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APTDecoder is a free software for recording and decoding signals transmitted by NOAA POES APT enabled weather satellites. It is run on a NT-based version of Window

Design and manufacturing of electronic components, kits, and accessories for the amateur and commercial communications. CMOS Keyers, W1AW receivers, PC borads kits

Simple DIY stealth apartment antenna for 20m and 40m. It is basically a ZigZag quarter wave dipole antenna

One of the most popular Ham-lore rumors is a balun's performance can be tested or evaluated by grabbing the coax and watching for an SWR change. This is probably one of the worse test-rumors circulating

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

Located in Mareeba, Australia.

A page with several coax cable characteristics comparison. Includes RG-316 RG-174 RG-58/U RG-59 RG-213/UBX RG-213 FOAM AIRCOM plus AIRCELL 7 ECOFLEX 10 ECOFLEX 15 H-155

Connecticut's largest online scanner site

A large locator map of europe available also on printed format by remoteqth.com

The image is a all in one map of ITU Zones displaying worldwide regions and zones. It provides information on ITU Regions at IARU website, aimed at radio amateurs and technical users. Image size is in hight resolution and jpeg format, free to download.

K2HYD illustrate how to home made ladder line

Manufacturer of throphies Awards, Plaques, Gifts, Banners

pictures of a 80 mt band EH antenna by YC5NBX

Horizontal HF 6-Band turning arranging emitter with 2 elements Maria Maluca

A 40m through 20m QRO End Fed Half Wave Antenna Coupler by Steve Yates - AA5TB

Mods for ICOM IC-706

Ham radio shop with online catalog

An easy to build antenna for ground reception of NOAA weather or amateur satellite signals. Double cross antenna by Gerald Martes

It consists of a group of JavaScript driven web pages that are intended for use as a quick reference for Ham Radio operators or just anyone interested in electronics. Offer calculators for Resistors, capacitors, inductors, power supplies, filters, attenuators and antennas

Mizuho Tsushin Co. was a small Japanese manufacturer of QRP radios and kits, shortwave receiver accessories, and AM broadcast band receiver kits and antennas

Comparing two wonderful radios by S52ow

The Chameleon V1 HF Multiband Antenna is a mobile antenna that can also be used as portable. Lightweight mil whip antenna system with 10 BANDS capability 6m, 10m, 12m, 15m, 17m, 20m, 30m, 40m, 60m & 80m.

Online shop based in hong kong offer batteries mic speakers adaptors programming cables earpieces telescopic antennas handheld antennas desktop chargers handheld speakers. Kenwood Icom Yaesu and Alinco dealer

How slinky loaded beverage antennas works, includes eznec models

This resource presents a technical guide detailing antenna measurement theory, focusing on the fundamental electromagnetic principles governing antenna operation and characterization. It delineates the three primary spatial regions surrounding an antenna: the reactive field (0 < r < lambda/2pi), the radiating near-field (lambda/2pi < r < 2D2/lambda), and the radiating far-field (r > **2D2/lambda**). The guide defines key antenna parameters, including polarization, input impedance, VSWR, directivity, gain, efficiency, Effective Isotropically Radiated Power (EIRP), antenna noise temperature, and the G/T parameter. Radiation patterns are discussed, with examples of both rectangular and polar forms, emphasizing the determination of patterns in the far-field region for constant radial distance and frequency, typically characterized by a main beam with **3 dB** beamwidth and sidelobes. The document further elaborates on the mathematical definitions of these parameters, such as the Poynting vector (E x H*) for electromagnetic waves and the relationship between antenna gain and directivity. It also introduces related terms like mixers, which are critical components in antenna measurement instrumentation for frequency conversion (fIF = fRF +/-nfLO). The theoretical framework provided supports the scientific analysis of antenna performance, applicable to various antenna types and operational frequencies. DXZone Focus: Technical Guide | Electromagnetic Theory | Far-Field Region | G/T Parameter

Determine the K-Factor used as a multiplier when constructing half-wave antennas.

Transporting Yaesu FT-817 along with antennas and other accessories.

SDR-RADIO.com is a Windows console for SDR receivers and transceivers. Designed for the commercial, amateur radio and short-wave listener communities, the console provides a powerful interface for all SDR users. Many SDR owners have made their radios available over the internet. Just look at the Web Servers page for a list of the radios you can use. You do not need a licence to use this sodftware with RFSPACE, FUNcube Dongles, Soundcard (SoftRock) and low-end SDRs.

ARRL pdf file on how remove car noise from your radio. Modern vehicles are RF noisy environments. Come learn how to identify and silence yor mobile noise sources, by WA6PDP

A 7 elements yagi beam monoband antenna for 14 Mhz by VE3GK

How to extend your Wireless Network by building a 2.4 gHz wifi cantenna

Presented here is a transceiver to computer sound card interface complete with automated transmit key function. A sound card interface is simply the audio coupling of a computer soundcard and a transceiver to allow various computer applications that send and receive SSTV, RTTY, PSK31 and other similar modes based on soundcard generated signals.

Audiocorder is a VOX program which allows your Macintosh to act as an audio recorder

Video construction of a multiband HF trapped dipole antenna based on a variation of the classic W3DZZ design

Satellite antenna design and systems engineering software for windows

WiNRADiO for Mac, WiNRADiO provides Apple Macintosh support for our most popular receiver, the WR-1550e, a medium-range external receiver with frequency range 150 kHz to 1.5 GHz

Animated quad and yagi comparison. You can see antennas' characteristics behavior in a vertical plane with changing of the height.

Learn basic theory on antennas, and notes on homebrewing efficient shortwave antennas

The interface described here has been verified to work on the TH-G71 and also the the TH-F6A/TH-F7E

Satellite Finder is a way to accurately point satellite dishes at communications satellites in geostationary orbit.

Notes on homebrewing antennas by Chris G4CYA, from gamma matching, to phasing antennas, splitters and combiners, baluns and measuring techniques.

This program needs no other explanations because it is just a terminal program. The only difference is that it is multitasking. This means that you can have multiple connects and you can YAPP without restrictions. You can receive as many YAPPs as you wish simultaneously. If you have more than a RadioPort (You have more than a TNC) you can connect in any RadioPort. You can have also unlimited number of connections (about 100).

Freeware remote control software for Kenwood TS-870 by EC4DFP

Nagara Japanese ham radio antenna manufacturer

A quarter-wave vertical antenna design for HF operation offers a practical solution for radio amateurs seeking a compact and efficient multi-band radiator. This project details the construction of a 5-band HF vertical, drawing inspiration from established commercial products such as the _DX COMMANDER_ and the MV6. The design emphasizes ease of assembly and disassembly, making it suitable for portable operations or installations with limited space. The article provides insights into various construction methods and offers practical tips for building a robust yet lightweight antenna. It highlights the benefits of a vertical configuration for DX contacts, particularly on the lower HF bands, and discusses real-world performance observations. The antenna is designed to cover multiple HF bands, providing versatility for various operating scenarios. Operators can achieve significant DX results with this type of antenna, often comparable to more complex arrays, especially when deployed with an effective ground system. The project aims to empower hams to build a capable antenna without significant financial outlay.

Overview, summary, tutorial about the dipole antenna or dipole aerial that is widely used on its own and as the basis for other antenna designs.

An halo stack antenna for 70 cm by KR1ST

Typical question about scanning from a prospective new operator

40mm diameter grey PVC pipe with a length of 9.5cm