diy power supply

10 elements 70MHz Low Noise LFA Priority listing - A 10 element 4M LFA Yagi. Flat SWR across the band, easy build with no matching to install. No power limit high gain.

Basic Ham Radio Course - Power Point Presentations by the Toronto Emergency Communications (EmComm) Group represent an aide to train interested volunteers in becoming Amateur Radio Operators.

Cobra Electronics - CB Radios, GPS systems, marine electronics, two way radios, power inverters, speakers, antenna mounts and microphones.

muTek Limited - Manufacturer of RF amplifiers, low noise pre amps, transverters, power supplies

Communication Coil - Communication Coil, Inc. designs and produces custom, high reliability Filter Networks, RF Coils, Chokes, Inductors, Baluns, Toroids and Power Magnetics for communications

Vacuumschmelze - Manufactures inductive components for telecommunications and power electronics applications.

Advanced Battery Systems - Specializes in providing portable power solutions. Custom battery pack assembly is primary function, but also distribute batteries for many battery manufacturers.

Kits and Parts dot Com - Supplying Toroids, Electronic Parts and Kits to Engineers, Schools and Hobbyists. Capacitos, filters, inductors, qrp products

MiniDSP - MiniDSP is a platform for digital audio signal processing applications. Manufacture low cost digital signal processor kits for the DIY/OEM market. Our flexible audio platforms are software controlled and easily upgradeable.

PIC Simulator IDE - Powerful application that supplies PIC developers with user-friendly graphical development environment for Windows with integrated simulator (emulator), Basic compiler, assembler, disassembler and debugge

Alternate Power Sources - Article about alternate power sources, like portable generators, solar panels, batteries and wind turbines

Class C Amplifier Matching - QST Article on what you should know about matching networks for class C RF power amplifiers

Nature of Source of Power in Amplifiers - On the Nature of the Source of Power in Class-B and -C RF A mplifiers by W2DU

5-band RF Power Amplifier - This project uses a widely available IRF510 MOSFET, work on HF 80, 40, 30, 20 and 17 meter bands

WA2EBY Mosfet Amplifier - A Broadtband HF Amplifier Using Low-Cost Power MOSFETs

GS-35B 6 meter amplifier - VHF power amplifier for 50MHz using GS-35B tubes, output 1500 W with 75 W input

2 meters Power Amplifiers - Several 144 MHz Power Amplifier by YT1AR using GI7B GS31B GS35B GU34B

Homebrew 50 Mhz Beacon - DIY beacon for six meters band by K9MU

ICOM IC-E90 Adapter - Adapter power supply for IC-E90 by IW0HEX

Power Supply Page - A good overview article on power supplies by Karl Shoemaker AK2O of the Spokane Repeater Group

Power Supply Analysis - This article explains how a linear power supply works, QST Article

A 40 meter SSB QRP transceiver - This transceiver was conceived as a power-efficient, small, lighweight unit to be carried in the backpack, along with antenna and battery.

QRP AM CW transmitter - A simple low-power broadcast-type circuit, using a crystal oscillator integrated circuit and an a collector modulated AM oscillator

NHRC-2 Based Repeater Controller - NHRC-2 Based Repeater Controller A perfect controller for a simple repeater or link, or portable/solar powered system.

Digital power meter - A simple digital power meter by Dave Roberts, G8KBB