Amateur Extra › E4 Amateur Practices › E4C02
E4C02
Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?
Pick an answer to check it.
Answer: A. A front-end filter or preselector
A front-end filter or preselector blocks strong signals outside the band before they reach the first stages. IF and notch filters come later and cannot stop front-end overload.
Tip: Stop out-of-band signals at the front door.