Search results

A freeware apple Macintosh-based program that helps amateur radio contesters by converting a log from a radio contest into the Cabrillo file format which may be submitted to the contest sponsor.

An end-fed halfwave antenna for 20 meters band with balun pictures and description by PD7MAA

How to build the Quickie Pneumatic Antenna Launcher

A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cables. Many hams connect the center conductor of the coaxial cable to one side of the dipole, and the shield to the other. Wrong!

The circuit is based on two AD8307 log amplifiers, which are connected to the forward and reflected ports on a directional coupler

EA4EOZ home made baluns

DIY kits a 70W SSB linear Power Amplifier for YAESU FT-817 KX3 running HF 80m-10m bands

A project for a home made 5 element yagi-uda antenna for 2 meters, covering 144-148 MHz band by N1BMX

Building a cavity resonator for 144 MHz

3 Element reversable quad antenna for 40 meters band

CB Radio and 10 meter Radio reviews & mods blog. Most articles are in Japanese

QRP DIY and more

Homebrew G5RV a simple multiband antenna. This article shows detailed pictures of a G5RV home made antenna, including antenna size and dimensions by 9M2ZAK

HF power amplifier project powered by GU-78B by SV8JE

67 ft antenna for portable operation by VE3CLQ

A UHF antenna for satellite reception. Anntenna mast is in wood, made with two aluminium rods

Causes and advices on malfunctioning display in the control head of the FT-857, where several scan lines in the dot-matrix display cease to function, so the display seems streaked at places

The HB9CV is a well known two element antenna of a directional beam type with a forward gain of 4 to 5 dBd. This one is for two metres but it can be scaled, from the dimensions in the diagram, for other bands I have also made them for four and six metres

RTL-SDR is a very cheap software defined radio that uses a DVB-T TV tuner dongle based on the RTL2832U chipset. This is a blog about rtl-sdr, software defined radio and their developments and applications.

HB9DNU Karlheinz's blog, hosted on Blogger, presents a collection of personal reflections and observations, predominantly in German. The content spans various non-amateur radio subjects, including Swiss political initiatives, economic discussions concerning banks like UBS, and social commentary. For instance, an entry from February 2008 details the Swiss vote on a combat jet noise initiative, highlighting the debate between tourism concerns and national security. Another post from October 2008 critiques the 500 billion Euro bailout package for banks, calculating its per-capita cost for German citizens and referencing earlier blog entries from March 2006 and June 2007 that discussed UBS salaries and Raiffeisenbank issues. These entries often reflect Karlheinz's personal perspective on current events. The blog also includes lighter, more personal notes, such as a February 2009 entry about a video produced by his grandson, and observations on local events like a bird exhibition in Contone or a scenic train ride through the Centovalli, demonstrating a broad range of interests beyond the ham radio hobby.

ST2NH blog - first ham blog from africa fatures QRP,Homebrew,news,links

Online log for VK9XX 2009 DXPedtion to Christmas Island

Building an Open Source Arduino APRS Tracker with LCD & GPS ( SVTrackR )

A podcast devoted to long-distance radio reception on the AM broadcast band. AM, or Medium Wave (MW), signals can travel thousands of miles.

2M Yagi made from Measuing Tape by NT1K

The XR0Y Online Log, at clublog. Easter Island DX pedition 2009 XR0Y

EWE Antenna plan with a 9:1 balun

Many NDB radio enthusiasts publish their reception logs on the web. A completely separate system designed for individual listeners to make their own logs and obtain statistics on NDBs, DGPS and now Navtex Stations they have received. Log listings can be exported in a multitude of formats and then emailed to the NDB List

This max size magnetic loop antenna for 14 MHz with a totall circumference of 6m is designed to attach to a wall

Notes on W3EDP Antenna by M1KTA

Antenna experiment a Delta loop antenna for 7 Mhz band

Standard time zone map of the world in a jpeg file

A homebrew Magmount for 2m antenna

Multi-band loft-mounted dipoles for 40, 20, 17, 15, and 10m

Pneumatic Antenna Launchers for sale

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.

A blog with loggings and information relating to shortwave pirate radio in Europe.

How resolve low power problems on Icom IC-7000

ZY0T Online Log - Trindade Island DXpedition 2009

A 40/80 inverted L antenna project by Myron WVØH

A loop antenna made with common RG-213 coax and rests on a cross made of 6 mm fibreglass rods anf a 6.5- 30MHz tune

A vertical antenna for 40 meters band by PA5MW

Homebrew a 2 meter square dipole antenna

Italian page about a home made a 1 to 40 balun with pictures and measurements on HF bands.

Demonstrates the construction of a 144 MHz turnstile antenna, detailing its design for omnidirectional, horizontally polarized VHF operation. The resource outlines the physical dimensions and materials required, including specific lengths for the radiating elements and the use of _RG-58_ coaxial cable for phasing. It covers the assembly process, emphasizing the critical spacing and connection points to achieve the desired radiation pattern and impedance matching for the _2-meter band_. The article presents measured _SWR_ performance across the 144-146 MHz segment, showing a low SWR of 1.2:1 at 144.5 MHz, which is suitable for general VHF use. It compares the turnstile's performance to a 9-element Yagi, noting the turnstile's advantage in providing consistent signal strength from all directions without requiring a rotator. Practical application for local FM simplex and repeater operations is implied, offering a simple yet effective antenna solution for fixed or portable stations.

Cobalt Pet is a weblog focusing on shortwave radio. It features shortwave reception reports, product reviews, photos, listening tips, and links. International broadcasters and amateur / ham radio operators are monitored and discussed.

QRP and other projects from Honolulu, HI

Ham Radio Kits, including HF QRP SSB transceivers by EA3GCY

G0KYA Moxon antenna for 2 meters band

A homebrewed antenna for 2m handheld radios by TB1BIG