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140 links

An 80 m dipole antenna for restricted spaces - LA8OKA
You can bend the wires in a half wave dipole so that it takes up ...

[ Hits: 186 | Votes: 0 | Rating: 0 ]

HF Receive Antenna - K0EMT
This page describes a couple of parts box medicine bottle antennas that you can build ...

[ Hits: 193 | Votes: 2 | Rating: 3 ]

Antenna Measurements - Bevelacqua
Testing of real antennas is fundamental to antenna theory The most common and desired measurements ...

[ Hits: 61 | Votes: 1 | Rating: 10 ]

Ham365 DX Peditions Calendar - ham365
Ham365 let you follow the main DX peditions on a dedicated calendar page that shows ...

[ Hits: 128 | Votes: 1 | Rating: 10 ]

Aircraft Scatter Operations - dj5ar
QSO Procedure for Airplane Reflections Reporting system and procedure confirmation procedure and requirements for a ...

[ Hits: 147 | Votes: 1 | Rating: 10 ]

Short introduction to D-STAR - EssexHam
On this page you will find some basic information about D Star and some handy ...

[ Hits: 55 | Votes: 0 | Rating: 0 ]

Amateur Radio Microwave - Introduction - W6BY
Introdcution to Amateur Radio Microwave A 21 page presentation of ham radio microwaves concepts for ...

[ Hits: 421 | Votes: 0 | Rating: 0 ]

Morse code practice - MorseCodeNinja
A comprehensive morse code auduio guide with several youtube movies classified by skill level characters ...

[ Hits: 134 | Votes: 0 | Rating: 0 ]

PSK: How to Assure a Clean Signal - N4SER
Due to the nature of PSK it is imperative that you maintain a very clean ...

[ Hits: 137 | Votes: 0 | Rating: 0 ]

Daily Sunspots groups - Catania Solar Observatory
All daily drawings of the sunspot groups and USSPS produced by INAF Catania Astrophysical Observatory ...

[ Hits: 80 | Votes: 0 | Rating: 0 ]

Elecraft K4 Transceiver - Elecraft
Official Elecraft K4 Transceiver page at Elecraft web site with technical specifications news manuals and ...

[ Hits: 71 | Votes: 0 | Rating: 0 ]

Interactive Smith chart - Telestrian
The interactive Smith chart enables users to navigate their way around a Smith chart using ...

[ Hits: 288 | Votes: 2 | Rating: 9.5 ]

DDUtil for Flex Radio - K5FR
Data Decoder Utility is designed to enhance the operating experience for Flex Radio users by ...

[ Hits: 117 | Votes: 0 | Rating: 0 ]

Dx-peditions365 App - IW1QLH
Dx peditions365 let you follow the main DX peditions on a dedicated calendar page that ...

[ Hits: 78 | Votes: 0 | Rating: 0 ]

Arduino Flex Controller - IW7DMH
Arduino Flex Controller can be used with the new Flex 6000 Signature rigs It is ...

[ Hits: 115 | Votes: 0 | Rating: 0 ]

The 6CL6-807 Transmitter - VK1SV
This page is a detailed description of a 6CL6 and 807 valve transmitter The page ...

[ Hits: 253 | Votes: 1 | Rating: 10 ]

QRM Eleminator by DC2WK - DC2WK
A home made project to reduce noises from lower bands an X Phase QRM Eliminator ...

[ Hits: 181 | Votes: 0 | Rating: 0 ]

Behringer HA400 Headphone Amplifier and RFI - WB5NHL
Removing disturbing RFI from the Behringer HA400 Headphone Amplifier using ferrites and capacitors soldered in ...

[ Hits: 122 | Votes: 2 | Rating: 5.5 ]
The truth about ferrites - QRM.guru
Articles on the correct placement of ferrite noise suppressors are common but little has been ...

[ Hits: 389 | Votes: 2 | Rating: 9.5 ]
Understanding computer-generated RFI - NU1N
Radio Frequency Interference RFI has always been a source of concern for the Radio Amateur ...

[ Hits: 85 | Votes: 0 | Rating: 0 ]