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World-Wide 50MHz Beacons database maintanied by G0LGS provide a fully sortable table available also in a google map format

Microwave band plan - frequancy assigned to ham radio service

This FM wireless mike can transmit voice signals to any FM Radio receiver 100 meters away.

RF is causing strange issues on the touch sensor buttons, controlling inputs, volume, channels on Samsung LCD TV. Solution is to disable front touch panel.

The MD-2017 is a dual band DMR and Analog handheld transceiver with a frequency range on VHF 136-174 MHz and on UHF 400-480 MHz

AM Operation Using Power SDR with Flex and Other SDR Platforms

an overview, introduction or tutorial about the basics of electronics filters including the types of filter and the various filter design considerations and parameters

Ham or amateur radio is a fascinating hobby for all

Article about tropospheric propagation and the way in which radio signals at VHF and above propagate over greater distances than strictly line of sight in the troposphere

Togo DXpedition 5V7TT 10th-23rd October 2010

Antuino is an accurate instrument that can be used in the field to measure SWR, field strength, modulation, etc. In the lab, it can be used to sweep filters, measure gain, distortion, frequency response, etc. It works upto 150 Mhz. On the third harmonic, it is usable on 435 Mhz band as well (with reduced sensitivity).

The National Digital Link Cisar CisarNet Project

Article cover hints and tips on ham radio or amateur radio contesting and contests

A multi sked portal offering sked spots grouped by CFO CW Practice CW Academy Development Digital FISTS Down Under FISTS Scouting LoTW/eQSL MARS NAQCC NRR Other Images POTA Ragchew Satellite SKCC TBDXC VHF/UHF

Die kontestgruppe dk0bn

Website of RP DX GROUP. Group was found in 1992 in Pulawy, Poland.

Resource page for the ICOM IC-R75 at RadioReference

The problem with making your own trapped HF antennas is usually getting the coaxial traps tuned to frequency. This article explains a method using a RF signal generator at +10dBm output into the coaxial trap.

The radio beacon DI2AM on museum-ship in Rostock Schmarl

Calculate inductance online, with the cylindrical Coil Inductor Design Equations Formulas Calculator

Solomon Islands H44G/ Temotu Islands H40T - March 2013 by DL7DF

A further study of the spurious emissions from an FT847 on 70 MHz by G7CNF

An article on how to measure electrical current with a digital multimeter or analogue multimeter.

Read all the key details about Vacuum Tubes or Thermionic Valves that provided the foundations for today's electronics technology.

Sri Lanka 4S7 March 2014

About usage of DTMF Dual Tone Multi Frequency in ham radio applications

A basic YAGI UDA online antenna calculator, accept as input frequency, number of elements, diameter of parasitic element and boom diameter. This online calculator will generate a basic design data including each element length and spacing.

Online Log for TX5N DX Pedition to Austral Islands 2022

Generate APRS Passcode using PHP for use in Amateur Radio APRS Applications when connecting to the APRS-IS Network

This quick-start guide is an attempt to provide some help when coming to terms with the R20 and the manual

A simple reading that allows to understand the basic working concepts and uses of an oscilloscope

A CW Contest Simulator, a simulator for the weekly CWT contests sponsored by CWops, based on Arduino Nano

The map display allows you to select by locator, or clicking on the map, where you want to calculate the probability of Sporadic-E by building a combination EPI, Es Probability Index, based on factors using many of the known parameters which can effect Es. T

How test transistors and diodes with a simple digital multimeter.

Allocation of 4 meter band worldwide

Liberia 2011 5M2TT DX Pedition Official web site

Hummelmasten is a German tower manufacturer, provides consultation, engineering, but also assembly and full tower installation

Introduction to operating on microwave bands at VKFAQ

What are the Differences between UV5R and UV82 Series

Ein satellit entsteht und andere amateurfunkaktivitäten...

GM4YEQ Galashiels and District Amateur Radio Society (GDARS)

Stand Alone Software Defined Radio, direct sampling receiver from 30 kHz to 1700.00MHz continuous frequency range, LAN interface for remote access

The KD9SV Front End Saver in a new fashion. If you use a separate receive antenna, you need a Front End Saver to eliminate the possibility of blowing out your receiver's front end while using an auxiliary receive antenna.

Check out these vintage QSL cards from the 20th Century in this gallery of old QSL cards.

Notes on using a modified R7100 with discrimator tap

RadioReference page on Radio Shack Pro-97

A cavity backed antenna is a practical slot antenna tipically used in microwave applications

Afghanistan 2011 DX Pedition

This article provides details on building a 6 Meter J-Pole antenna using PVC pipe for an enclosure. This antenna uses flat 450 ohm Window Line for the tuning stub.