General exam question G1E10
Subelement G1, COMMISSION’S RULES· Group G1E · 47 CFR §97.101
Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?
- A.A system of propagation beacon stations operates on those frequencies (correct answer)
- B.A system of automatic digital stations operates on those frequencies
- C.These frequencies are set aside for emergency operations
- D.These frequencies are set aside for bulletins from the FCC
Why14.100, 18.110, 21.150, 24.930, and 28.200 MHz each host a network of propagation beacon stations that routine transmissions there would interfere with. 14.100, 18.110, 21.150, 24.930, and 28.200 MHz each host a coordinated network of propagation beacon stations, and transmitting there routinely would interfere with the weak, carefully scheduled signals those beacons rely on for their own monitoring to work, answer A. No automatic digital station network, emergency reservation, or FCC bulletin service occupies these particular frequencies.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2023-2027 NCVEC Element 3 pool (public domain); the explanation above is original writing, see our methodology.
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