cell phones

4 element yagi for 24MHz Priority listing - Optimised with the very latest PSO (particle Swarm Optimisation) techniques. Perfect flat SWR and excellent performance throughout the band and easy to self-build.

7elements 21MHz OWA Yagi - An Excellent 15M compact 7el OWA Yagi for the 21MHz band. SWR remains below 1.1:1 from 21-21.45MHz. Tapered elements in Metric and USA sizes

6 elements OWA Yagi for 21 MHz Priority listing - Optimised with the very latest Particle Swarm Optimisation techniques, a superb 15M OWA Yagi with excellent all-round performance.

7 elements OWA Yagi for 20 meters band - Optimised Wideband Array with low SWR across the whole of 20m with excellent gain and F/B. European and USA sizes

Inside view of a Magnetic Loop Balun - Inside view of the RF Systems magnetic longwire Bbalun

4 element LFA Yagi for 28MHz Priority listing - The lastest PSO (Particle Swarm Optimisation) techniques where used to produce this fantastic 10m antenna. Excellent performance from a short boom. USA/UK and European tube sizes.

Noantri Mobile Cluster - Reduces size, web dx cluster for mobile phones, or pda, allow WWV a and search facilities

YV5AJ DX Cluster - DX Cluster optimized for palm devices and other mobile phones

Scouting New Zealand JOTA - JOTA provides an excellent opportunity to meet Scouts and Guides from many countries and other parts of New Zealand.

PeakSolar.com - Solar Panels, Grid Tie Systems, Solar Power Kits, Solar Cells and more.

Benelec - Radio Communication Base Station, Marine, Cellular and Mobile antennas covering all bands between 2-6000MHz, Communication Accessories, Coaxial Cable, Coaxial Connectors and Accessories

NP Technologies Inc - Design, develop, test and manufacture a wide range of Amplifier products including highly linear class A Broad Band, Cell Band, Pulse, AM & FM broadcast and Military VHF

SSB Electronic - RF Cable, Connectors, Adaptors, Ecoflex, Aircell, Aircom Cable

DX Cluster for Android Priority listing - DX Cluster is an DX Cluster client for Android smartphones DX Cluster supports: Real time DX spots, Different band and mode filters, A country filter for spotter or the spots, Prefix or call sign alarms

JBOT QRP Linear Amplifier - An SSB linear amplifier made from Just a Bunch of Transistors

How to select a tube HF amplifier - Excellent article and guide to choose the best RF power amplifier that fit your needs by ON4SKY

Yaesu DSP Settings for Heil Microphones - To achieve maximum audio quality it is important to adjust the DSP settings of your transmitter when using Heil microphones.

Bose Headphone Mod - Adding a boom mike to Bose Quiet Comfort (QC-1) noise-cancelling headphones

Heil Microphones DSP Settings - How adjust DSP settings for your trasmitter when using Heil Sound microphones

Recovering old NICAD and NMHI Cells - Old Nicads batteries and sometimes NMHI batteries usually end up with several cells being short circuit, as they suffer from crystal growth in the electrolyte

Eneloop batteries for QRP - Sanyo Eneloop rechargeable AA batteries. For QRP purposes, these batteries are great as a 10-cell pack

Home made Artificial Ground - This Artificial Ground has been designed by Colyn Baillie-Searle GD4EIRP

Home Build a CT-69 Microphone adapter - This adapter allows the use of 8 Pin round Yaesu microphones on some Yaesu radios with the 6P6C modular socket by MW0GKX

A Homemade Signal Generator - Homebrewing a 3 to 30 Mhz Signal Generator, project and schematic diagram

A Simple Receiver - the DC40 - A beginner's direct conversion receiver