Technician exam question T7B11
Subelement T7, PRACTICAL CIRCUITS· Group T7B
Which of the following can eliminate distorted voice transmissions?
- A.Adding extra feedline to the antenna to lower SWR
- B.Turning the radio on and off to reset the computer-controlled circuitry
- C.Adding a clip-on ferrite “choke” to the microphone cable to prevent the transmitted signal from feeding back into the transmitter (correct answer)
- D.Turning the squelch control fully clockwise to prevent the transmitted signal from triggering the squelch circuit
WhyA clip-on ferrite "choke" added to the microphone cable can eliminate distorted voice transmissions by preventing the transmitted signal from feeding back into the transmitter. RF energy from the transmitter can couple back onto the microphone cable and feed into the audio circuitry, distorting the transmitted voice, and a clip-on ferrite choke on that cable chokes off that unwanted RF path, answer C. Adding feedline to lower SWR (A) addresses a different problem entirely, power-cycling the radio (B) won't fix an ongoing RF feedback path, and adjusting squelch (D), a receive-side control, has no effect on what's being transmitted.
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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