common mode

160-meters antenna problems and solutions - Bill Orr W6SAI ham radio techniques. Improving ground connection, computer analysis of the antenna, modelling sample antennas pdf file

Eliminating TX RF Feedback Problems - Malfunction of transceivers due to stray RF pickup is a common problem, especially when using end-fed antennas, high-impedance feedlines, or a poor ground counterpoise

A remote antenna tuner - Interesting project to remotely control, using a servo control circuit, a common commercial antenna tuner by N30X

Putting a Balun and a Tuner Together - Two wire transmission line as a three terminal Device , The W2DU and W7EL models of a choke balun, The effectiveness of a balun. Article by Kevin Schmidt, W9CF

Common vhf amateur radio antennas - Plans and drawings of common amateur radio antennas, like jpoles, copper cactus, super jpole, omnidirectionals and quads

The FD4 (FD3) Windom Antenna  ^pop - The 4-band Fritzel model FD4 is a special version of a Windom antenna. It is a half-wave long on the lowest frequency, and is fed from a coax cable through a transformer inserted in the wire at one-third from one end

Australian Vintage Radio - How old is my valve Radio? this website host a reference of model numbers and year of manufacture for many antique radios

Chuck's Antique Radio Site - Specializing in Zenith Console and Table model Radios of the 30's and 40's

Digital modes sounds - Ever wonder what all those funny sounds are that you come across from time to time on the ham bands

RFSM-2400 Digital Mode - A recent digital radio protocol. Based on a freeware soundcard-based Radio Frequency Software Modem. Work under standart MIL-STD-188-110A. Maximum speed 2400 bit/second. Signal bandwidth: 0,3-3,3 kHz (standard mode) and 0,3-2,7 kHz (non-standard mode).

Extreme narrowband modes: QRSS - ON7YD narrowbands modes on 136 Khz

G7IZU QRSS information - An excellent guide to QRSS mode

IW0HK - Ham Station in QRSS mode - QRSS pictures and examples from IW0HK ex IW1CXZ

WB3ANQ Web Site - Operational mode QRPp QRSS Running as an MEPT Manned Experimental Propagation Transmitter

Work satellite with single IC-706MKIIG - You wanna try to work modern satellite like AO-40 but have only one rig ICOM-706MKIIG ? This article will help you.

TS-850 mods - my mods.dk

Ham Repair - Ham Radio repair of all major brands and models, located in Carrollton, Texas, which is just north of Dallas, and have been serving the Amateur Radio community for over 20 years.

Contest Log Converter - Contest Log Converter it's a Windows program that allow to convert data file between the most used Contest Log. The program allow you to convert 12 different type of contest, selected from the common contest managed from the Contest Log program. The follow program ,CT by K1EA, TR by N6TR and NA by K8CC are full supported with the conversion of the most famous world contests.

Meet Jason - Jason is a keyboard mode displaying the received message as text. Expecially indicated for LF operations

PSK08 - G4JNT - PSK08 Software for the 56002EVM. PSK08 is a data communications mode identical in operation to PSK31, but operating at one quarter the speed, ie. approximately 8 symbols per second.

Radio Control Program ARCP-480 - This free software is an application solely for the use of controlling the Kenwood TS-480. Can be used to edit, save, and export to the TS-480 information such as Memory, Menu, and Auto Mode frequencies.

HugeIcom - This is a very simple program which helps visually handicapped people to see the frequency and mode of the rig. Or maybe it's useful for demos, trade shows or similiar. It will work with any Icom except the IC-735.

Virtual Legacy Radio - Windows remote control for Yaesu or Icom. Displays the current transceiver settings frequency, mode, and others on the PC in an old-fashioned way that corresponds to the look of receivers in 70's. DX-Cluster Watch (DCW) is an application that automatically refreshes a web page with the dx-cluster content, parses spot lines from it, keeps a consolidated list and inserts the spots to VLR as frequency markers by OK1FIG

Idiot's guide to coaxial cable  ^pop - A very beginner's guide to coax cables. Characteristics, detailed comparison of typical coaxial cables, commonly used connectors, and a few words about SWR.

A low cost dummy load - This article describes a low-cost, low-to-moderate power dummy load, which presents a 50-Ohm resistive load from HF through 440MHz.