- The Pfeiffer Quad was described in QST and has the desirable feature that it is smaller than a standard cubic quad but does not compromise performance very much. The Pfeiffer design is rather difficult to construct because of the complicated linear loading networks required.
- Log and Contest Program, Windows based, network capability, CW via COM/LPT, SSB/RTTY via soundcard, trcvr-Steuerung (2TX for SO2R etc.), DX-cluster via packet, internet or telnet, statistics(DXCC, IOTA, locators...), log import/export, QSL card handling(printing tool), grey land map etc. etc. and freeware!
NCDXF/IARU Beacon Project
- The NCDXF, in cooperation with the IARU, constructed and operates a worldwide network of high-frequency radio beacons on 14.100, 18.110, 21.150, 24.930, and 28.200 megaHertz. These beacons help both amateur and commercial high-frequency radio users assess the current condition of the ionosphere
RACOM - Radio modems
- RACOM is a Czech company specialized in design and production of radio modems and other devices for wireless data networks for radio channels from 140 to 900 MHz. RACOM radio data networks are suitable for data transfer in telemetry & SCADA applications, transaction networks, security systems, IP networks and firts of all mobile tracking and fleet management.
An Introduction to FlexNet
- Features and operation of FlexNet packet networking software are discussed. Details of the software architecture, RMNC and MS-DOS hardware platforms, applications, user interface, adaptive parameters, and routing techniques are presented.
Test Equipment Depot
- New and Pre-Owned Agilent, Avcom, Fluke, Hewlett Packard, Instek, Leader, LeCroy, Tektronix,and more ..Oscilloscopes, Spectrum Analyzers, Network Analyzers, Power Supplies, Video Test Equipment, Generators, Meters and more
AST Global Electronics
- New and Pre-Owned Agilent, Avcom, Fluke, Hewlett Packard, Instek, Iwatsu, Leader, LeCroy, Tektronix, etc. Oscilloscopes, Spectrum Analyzers, Network Analyzers, Power Supplies, Video Test Equipment, Generators, Meters and tons more
Rádio Nacional de Angola
- Provides broadcast times, frequencies and power of the network emissions. Airs mediumwave, FM, shortwave and RealAudio broadcasts
- Operates Singapore's largest radio network with 11 FM stations and 3 shortwave stations providing sound entertainment and up-to-the-minute news and information locally and internationally.
- Israel Broadcasting Authority guide to the IBA radio networks known in Hebrew as Kol Israel - the Voice of Israel.
- One of several Colombian broadcasting networks heard on AM and FM and worldwide on 5076 kHz in the 60 meter band.
- A smarter version of the Smith Chart program. It allows you to dynamically generate impedance point plots as you configure each design element of an impedance matching network. Has an extensive Help file with a Wizard that tells you what steps to take in designing a matching network for a given load impedance. Complete Windows installation kit by w9dmk
APRS on your phone
- iBCNU is an APRS GPS position reporting and text-messaging application for the Apple iPhone. When position reporting is enabled, the application will periodically send out location of your iPhone using either 3G or WiFi network and iPhone's built in GPS receiver
Build A Vector Network Analyzer
- The VNA (vector network analyzer) is an essential tool for measuring the complex impedance of a circuit at a given frequency. Article on how to build a Impedance analyzer.