Search results

Douglas County Sheriff dispatch channel

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

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.

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

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

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

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

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

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

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.

Mobile antennas, loading coil current, and loaded antennas. efficiency and electrical rules. Loading inductors used in mobile HF antennas.

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

A portable end fed HF antenna article written by W0CH

Memory management programming software for the Yaesu VR-5000 receiver

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

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

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

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

Ham radio blank log sheets to log your contacts

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

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.

Audio Kit is a collection of four iphone applications which are essential for those working in audio and sound. A real time Spectrum Analyser, a Scope to display waveforms, an SPL Meter, and a sine wave Signal Generator.

An introduction to portable shortwave receivers and sw radio. What to look for in a good portable. Reviews of Sangean ATS505. Band info and frequecies.

AGWTracker APRS program with lot's of features, map display, and more

This is a collection of articles, generally from QRP-L, about QRP operations and portable antennas. However, anything that looks interesting to me might end up here. These articles are posted here primarily for my own use; however, all are free to browse.

eQSLMaster is a HAM radio program, that allow to perform various functions using the Electronic QSL Card Centre (eQSL.cc). With eQSLMaster users of the eQSL.cc system have the ability to upload an entire ADIF format log file (or single QSO) and have it deposited into eQSL central database using LogServices.

Buildin a VHF Jpole antenna with detailed pictures

Dual band J pole operational over the entire 6Mtr band (50 - 54MHz) and the entire 2Mtr band (144 - 148MHz), slightly favouring the upper half of both bands by VK6YSF

A program to decode Morse code via sound input of PDA to text. No additional hardware required - your need only receiver and PDA with sound input. Built-in microphone of device can be used also.

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

Tucson Police and EMS live scanner audio feed on radioreference.com

Icom, Yaesu, Alinco, Cte, Comet, Jrc, Standard, Uniden, Kenwood italian dealer

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

A Moxon rectangle antenna projects for the 6 10 15 17 and 20 meter band but include drawings, plans, statistics and homebrewing statistics.

Designing quagi and yagi antennas on 2 Meters, some preliminary notes by Cebik, W4RNL

How to produce great audio using your SSB rig and outboard equipment. Step by Step instructions.

Broadband active loop antennas for radio amateurs and hobbyists

The Ohio/Penn DX Bulletin is freely distributed on the Internet and packet clusters around the world, by Tedd Mirgliotta, KB8NW. Published almost on weehly basis the OPDX is one of the oldest DX news list on the internet.

A Primer for the new Packet Radio operator

A High Efficiency Extended Length Mobile Antenna The antenna itself is 3.42 meters or 11 feet 2 inches long from the top of the mounting spring to the tip.

Fatpigdog's Real Time FFT Audio Spectrum Analyzer. User interface has the look and Feel of an HP Spectrum Analyzer. But, in addition to the regular Spectrum Plot, it also produces detailed Waterfall plots. The user can optimize the color map, chosing from a wide assortment of color themes. This analyzer supports multiple traces, trace arithmetic and normalization.

A Center-Fed Half-Wave Dipole is probably the simplest of antennas to construct and use. It is usually suspended between two supports, from it's end insulators, and has the feedline hanging from the center.

A new method of feeding a dipole with toroids.

Harger Lightning Protection is a full line supplier of lightning protection and grounding equipment, servicing the lightning protection, communications and electrical industries.

Live scanner feed and police and fire feeds

A really simple receiving antenna for 80 and 160 meter dxing by WA2WVL

An interesting rotator interface that interfaces a pc to a rotor or rotator controller, emulating a Yaesu GS-232A/B and Easycom protocols, made with Arduino