Technician exam question T4A05
Subelement T4, AMATEUR RADIO PRACTICES· Group T4A
Where should an RF power meter be installed?
- A.In the feed line, between the transmitter and antenna (correct answer)
- B.At the power supply output
- C.In parallel with the push-to-talk line and the antenna
- D.In the power supply cable, as close as possible to the radio
WhyAn RF power meter should be installed in the feed line, between the transmitter and antenna. An RF power meter reads the RF energy actually flowing to the antenna, so it belongs in the feed line between the transmitter and the antenna, answer A. The power supply output (B, D) carries DC, not RF, and wiring a meter in parallel with the push-to-talk line (C) makes no electrical sense, PTT is a low-level keying signal, not a place to sample transmitter power.
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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