pwm power supply

Build An LF Antenna Analyzer - A Portable Low Frequency Antenna Analyzer, For those of us who like to play with antennas on the ham bands, one of the handiest tools to have around the shack is an "antenna analyzer". These gadgets combine a signal generator and standing-wave ratio (SWR) sensor in a small battery-powered unit.

W8ZR High-Power Antenna Tuner - This homebrew legal-limit antenna tuner is based on the famous "Ultimate Transmatch" introduced by the late Lew McCoy, W1ICP. The Ultimate Transmatch was described in the "Beginner and Novice" section of the July 1970 QST (Page 24).

G7 Comms Ltd - Supply, hire and service PMR & PBR equipment & Accessories - o­nline shop, order via Phone or Web. Next Day delivery. Supply Entel, Icom, Kenwood, Maxon, Motorola, Tait, TTI, Vertex Standard.

Energy line 2000 - Solar power, biodiesel fuels, wind energy, streaming video, articles, news, and more. Renewable Energy and Emergency Communications by Terry McGleish

WA5ICA web log - The Internet Home of Amateur Radio Station WA5ICA Adventures with low power and a lower budget

Maha / Powerex - Portable electronics, amateur radio, pro audio and digital cameras batteries, chargers and conditioners.

Electronika Int. - Electronika manufacturers Coaxial Cable Assembly, RF Connectors, Adapters, Power Dividers, Couplers, Crimping Tools

SAT-Service Schneider - Digital radio mondiale DRM products, measuring tools, Magnetic field probes, RF power meters, Broadband loop antennas, DRM devices and services

A & A Engineering - Smart Battery Chargers, WeatherFAX, Color SSTV,GPS-Based Frequency Standard, Power/SWR Meter, , Digital Frequency Synthesizers

MicroSignals - MicroSignals produces a line of RF and IF signal processing components that offer high performance at an exceptional value. To achieve this MicroSignals began with an engineering team that possessed an excellent background in RF Transformer and Balun design.

CPI Eimac Internet - Innovators in Power Tube Technology

Alpha Linear Amplifiers  ^pop - RF Concepts manufacturer of Alpha Linear Amplifiers, amateur radio RF power amplifiers, commercial power amplifiers, power meters and dummy loads.

W8WWV Icom 706MKIIG simple accessories - Acc1 Breakout Box, Fused Power Cable with Accessory Tap, Microphone Breakout Box, CI-V Interface, Using the Auto Sound System for Receiver Audio

AARS - kenwood ts-2000 and accessories - Austin Amateur Radio Supply page on Kenwood TS-2000 and all accessories

Icom america - IC-V8000 page - IC-V8000 2M Mobile, power when you need it

Reimesch - Ham radio dealer based in germany offer RF power amplifiers, from Alpin and SPE, antennas, RFI suppression products and GSM GPRS products

Welcome to VIS Amateur Supply - Vis amateur supply, largest independent dealer for several major brands of amateur radio accessories, and publisher of 'vis study cards' and the 'sam amateur radio callsign database'. Coffeeville, AL USA

Fox Delta Amateur Radio Projects & Kits by VU2FD - Amateur Radio Projects & Kits for homebrewers, includes DDS,sound card interface,programmers, hamcom, frequency counter, RF Power Meter, modems and more.

Italtras - Power transformers for electronic, toroidals,three-phases

Alabama radio - Eastern Alabama's dealer of amateur radios and antennas, CB radios and antennas, scanners, radar detectors, power supplies, and other related accessories.

Sierra mods - This is a collection of emails collected over time which indicate how to put some mods into your Sierra transceiver. Most of the mods have to do with improving the power output.

W4ATC QRP Project - Beginners making inexpensive, low-power shortwave transceivers from kits.

QRP 12V Power Pack - A perfect companion for your Elecraft K1 or any other (not power hungry...) QRP rig

Wave report BPL tutorial - Broadband Power Line Tutorial by James Stenger

Broadband over power lines - Compatibility and BPL RF Interference