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ZL SPECIALE for 10 M - A drawn of a ZL Special antenna for the 10 meter band or 28 Mhz

Beverage transformer notes - Notes on beverage transformers collected by N1EU

VA3GRR - Radio Beacon - VA3GRR is a radio beacon, operating on the 10 meter amateur band. Its frequency is 28.205.5 MHz. It runs just under 5 watts of power into a vertical half-wave ringo style antenna

Sunelco - Solar and wind energy products, Water Pumping, Hydro power solution, chargers inverters, batteries, Hydrogen Fuel Cells

Lunar Link Systems - VHF UHF Power amplifiers and accessories

BG Micro - All kind of electronic components, Hobby Electronics and Parts, motors, Sun power solar panels, switches, rechargeable batteries, RF Coils, Coils and Chokes

FMI - FMI provides superior solutions in the design and manufacture of frequency control devices including Voltage Controlled Temperature Compensated Crystal Oscillators (VCTCXO), voltage controlled crystal oscillator (VCXO), Temperature Compensated Crystal Oscillators (TCXO), crystal clock oscillators, high temperature oscillators, surface mount and crystal oscillator products, phase locked sources and more.

Astrodyne - Dedicated to the design, manufacturing, technical support, and delivery of innovative and cost effective power solutions for worldwide applications. AC/DC switching power supplies and DC/DC converters.

KD1JV Designs - QRP Kits and Projects for the low power Amateur Radio enthusiast

Mid-Latitude Sporadic-E (Es) - This article was originally written in response to a brief review of the basics of sporadic-E

The KA7OEI FT-817 pages - FT-817 Radio Modifications, Improving the FT-817 Noise Blanker, increasing output power, using rechargeable cells, epanding frequency range

Solar Panel Store - Focus on solar power products that function in the harshest environments, designed for years of reliable service.

AEE Solar - Wholesale distributor of alternative power products, solar panels

Alliance Test Equipment - Alliance Test buys and sells used network analyzers, spectrum analyzers, function generators, mulitmeters, probes, optical power meters, calibrators, attenuators, testers, and more from Tektronix, Fluke, Rhode & Schwarz, Advantest, LeCroy, Fujikura, California Instruments, NetTest, Keithley, Actrena / TCC, Instek

Enable Low Cost RF Power Amplifiers - A new paradigm for low cost, reliable RF amplifier ‘pallets’ has been enabled by new circuit design, manufacturing and thermal management techniques

Microwave RF Amplifier Design Tutorial - This tutorial will set out the design stages required to design a theoretical microwave amplifier

Highly linear rf power amplifier design - The need of high linearity is one of the principal drivers in the design of power amplifiers for new generation applications

Desgin Power amplifiers with Genesys - Article on how use Genesys sowftware to design RF power amplifiers

Power Aamps RF voltages - This test circuit is easy to duplicate, and demonstrates the extreme voltages that appear in an amplifier when the load is improper for the amount of drive power applied.

Power Gride Tubes - Article on tubes and their usage in power amplifiers design. Explain failures of tube in RF power amplifiers, a common problem in the SB-220 SB-221, TL-922 and other amplifiers.

144 MHz PA with MRF317 - A 2 meter power amplifier

Remote antenna switch - A remote antenna change-over switching using relay powered over the coaxial feeder

Antenna Coupler - Schematics of antenna couplers in french

What's a diplexer? - It's a network that splits a signal to two or more loads, dependent on frequency. It is the simplest form of a multiplexer, which can split a signal into many different signal bands.

Tools and Links for RF Power Amplifier Builders - This document lists a few tools, documents and websites which are valuable in the design and construction of amateur RF power amplifiers. The list is small but it represents a good starting point for the amateur amplifier builder.