solar charger constructi

2 Meter Turnstile Antenna - 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

Build a 4:1 Guanella Balun - Step-By-Step Construction of a 4:1 Current-Type Guanella Balun by W1CG

PY8ELO Dipole project - A spanish page about inverted V dipole construction tips and calculations.

This Old Dipole - An antenna construction workshop conducted at Marshall N1FN's QTH

W1GQL's Homebrew Hexbeam - A site dedicated to HexBeam antenna construction. It is complete and you will find all information you need to start homebrewing your own hexbeam antenna.

Magnetic loop antennas - Magnetic Loop Antenna, MagLoop, Small Transmitting loop, construction hints, remote control motors

The WWVB Receiving Antenna - The construction of this antenna is intended to be inexpensive, fast, and effective. Very capable in receiving WWVB from california.

Hombrewing Cubical Quads - Cubical Quad antenna construction notes

Novel Gamma Match Construction - A novel approach to contruction of a gamma match.

Building Coaxial Traps - This page describes the design and construction materials W8WWV used to build a coaxial cable trap. A coaxial cable trap is a parallel resonant circuit that is usually inserted in an antenna element to enable multiband operation.

5 element yagi for 20 Meter band - Picture and construction details of a 5 element 20 meter monobander

DXFun Web Cluster - DX Cluster mainly in spanish, with chat, filtering available upon user registration, propagation reports and solar status, includes also latest dx news.

Geophysical Alert Message wwv.txt - Broadcast via WWV and WWVH at 18 and 45 minutes past the hour. This message is updated every 3 hours. Reports current Solar-terrestrial indinces, Solar Flux, A-index, K-Index, forecast for space weather storms. Prepared by the US Dept. of Commerce, NOAA, Space Environment Center

Report of Solar and Geophysical Activity - The Report and Forecast of Solar and Geophysical Activity is the primary daily report prepared by SEC. It provides a summary and analysis of solar and geomagnetic activity during the previous 24 hours as well as the most recent solar indices. It also provides a forecast of activity and indices for the next 3 days.

D-Region Absorption Prediction - This map represent the current position of the sun and how a solar flare influence an HF fade. Estimated recovery time is also represented. Includes son java and javascript animations of last two hour conditions

Today's Space Weather - SEC - Another interesting reports page with plots and graphs of solar flux. Interesting resources provided here includes, Solar images, a text 3 day solar geophysical forecast, a 3-days Solar X-Ray flux plot updated evety 5 minutes, The Satellite Environment Plot, combines satellite and ground-based data

NOAA Space Weather Scales - The NOAA Space Weather Scales were introduced as a way to communicate to the general public the current and future space weather conditions and their possible effects on people and systems. The scales describe the environmental disturbances for three event types: geomagnetic storms, solar radiation storms, and radio blackouts.

Hourly STD Solar and Geophysical Report - Boulder K-Indices, Planetary K-Indices, 10.7 cm solar radio flux updated every 30 minutes by Canada's Space Weather center

Asia Radio Sales - Online shop based in hong kong offer batteries mic speakers adaptors programming cables earpieces telescopic antennas handheld antennas desktop chargers handheld speakers. Kenwood Icom Yaesu and Alinco dealer

HamTimer - HamTimer was written by WF0GM to provide a way of showing both UTC Time and Local Time simultaneously, Provide a reminder to the Amateur Operator to identify his/her station every 10 minutes as necessary, Sound an alarm for WWV solar activity announcements each hour.

Easy Kilowatt Linear Amplifier  ^pop - Rf amplifier for hf ham radio service - includes easy to understand designs and penny-cheap construction details

Homebrewing a tube-type HF amp. - This article discuss the use and construction of a grounded-grid, triode type HF amplifiers

Making Crimp-On connectors for RG-213 coax cable - The construction process of making crimp-on connectors.

SV1BSX Homebrew Corner - Offer a wide range of homebrewing projects mainly for VHF UHF operations. From vhf antennas to preamplifiers, chargers and power supplies

A Cable Construction Trick - If you have several TNC and radios this trick can be usefull for you