* Antennas

Antennes - Theorie

Antennes overview

Long wire antenna - random wire

Counterpoise Systems

End fed 1/2 wave feed and matching system

End fed longwire-counterpoise

Best Random Wire Antenna Lengths

What is a counterpoise on an end fed antenna

FD4 - Fritzel

* Baluns 1:1 1:4 1:9

Baluns:what they do and how they do it - W7EL

Berekeningen  Balun's 1:1 en 1:4

Coax Balun en toepassingen

The choke balun 'Ugly Ballun"

Ringkern voor Magnetic Balun 1:9

* Choke balun

Choke balun - Practical

All Band HF Air Core

Mantelstroom filter - Choke Balun

* Common mode chokes - Line Isolators

Common Mode Chokes W1HIS

DIY Line Isolator PIC1  PIC2 - PIC3 - PIC3a

Clamp-on RF Current Meter - G0SNO

Common mode currents meter - IZ2UUF

* Band pass filter

Universal HF Band Pass Filter Kit

* Artifical RF ground

RF ground systems

Home made artifical RF ground - GD4EIP

Home made artificial RF ground - KB4ZGC

Solving RF problems

* SWR

Understanding SWR by Example - K5DVW

SWR and Transmitters - Friends or foes

Measuring RF Voltages with a VOM

* Logbook

Ham Log    HRD Log    eQSL    LotW

Clublog

* SDR Hardware

SDR & DVB-T USB Stick

RF Upconverter for SDR

* SDR Software

HDSDR

SDRSharp

* DX

DX World

DX Spider manual

DX QSL

* Info

eham.net

Contest kalender

IARU ARRL

* WSPR

WSPRnet Reporter network

WSPR Program

Extreme narrow bandwidth techniques

Weak Signals

G4ILO/wspr

What does it mean : Signal to Noise Ratio e.g.-23dB

Signal noise ratio of digital amateur modes

QTH is many km wrong in the WSPR map – fix it!

* General notes

TI's Analoge Engineer's Pocket Reference