| Frequency | 550 kHz |
|---|---|
| Programming | |
| Format | Public Radio - News - Talk |
| Affiliations | |
| Ownership | |
| Owner | Oregon Public Broadcasting |
| History | |
First air date | January 23, 1923 |
Former call signs | KFDJ (1922–1925) |
Call sign meaning | Oregon Agricultural College (former name of Oregon State University) |
| Technical information[1] | |
Licensing authority | FCC |
| Facility ID | 50587 |
| Class | B |
| Power | 5,000 watts |
Transmitter coordinates | 44°38′12″N 123°11′33″W / 44.63667°N 123.19250°W[2] |
| Links | |
Public license information | |
| Webcast | Listen live |
| Website | opb.org |
KOAC (550 AM) is a non-commercial, listener supported, public radio station licensed to Corvallis, Oregon. The station is owned by Oregon Public Broadcasting, and airs OPB's news and talk programming, consisting of syndicated shows from National Public Radio, American Public Media and the Public Radio Exchange, as well as locally produced offerings. The studios and offices are on South Macadam Avenue in Portland.
KOAC is powered at 5,000 watts. To protect other stations on 550 AM from interference, it uses a directional antenna with a two-tower array. The transmitter is off NE Granger Avenue near U.S. Route 20 in Albany.[3] Due to its transmitter power and location near the bottom of the AM dial, the signal during the day, covers most of Oregon's densely populated areas. It provides at least secondary coverage from Portland to Roseburg. It is the only directional AM radio station in the United States which uses a shunt-fed antenna.[4]
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