Search results

The webs premier Ham Radio discussion forums

Manufacturer of popular TinyTrak APRS Tracker offer Packet radio tools, wxtrack interfaces, TinyTrack3, a GPS position encoder, PicCon controller for transmitter hunting, GST-1 and GST-2 GPS format converters, and PeekPack, a packet radio monitoring tool.

Create - Reliable antenna and antenna rotators from japan. Manufacturer of amateur radio products, HF VHF UHF antennas, antnena towers, antenna rotors, HF Log Periodic Antennas, VHF UHF wideband amateur radio antennas

K4TR Manufacture and sell simple dipoles, half square 2 wire phased vertical arrays, end fed zepp antennas, G5RV antennas. 1:1 baluns

Tennamast design and manufacture a wide range of fabricated metal goods, Antenna masts, Wind-sock masts, and masts for holding such systems as CCTV, Loudspeakers, Lighting units

Comparison chart of most popular VHF UHF amateur radio transceivers

Java script antenna calculators for ground planes, half wave verticals, quad antenna, 5/8th wave vertical antenna, dipole and inverted vee antennas

Amateur radio dealer, scanners and accesories Burnaby, BC, Canada

Frequency Filer is database program designed for people who use a great many different radio frequencies. It is primarily intended for amateur radio operators, short-wave listening enthusiasts and scanner users. The program makes it easy to keep all of your important frequency information in one place, displayed in a logical format to facilitate easy retrieval. Frequency information can be displayed as a list and can be viewed on a world globe. Other features include easy data backup and custom field names. Included is database import utility that can be used as a general file conversion utility. The globe display can also be used as general geographic aid for countries, cities, states, rivers, and lakes. You may even find your home town. Windows Shareware

Packet Modems, tnc, portable tnc manufacturer

Freeware by AE4RV. MorseQuiz is a Morse Code Speed Trainer for DOS/WINDOWS that can help you improve your code copying ability.

Pc sound card interface for PSK31 MFSK Baudot for the yaesu FT-817

Yaesu Kenwood, drake MFJ JPS JRC AOR Daiwa Hygain Weltz Uniden Lowe Black Jaguar Trident dealer

Pictures of GAP Titan DX vertical antenna assembled by IW5EDI

A youtube video of a Short Delta Loop antenna, only 8,5 meters per side. This project use a loading coil of 56,7 uH for electrical matching.

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

About collinear array antennas

Notes on bazooka antennas by Katunk: a portable field antenna, sometimes called the double bazooka or a coaxial antenna.

Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground.

An cheap homemade azimuth and elevation rotation system using an Arduino/AVR.

Welcome to the Ham Radio Shack of V31MD at Palmetto Place Guesthouse. The Shack is available for rent on a daily or weekly basis.

Lets you automatically record your favorite radio programs from Web Radio broadcasts, and then listen to them later on your PC, MP3 player or Pocket PC.

This is a group for discussing Yaesu's great VX-7R handheld amateur radio.

This page describes a very simple and inexpensive mobile mount for an ICOM 706MKIIG radio

Inline RF Power & VSWR Meter. A DIY meter 0 to 30 Watt with Average and Peak. Circuit Description, Arduino Nano software code and part list to DIY your own Digital SWR Meter

Hand held portable, 6 meters and satellite antennas

WA6CDE write about a major problem, a design flaw on two Icom 706 caps that have corrosive liquid that can seriously damage this icom transceiver.

Douglas County Sheriff dispatch channel

10 to 20 meters band log-periodic antenna project with SWR Plots, boom lenght and element spacing.

The basic antenna is a vertical monopole, using elevated radials to complete the ground plane by k5oe

Here are construction plans of a Turnstile antenna that can be used for space communication on the 2 meter amateur radio band. Specifically for 145.80 mHz

Converting Computer Power Supplies (PSU) to stabilized 13.8 V DC 20 A

Lincomatic's Homebrew WiFi Antennae, Cantenna, Toothpick Monopole, Patch Antenna, BiQuad, collinear wifi antenna all in one page

One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom

The varieties of twinlead J-Poles and some performance standards, L. B. Cebik, W4RNL

Ham radio blank log sheets to log your contacts

MQ-1 four band HF beams 20,15,10,6 meters MQ-2 six band HF beams 20,17,15,12,10,6 meters, beam antennas and Hybrid Quad antennas

46ft multi-band antenna for small gardens. Works well on 80m. An excellent DX performer and is an ideal replacement for your half size G5RV

Autotena, a Taiwanese manufacturer, offers a diverse product line focused on RF communication antennas and related accessories. The resource details various antenna types, including **4G/3G LTE wideband high-gain low-profile antennas**, land mobile wideband antennas, fiberglass omnidirectional designs, and GPS mobile and marine antennas. Specific amateur radio offerings include NMO VHF load coil gain antennas, VHF whip gain antennas with PL-259 connectors, and UHF NMO mount antennas with 3dB/5dB gain. The company also produces antennas for CB and 10-meter amateur bands, such as aluminum broadband 26-30MHz antennas and big copper coil broadband 26-30MHz antennas. Additionally, the site showcases **RF amplifiers** for CB, HF, VHF, and UHF bands, including professional-grade base station amplifiers with 100% EIA duty cycle. Handheld antennas, PL-259 type mobile antennas, magnet mount antennas, and external CB speakers are also presented, alongside various mounting kits and cable assemblies.

Examines the operational principles of loading inductors within **mobile HF antennas**, clarifying their role in canceling capacitive reactance rather than physically replacing missing antenna length. It meticulously details how current distribution is influenced by stray capacitance and termination impedance, rather than the physical length of wire within the coil itself. The resource provides a deep dive into the behavior of inductors, emphasizing that a loading coil functions identically to any other inductor in an electronic circuit, with its characteristics determined by its design and surrounding impedances. This article specifically addresses common misconceptions, such as the idea that loading coil current is reduced by standing waves or that coils introduce a significant electrical-degree phase delay related to conductor length. It explains that magnetic flux coupling within the coil causes charges to move at light speed, resulting in minimal time delay across the inductor, especially in well-designed, compact units. The author, W8JI, presents both theoretical explanations and empirical measurements to support these points, including data from various antenna configurations. Furthermore, the content clarifies the distinction between voltage-current phase shift within an inductor and actual current time delay through it, using **SPICE models** and real-world observations. It highlights that large current taper in a loading coil often indicates poor antenna or tank circuit layout, rather than an inherent property of the inductor itself. The discussion also touches on the impact of stray capacitance on inductor Q and bandwidth, offering insights into optimal form factors for different applications.

An air cored 1:1 balun for 3.5 to 30.0 MHz

A portable end fed HF antenna article written by W0CH

Also known as W0MHS Loop Skywire or Full Wave Loop Antenna, here you can find N1SU interesting observations on this antennas.

PstRotator handles just about every controllable rotator in common use: Prosistel, Green Heron, HyGain, RC1 MDS, Rotor-EZ Idiom Press, Yaesu Az and many more PstRotator includes automatic tracking for satellite or EME communications, using programs like WSJT, VQLog, TACLog, Z-Track, GJTracker, EME System, Trak_SM, WXtrack, WinOrbit, Orbitron, Nova for Windows, Sat_Explorer, SatPC32, Win-Test. PstRotator supports remote control over TCP/IP.

Memory management programming software for the Yaesu VR-5000 receiver

The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF

manufacturer of VHF and microwave antennas and related products, from 50 MHz through 10 GHz

WLOG2000 demonstrates a comprehensive logging software solution tailored for amateur radio operators, shortwave listeners (SWLs), broadcast listeners (BCLs), and CB enthusiasts. It integrates essential utilities such as DX Cluster and DXtelnet for real-time DX spotting, along with PSK and PSK-Pbbs capabilities supporting both TNC and PC sound card interfaces. The software also features radio and rotor control, CDbook interface functionality, and a wide array of other logging and operational tools, making it a versatile station management platform for various radio activities. Franco, HB9OAB, developed WLOG2000 to provide a robust, free logging solution, with continuous updates available from the homepage. The software supports popular digital modes like RTTY, SSTV, KGSTV, EASYPAL, FT8, and FT4, alongside traditional CW operation. It offers rig control for major manufacturers including Kenwood, Yaesu, and Icom, facilitating seamless integration with existing shack setups. Users can track awards like DXCC, WAS, WAZ, and WAC, and manage QSLs, enhancing the practical application for contesters and DXers.

A homemade Magnetic Loop antenna from a spare 3m length of RG213 working from 30m to 15m with a 130pF tuning capacitor

This article describes how to make a quadrifilar helix (QFH) antenna easily, from inexpensive materials: uPVC plumbing pipe and RG-58U co-axial cable