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How to make a half l or quarter l coax cable for a specific frequency

Key your transmitter from the tone output of a Morse Code generator program

Manufacturer of led digital clocks, digital timers, countdown clocks, electronic kits, audio switches, binary clock, telegraph keys, and cool gadgets.

Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

Website for Amateur Radio Companion reference CD-ROM.

Reference guide for amateur radio equipment. View, compare and share ham equipment specifications and personal experiences.

SDL is a dedicated contest logger for SWLs. It's good for all the major international contests and for dozens of others worldwide. SDL is fully working and unrestricted, and is distributed as freeware. It links to Icom, Kenwood and Yaesu radios to follow band and mode changes.

A 70cm and 2m 6 elements yagi antenna plan based on the IEEE Transactions on Antennas and Propagation

Audio setting and improvements for Yaesu FT-2000 by k6jrf

A 2-metre Quad antenna project by K6WXA in PDF file

An 80 meter band vertical loop antenna setup

Analyzing FCC amateur radio license issuance data, this resource presents monthly graphs and raw numerical statistics detailing the number of new and upgraded amateur radio licenses. The primary focus is on the impact of the Element 1 Morse Code test removal on HF privileges, specifically observing the transition rates from _Technician_ to _General_ and _Extra_ class licenses. Data is sourced from _QRZ Archives_ and processed using a custom Perl script to tally "Issued" licenses each month. The presented data, available in graphical, tabular, and raw XML formats, clearly illustrates the "spike" in General class upgrades following the rule change. It also highlights a consistent rise in new Technician licenses observed in March of both 2006 and 2007. While the dataset currently extends back to January 2006, providing a limited statistical snapshot for long-term Technician trends, it effectively captures the immediate climb in General class licenses.

NUE-PSK Digital Modem A digital modem for PSK31 field operation, without using a PC

Iphone app for ncdxf IARU beacon monitoring, shows the currently transmitting beacon on each band, reception charts from the active monitoring stations, and latest solar flux A and K indices

A PDF presentation about Amateur Radio and Linux by By: Dave Mamanakis. A beginners guide to Linux for radio amateurs, this presentation cover basic concepts of the open source operative system, from the basic installation to the setup of ham radio programs.

The Folded Dipole is not used much amongst Radio amateurs, probably due to the fact that this antenna uses twice as much wire as a single-wire dipole.

Arduino Band decoder project available in KIT

Laws, rules and regulation on scanning expecially in the usa

This is the Loop Antenna Group to Ask Your Questions, Get Answers and Information about Loop Antennas for improved your Radio Listening and Enjoyment.

FT-847 Specifications

Chuck Dachis author of radios by hallicrafters. common/unusual Hallicrafters, wanted, FAQ, links, and other treasures

Here you will find all kinds of information, PCB layouts, hints and kinks and case histories of some of the most popular Heathkit ham gear.

2 Meter Indoor Slim Jim Antennas for Cyclone Season and Other Uses by VK4MDX

This antenna analyzer measures complex impedance over the 1.6 - 33 MHz HF spectrum

Your source for weather radios, communication headsets, 14 channel radios, M&M groovy radios, smithsonian crystal radio and weather station kits, line restrictors, antennas,ham radio accessories, and battery products.

Controlling amateur radio transceivers remotely often requires dedicated software to interface with the radio's CAT (Computer Aided Transceiver) system. CATSPAW is a software utility specifically developed by N2OHZ for the Yaesu FT-100, facilitating computer-based control over various radio functions. The software provides an interface for adjusting parameters such as frequency, mode, and other operational settings, which can be particularly useful for remote station operation or automated tasks. While the specific features and user interface details are not extensively documented on the download page, the primary function centers on providing a digital control layer for the _FT-100_. This allows operators to integrate the transceiver into a larger station setup that might include logging programs or digital mode applications, enhancing the overall operational flexibility. The utility's design focuses on direct control, leveraging the radio's internal command set. As a downloadable executable, _CATSPAW_ represents a common approach to radio control software from its era, offering a direct link between a personal computer and a specific transceiver model.

GJTracker is a antenna tracking program for windows written to be compatible with WSJT

A High-End UHF Preamp for the VHF/UHF Dongle

A homebrew Magmount for 2m antenna

Comparison of performance between an indoor random wire versus a magnetic loop using psk31

A Slinky-based doublet or loaded vertical QRP antenna tested for 40 meters band

A Windows based Spectral Analysis/Receiver Program primarily used with the SDR-IQ, SDR-14 , SDR-IP, RF capturing hardwares

Part 2 You're now much closer to saying goodbye to your unwanted signal problems!

Authorized ham radio store for Alinco Vibroplex Pryme MFJ Enterprises Mirage Amps Ameritron Vectronics DCI Yaesu Comet Antenna

Alk engineering - filter design software and consulting

A compact antenna for 160 meters, suitable for hams tha want operate top band buh have a limited space

Yaesu VX-2R mini review in spanish. Watch a VX-2 in action video by YouTube

Understanding and solving RF interference problems using ferrite

A complete guide to Baluns and transformers by WK5AJL

This page documents how KR7RK built a Go-Box portable amateur radio station

A rotator modification by W4ZT

The Kenwood TS-2000 All-Mode Multiband Transceiver review

1000 feet of open wire line

DX Cluster, classified, files and much more.

The YB7ZGP Pamaton Repeater operates on a frequency of 146.76 MHz, serving the Martapura District in Banjar, South Kalimantan, Indonesia. This VHF repeater provides local communication infrastructure for amateur radio operators in the region. The repeater's operation is managed by Syah Riyan, indicating a local amateur radio enthusiast or group maintains the station. Repeaters like YB7ZGP are critical for extending the range of VHF/UHF communications, allowing handheld and mobile transceivers to communicate over greater distances than line-of-sight. The 146.76 MHz frequency falls within the 2-meter band, a popular segment for local and regional amateur radio traffic, often utilized for emergency communications and general ragchewing. Information regarding the _Pamaton Repeater_ is presented on a blog platform, suggesting a community-driven effort to disseminate details about this local amateur radio asset.

RF shop is an Australia online retailer of Radio Communications, Electronics, RF and Microwave component products.

Provider of point-to-point microwave radio system sales, service, and integration, employing refurbished name brand digital (DS1/E1, DS3/E3) and analog video radios. Specializing in Microwave Associates (M/A-COM) , Digital Microwave Corp. (DMC/Stratex) and Alcatel/Rockwell microwave radios.

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A very basic guide to antennas concept. Explain the usage of dummy load, basic antennas like dipole o j-poles.

Antenna gain directly impacts Effective Radiated Power (ERP) by concentrating RF energy along the horizon, increasing signal strength in specific directions without altering the transmitter's output power. For instance, a 4-watt transmitter coupled with an antenna exhibiting 10 dB of gain achieves an ERP of 40 watts, while 20 dB of gain results in 160 watts ERP. The relationship between antenna gain in decibels (dB) and the watt multiplier is logarithmic, where each 3 dB increase in gain approximately doubles the ERP. The provided table illustrates this principle, showing how a base 4-watt transmit power is transformed into significantly higher ERP values across a range of antenna gains from 1.2 dB to 100 dB. A 1.2 dB gain yields 4.8 watts ERP, whereas a 100 dB gain results in 400 watts ERP. This technical documentation from _Firestik Antenna Company_ clarifies the practical implications of antenna selection on signal propagation.