rf amplifier design

50 MHz Antennas by DF9CY (4 & 6 Element)  ^pop - Two well performing 50 MHz antennas designed with W7EL EZNEC along to many other antenna projects and related articles

Reflected W Beam - Hexagonal Wire Beams for 40-10m from DL7IO, different mono/multiband designs with building descriptions and model files for EZNEC

Romeo Fox Dx Group USA - Membership Info no cost to join

OH2GI Ham System - All-mode contesting and logging software system designed primarily for on-line operation of HF digital and CW radio stations through Terminal Node Controllers (TNC)

Pacific IOTA Numbers - IOTA Designation for The Hawaiian Islands

IOTA EU-110 Log St Nikola Isl - 9A/I2OGV, 9A/I2RFJ, 9A/I2ZBX, 9A/IZ2LSC 2010 dx pedition online log

HF Hamtrader Nes - Trader net frequencies

The Amateur Radio Flea Market - Treffpunkt Amateurfunk (German)

PD2RFU Jeroen - PD2RFU by Jeroen GoedĖl Fox United, Formula 1, Motors, links and all about ham radio

Matt's Media Network - 5 Webcams, SWL info, Top 100 shortwave sites, Webcam Mania Top 100, Matt's Banner Exchange.

QRO Technologies - HF amplifiers manufacturer

California Amplifier - manufacturer of solutions for worldwide wireless broadband communications

DaveMade  ^pop - 25-30 MHz base and mobile amplifiers

ACOM  ^pop - ACOM international, manufacturer of HF power amplifiers, HF Antennas, Antenna tuners, Switches and Crankup masts

Signal Engineering - Signal Engineering technologically advanced antennas with modern design and construction technique. Up to date information about current line of high performance 10 and 11 meters antennas.

Zetagi  ^pop - Zetagi amplifiers, accessories, power supplies, microphones, SWR and power meters, battery charges

Vectronics - Antennas, Filters, accessories, wattmeters, tuners and amplifiers.

Current Aurora status - The Aurora in near real-time from Sweden

The Sunspot Cycle - Sunspot Numbers, The Butterfly Diagram, the Greenwich sunspot data and sunspot realted infos.

National Weather Service - Some little known facts about the NOAA Weather Radio system

Radioman - Freeware dos VHF/UHF Logbook morse code facility, kenwood transceivers interface, moontracking, distance and bearing calculators by DF9CY but discontinued and unsupported

AREPS propagation programs - Collection of various propagation software by Space and Naval Warfare Systems Center, San Diego, Atmospheric Propagation Branch

RF prop  ^pop - RF propagation software

TH-D7 control program - This software allows you to control TH-D7 radio functions in real time, using a windows interface. This software will graph current activity of any 4mhz range, allowing the user to mouse click any active portion - automatically changing the radios frequency.

QRP Amplifier - HF Bands QRP linear amplifier by SM0VPO