heil sound cable

Feeder Radiation - Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation resulting in power loss and the radiation characteristics changes

A model of the W2DU 1:1 choke balun - Notes on making the W2DU choke balun by placing several ferrite sleeves around a coaxial cable.

Replacing cables and rotator on a tower - N5AR article on maintnenance works on a crank up tower

Traps for 40/80 m dipole - I6DVX article on hoembrewing traps, using vetrnonite instead of common coax cable.

Building traps with coax cable - Tips on how to build a trap using common coaxial cable and coax trap software, by F5JTZ in french

F8JZR Morse keys collection - Telegraphy collection, telegraph, sounder, relay by F8JZR in french

MicroHAMS - Microhams is a dynamic organization of hams in the Puget Sound area. The club includes a broad range of people from our local tech industry who participate in just about every aspect of our hobby.

Yimber's podcast - DX recording for about 20 years old in Popayan, just get a visit there and you are able to hear son interesting DX Sounds, made by Colombia DXer, Yimber Gaviria now living in Cali, Colombia

Digital Operating Modes - Description, frequencies and sound samples of most popular amateur radio digital modes by DG8FBV

RFS - Radio Frequency Systems (Formerly Celwave, Cellwave, Cablewave),Wifi antennas, duplexers.

FT-897 857 817 Cable - Multifunctional interface for Yaesu FT-8x7 Series Transceivers

RadioWare - Products and books for the radio hobbist. Antennas, Coax cables, filters,Lightning Protection, Wire & Cable, Books

Praxtel Telecommunications - Praxtel offers coaxial cable and connectors, as well as fiber optic cable, connectors and other products for telecommunication applications. 50 Ohm Coaxial and Helical cables. 75 Ohm coax cables.

RF Stuff - Online shop for two way radio communications and amateur radio products, antennas, coax and cables, adapters and mounts, accessories and audio parts

Spectrum Analyzer Real-time FFT - Eight-channel Audio Spectrum Analyzer is a set of Real-Time Multi-Channel Gauges for investigation of data accepted from any ADC you will want or 16-, 24- and 32-bit ADC of sound card. WDM drivers support. FFT Spectrum Analysis, OscilloScope, Frequency counter, AC/DC voltmeter, Signal-to-Noise Ratio, Signal-to-Noise and Distortion, Spurious-Free Dynamic Range, Effective Number Of Bits, Total Harmonic Distortion, Inter-Modulation Distortion, Phase Shift. Special modes of dual-channel FFT spectral analysis: Separate channels spectra, Spectra of digital sum, difference, product of two signals, Spectrum of digital product of original signal and its fundamental, Spectrum of Real and Complex Transfer Function, Cross Spectrum. Standart weighing of spectra according IEC and CCIR. Oscilloscope modes (for dual-channel ADC) are: original signals, sum, difference, dependence of one channel on another, amplitude distribution of input signals.

Remote Control of Mast Mounted Equipment - This article presents a method of controlling preamps, antenna switching and polarization switching remotely without the use of control cables.

Coax Cable Antenna Switch, homebrew - KO4NR coax cable antenna switch construction by ve3cgc

Coaxial Cable's specifications - A table with Loss in DB/100m , Max power in Watts, Diameter in mm , Velocity factor (VF)

Loss Calculator - Calculate power loss depending on coax cable you use

Coaxial Cable The neglected link - The purpose of this document is to show the transfer impedance and shielding effectiveness of different types of coaxial cables

Diplexer 2m 70cm - This DIPLEXER separates 2m from 70cm on the same coax cable, and allows to use 2 antennas over the same cable and permits transmission on one band and simultaneous receiption on the other band by hb9abx

Lightning Protection for the Amateur Radio Station - Article on lightning protection for the ham radio station, Lightning Characteristics, Identify What is to be Protected, Establishing a Good Ground, Coax Cable Grounding, Operating Safety by wrblock.

Lightning Protection : Protecting each I/O line - KB22UT Article on how protecting ham radio station and in particular I/O Lines such as AC power, coax cable, control circuits, telephone line.

Sound Card Interfacing for RTTY, PSK31, and SSTV - Using a PC sound card to coonect to your radio.

Sound Card interface - Interface to insulate the radio circuits from the computer by VK2GWK