Technician exam question T7B07
Subelement T7, PRACTICAL CIRCUITS· Group T7B
Which of the following can reduce interference to a 2-meter band transceiver from a nearby commercial FM station?
- A.Installing an RF preamplifier
- B.Using double-shielded coaxial cable
- C.Installing bypass capacitors on the microphone cable
- D.Installing a band-reject filter (correct answer)
WhyInstalling a band-reject filter can reduce interference to a 2-meter band transceiver from a nearby commercial FM station. A band-reject (notch) filter tuned to the commercial FM broadcast band can be installed to block that strong nearby signal from reaching a 2-meter transceiver's front end, answer D. An RF preamplifier (A) would make the overload worse by amplifying the interfering signal too, double-shielded coax (B) helps with cable pickup but not front-end overload from a signal arriving via the antenna itself, and bypass capacitors on a microphone cable (C) address audio-frequency pickup, not RF interference at the receiver.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2026-2030 NCVEC Element 2 pool (public domain); the explanation above is original writing, see our methodology.
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