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Local QRM noise reduction


It is not always possible or allowed to tackle the sources of local QRM. What remains is trying to reduce the noise level by means of your antenna system
post 02 Nov 2020


Antenna Shortwave Links

41



Inverted L antenna per 160 metri
The principle is actually very simple inverted L resonant antenna with a predominance of vertical components particularly advantageous for DX operation

Local QRM/noise reduction, PA0SIM
It is not always possible or allowed to tackle the sources of local qrm. What remains is trying to reduce the noise level by means of your antenna system

Loop antenna for shortwave, KR1ST
The small single turn magnetic loop SSTML antenna consists of a single winding inductor, about 3 feet 1 meter in diameter, and a tuning capacitor

Loops, K9AY
A comparison of the real estate needed for four EWEs and the K9AY Loop system shows that the loops need only 1/7 the area of the EWEs, yet they provide the same directional patterns

Magnetic Loop Antenna
The simple remote control was originally designed to operate with a 2.5m portable mag loop for 20-15m and therefore uses batteries