common mode

Aerialacts - MaxiMoxon is aerialacts trade name for its line of compact, monoband, two-element, uni-directional parasitic beam antenna arrays utilizing Yagi-style aluminum elements. MaxiMoxon models are available for the 20, 17, 15, 12 and 10 meter amateur radio bands.

EH antenna power lost considerations - Out of Balance Current or Longitudinal Mode Current in the Coaxial Cable causes radiation from the coax. But how large a proportion of the total power is radiated or lost from this Current?

EH antennas and CFA antenna - Many antennas function because of common mode currents, rather than working in spite of them. Two popular examples are CFA and EH antennas. Another recent example, appearing in Antennex's compact antenna articles, is a thick stub "vertical" with no counterpoise.

G5RV multi-band antenna - Multi-band centre-fed antenna capable of very efficient operation on all HF bands, specifically designed with dimensions which allow it to be installed in gardens and other open spaces which accommodate a reasonably-straight run of 31.1m (102 ft) for the flat-top standard model.

G5RV at TowerTalk - Some common questions and a full thread on G5RV antenna.

Helical Antenna Calculator - This is my simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

K8CIT loop antenna - An uncommon magnetic loo antenna by Art Heft K8CIT

Moxon equation - Designing moxon rectangles by equation and by model L. B. Cebik, W4RNL

Moxon Rectangle Calculator - Program to calculate the dimentions of a Moxon Rectangle. All equations correlated to NEC antenna modeling software for wire diameters from 1e-5 to 1e-2 wavelengths.

Hallicrafter Collector - Chuck Dachis author of radios by hallicrafters. common/unusual Hallicrafters, wanted, FAQ, links, and other treasures

Grundig Satellit - This site has listings of all grundig satellit models. You can find pictures,specs,used prices,modifications,upgrades,etc.

AR88 page - This model was introduced in the early 40's to replace or augment the HRO in applications demanding a more onerous duty than basic operational point-to-point communications such as intercepting coded axis radio messages during WWII.

BB&B Technical Amateur Repairs - Amateur Radio Repair resource since 1982. We repair all makes and models of Amateur Radio equipment, vintage to late-model

Communications Specialists Inc. - Manufacturers quality tone signaling, wildlife telemetry,avionics equipment,video transmision modems.

EZMaster by HamRadioSolutions - EZMASTER the all mode all in one interface. USB/Parallel/Serial Device. Include 75 sec Digital Voice Keyer, K1EL Winkey CW Keyer, SO2R switching, two radio interface, two RTTY audio insulated ports, two flexible Antenna Switch control. Ideal for Contesting, SO1R, SO2R, field day and daily activity. Compatibile with all software on the market : CT, CTWIN, TR, NA, WriteLog, N1MM, WinTest, MMTTY, MIXW and more .

Split Operations - When and How - An interesting guide on operating in split mode

About AMTOR - Amtor an overview, summary or tutorial about the basics of AmTOR

Weak Signal VHF by Tim Marek - K7XC - A complete guide to operating the weak signal modes on VHF/UHF/Microwaves. VHF Contesting honor role for the western states, rover, eme basics and vhf contesting.

KI8DU's CW Nets - Tips on cw operating mode

Mixed-Mode Operation on Voice Repeaters - Mixed-mode operation, where voice and digital transmissions are used in turn on the same frequency

Nec2Go - Powerful antenna modeling tool using NEC 2 computing engine. Nec2 specifically provide users, either those experienced with the Nec2 processes, or for those who are neophytes but want to model their own antennas. Nec2Go uses a simplified process for defining the antenna structure and then providing view of the structure, plots (2D and 3D) and other significant data that is pertinent to the design. This simplified process uses an edit file with equations for all definitions.

Scancorder - With Scancorder you can record and replay audio from your scanner using your computer soundcard. The audio is recorded digitally as a wave file, so that even digital modes can be re-processed or analysed later.

AFU Knoppix - The AFU Knoppix CD contains software for the operating modes of PSK31, RTTY, SSTV, FAX, APRS and packet radio. Additional applications for Sat tracking, logging, locator referencing and antenna computation are also included. The CD is targeted for radio enthusiasts, the Linux operating system and the applications on this CD are structured so that they can run from the CD without effecting the installed existing system software. *

SV2AGW Packet Engine Professional - This is a brand new program based on the well Known "AGW Packet Engine/ AGWPE". It is a special Windows utility for amateur radio packet users that interfaces multiple packet programs and multiple TNCs (Terminal Node Controllers) / modems: lets one TNC be used by more than one packet program, lets one packet program use more than one TNC, lets your sound card be used as a physical TNC or modem, no need to buy a TNC , has an optional 'TCP/IP Over Radio' feature that lets you send TCP/IP data sentences via packet to internet gateways

Icom 706MKIIG mod of internal fan on rx - Unlike the old Icom 706, the 706 MKIIG HF/VHF/UHF multi-mode ham radio transceiver do not keep its internal blower running all the time in receive mode.