alternative power

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.

HF Antenna Coupling Techniques - Look at some of the various ways in which power can be delivered from a transmitter to a radiating system

Military Portable Auxiliary Power Units - Design, build and supply Military Diesel Operated Tactical generator sets, diesel generator sets, custom generators, auxiliary power units, portable power generators and tactical quiet generators used by the U.S. Navy and Air Force.

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

1296 by KB2AH - Specialized 1296 Mhz Equipment, Circular Feeds, LNA, power amplifiers, Antenna systems, Test equipments, antenna mounting blocks

30 Meters receiver - A simple 30 meters receiver for low power QRSS Beacons and PSK31

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

PExprt - Tool for magnetic component design and modeling. Design and modeling of magnetic components such as inductors, planar transformers and integrated magnetics used in power-electronics applications.

80-10m Linear Amplifier - High-power 3-500 HF linear amplifier by Don Pinnock G3HVA

10 11 meters RF Power Amplifier - AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)

6M QRO - 500 W RF Power Amplifier for 50 MHz by KB0NLY

High power amplifiers by pass relays  ^updated - These relays are only to be used for output power who exceeds conventional antenna relays specifications.

Capacitor kVAr calculator - Online calculator to determine the Capacitor kVAr required to improve the power factor from cos 01 to cos 02 with your present kW load

QRP Power Meter and Dummy Load - In this article the schematic is of AA5TB QRP power meter and dummy (50 Ohm) load combination

Return Loss, SWR, Power Gain and Loss Calculator - A neat tool for your daily ham activities around the shack

CMOS Super Keyer - Home made keyer with 8 memories, auto spacing, adjustable speed & weighting, separate paddle and key inputs, beacon mode, positive or negative keying, fuse, extremely low power requirements, and a bullet proof housing by AA5TB

RF Power Meter - RF Power Meter using for reading a standard Digital Voltmeter by Iulian Rosu, YO3DAC / VA3IUL

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

4AMP 18v power supply - Schematic of a 4 AMP / 18v regulated power supply by ON6MU

40 Meter QRP Transmitter - A simple 40 meter CW transmitter, it sports full break-in operation and 250 mW of output power.

The Rock-Mite CW Kit - The Rock-Mite is a 40m CW kit offered by Small Wonder Labs . It features built-in keyer, direct conversion receiver with a crystal RF bandpass filter, 500 milliwatts of power, and switchable frequency offsets to work around QRM

Kenwood varaible power adjustment - Kenwood / Trio transceivers varaible power adjustment by G4VPM

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

AC power meter - Measure the AC current flowing through your appliances