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Broadcast areaSan Juan–Caguas–Guaynabo metropolitan area
Frequency1030 kHz
BrandingWOSO Radio
FormatNews Talk Information
AffiliationsCBS News Radio
ESPN Radio
Westwood One
OwnerSherman Broadcasting Corporation
First air date
November 21, 1977
Last air date
October 21, 2014
Call sign meaning
W Oso (Spanish for "bear")
Technical information
Facility ID9412
Power10,000 watts unlimited
Transmitter coordinates
18°22′7″N 66°15′17″W / 18.36861°N 66.25472°W / 18.36861; -66.25472Coordinates: 18°22′7″N 66°15′17″W / 18.36861°N 66.25472°W / 18.36861; -66.25472
WebsiteArchive of wosoradio.net

WOSO (1030 kHz) was a commercial AM radio station broadcasting an English-language Talk radio format. Licensed to San Juan, Puerto Rico, it served the San Juan–Caguas–Guaynabo metropolitan area. The station was owned by Sherman Broadcasting Corporation, with Sherman Wildman as president. It featured local talk and information shows, a weekday tradio program and syndicated programming from CBS News Radio, ESPN Radio and Westwood One.


WOSO was launched on November 21, 1977.

WOSO was the only radio station in Puerto Rico that broadcast in English full-time. (AM 1190 WBMJ is a Christian radio station broadcasting in both English and Spanish.) until the K-LOVE station WCAD was launched in early 2019.

On October 21, 2014, after 37 years broadcasting on 1030 AM, WOSO signed off. The transmitter had been vandalized and the Puerto Rico Electric Power Authority was forced to shut down the station. As of October 22, 2014, WOSO is silent. After an initial effort to revive the station as an online stream, nothing further has been heard.


In 1993, Sherman Wildman purchased WOSO for a reported sale price of $1.2 million.[1]


  1. ^ "PUERTO RICO: New English-language radio station proposed". Caribbean Update, available by subscription from HighBeam Research. 1994-12-01. Archived from the original on 2012-10-20.

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