-Cluster, DxNet, CC Cluster, and CLX nodes. NKCCluster supports connecting to a user-defined DX cluster node, filtering DX spots per bands of interest

Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.

Definition of radio frequency bands, hf vhf uhf etc.

Committee of the Radio Society of Great Britain responsible for the management of repeaters on the various frequency bands on which repeaters are permitted to operate.

A recommendation for all radio amateurs how to use the bands, as revised at the Interim Meeting Vienna 2016, effective 01 June 2016.

An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.

This is a Ham Radio Software Transceiver for Amateur Radio. Software works in Windows, Mac and Linux. HamSphere is a community for Ham Radio operators and other radio enthusiasts. Amateur radio equipment is not needed. The Transceiver uses java technology and covers all virtual Ham Radio and Amateur radio bands from 160 to 6 meters.

This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)

NCDXF Beacon is a simple tool to monitor the NCDXF beacons on the Ham Radio bands 20m, 17m, 15m, 12m and 10m. Upon start the the time will be synchronized with an NTP server.

HamShield is a powerful VHF UHF transceiver that lets your Arduino talk to far away people using ham radio bands

The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes. Its purpose is to promote activity and good operating practice on the PSK modes on all amateur bands