[Elecraft] Broadcast band interference

[Al Lorona]

There are at least two other ways of knocking down interference from nearby AM 
broadcast stations. Each requires the choice of a particular type of antenna.

The first is to use a balanced tuner of the link-coupled type (the Johnson 
Matchbox and Annecke Coupler are the most famous examples) which has a highpass 
response and can add some 30 dB to reject AM BC signals.

The second is to use a small transmitting loop (STL) which has a very narrow 
bandwidth and rejects all signals more than a few kHz away.


Al  W6LX 



> If a station is very close, you may have to use a filter at the shack
> end of the feedline to notch it out.