---
kind: "section"
citation: "47 C.F.R. § 73.510"
title: "47"
number: "73.510"
heading: "Antenna systems."
url: "https://uscodex.org/cfr/47/73.510"
---

# §73.510. Antenna systems.

- (a) All noncommercial educational stations operating with more than 10 watts transmitter output power shall be subject to the provisions of [§ 73.316](/cfr/47/73.316.md) concerning antenna systems contained in [subpart B](/cfr/47/subpartB.md) of this part.
- (b) **Directional antenna.** No application for a construction permit of a new station, or change in channel, or change in an existing facility on the same channel will be accepted for filing if a directional antenna with a maximum-to-minimum ratio of more than 15 dB is proposed.

## Notes

### Amendments

[42 FR 36829, July 18, 1977]

### Source

Source: 28 FR 13651, Dec. 14, 1963, unless otherwise noted. Redesignated at 72 FR 45692, Aug. 15, 2007.

### Authority

Authority: 47 U.S.C. 154, 155, 301, 303, 307, 309, 310, 334, 336, 339.

### Amendments

[42 FR 36829, July 18, 1977]