KNOW-FM (91.1 FM) is the flagship

radio station Radio broadcasting is transmission of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radi ...

Minnesota Public Radio Minnesota Public Radio (MPR), is a public radio network for the state of Minnesota. With its three services, News & Information, YourClassical MPR and The Current, MPR operates a 46-station regional radio network in the upper Midwest. MPR ha ...

's news and information network, primarily broadcasting a

talk radio Talk radio is a radio format containing discussion about topical issues and consisting entirely or almost entirely of original spoken word content rather than outside music. Most shows are regularly hosted by a single individual, and often featu ...

format to the Minneapolis-St. Paul market. The frequency was the original home of

KSJN KSJN (99.5 FM, "YourClassical MPR") is the flagship station of Minnesota Public Radio's classical music network, serving the Twin Cities region. KSJN's studios are located at the MPR Broadcast Center on Cedar Street in downtown St. Paul, while ...

, but the purchase of a commercial station at 99.5

MHz The hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose expression in terms of SI base units is s−1, meaning that one he ...

1991 File:1991 Events Collage.png, From left, clockwise: Boris Yeltsin, elected as Russia's first president, waves the new flag of Russia after the 1991 Soviet coup d'état attempt, orchestrated by Soviet hardliners; Mount Pinatubo erupts in the Phi ...

allowed MPR to broadcast distinct talk radio and classical music services. KNOW-FM's studios are located in the MPR Broadcast Center on Cedar Street in downtown

St. Paul Paul; grc, Παῦλος, translit=Paulos; cop, ⲡⲁⲩⲗⲟⲥ; hbo, פאולוס השליח (previously called Saul of Tarsus;; ar, بولس الطرسوسي; grc, Σαῦλος Ταρσεύς, Saũlos Tarseús; tr, Tarsuslu Pavlus; ...

, while its transmitter is located on the Telefarm Towers in

Shoreview Shoreview is a city in Ramsey County, Minnesota. The population was 25,043 at the time of the 2010 census. In 2008, Shoreview ranked fourth in a ''Family Circle'' list of best family towns. Geography According to the United States Census Burea ...

History

The KNOW intellectual unit dates from 1980, when WLOL (1330 AM) was purchased by MPR in 1980 and changed its call letters to KSJN-AM, a simulcast of its FM sister. MPR was already making plans to offer a two-channel network when it acquired the frequencies to do so, and bought the AM frequency as a stopgap. In 1989, KSJN-AM changed its call letters to KNOW and began airing an expanded lineup of NPR programming. Two years later, MPR bought 99.5 FM–the former WLOL-FM. At that time, MPR moved the KNOW call letters and intellectual unit to 91.1, while the KSJN calls moved to 99.5 as a full-time classical music station. The AM signal was later spun off into a for-profit subsidiary to help fund the public broadcaster, and was eventually sold off. The station has since reverted to its original WLOL

call sign In broadcasting and radio communications, a call sign (also known as a call name or call letters—and historically as a call signal—or abbreviated as a call) is a unique identifier for a transmitter station. A call sign can be formally assign ...

. In the 1970s, KSJN 91.1 FM and WLOL (99.5 FM) cooperated in an experimental use of

quadraphonic Quadraphonic (or quadrophonic and sometimes quadrasonic) sound – equivalent to what is now called 4.0 surround sound – uses four audio channels in which speakers are positioned at the four corners of a listening space. The system allows for th ...

stereo, with each station carrying two channels of audio. However, this "quadcast" had some undesirable "ping-pong" effects, much like early stereo broadcasts using the same method did. As KNOW now mainly broadcasts spoken word programming, the station broadcasts in analog in

monaural Monaural or monophonic sound reproduction (often shortened to mono) is sound intended to be heard as if it were emanating from one position. This contrasts with stereophonic sound or ''stereo'', which uses two separate audio channels to reproduc ...

audio in order to extend the station's coverage to its fullest extent possible.

HD Radio

KNOW-FM features "Radio Heartland", a Web-and HD Radio- service, on its HD Radio subchannel. Its playlist consists primarily of acoustic, singer-songwriter, folk and Americana music. The service launched in December 2008.Schmitt, Christina. "From the Heart: Dale Connelly brings Radio Heartland to the digital world." ''Minnesota Monthly,'' February 2009. Radio Heartland's schedule also includes the programs

Live from Here ''Live from Here'', formerly known as ''A Prairie Home Companion with Chris Thile'', is an American variety radio show known for its musical guests, tongue-in-cheek radio drama, and relaxed humor. Hosted by Chris Thile, it aired live on Saturd ...

and

American Routes American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, pe ...

from

American Public Media American Public Media (APM) is an American company that produces and distributes public radio programs in the United States, the second largest company of its type after NPR. Its non-profit parent, American Public Media Group, also owns and o ...

, and the shows The Thistle & Shamrock and Mountain Stage from

NPR National Public Radio (NPR, stylized in all lowercase) is an American privately and state funded nonprofit media organization headquartered in Washington, D.C., with its NPR West headquarters in Culver City, California. It differs from other ...

. These additional shows were added to Radio Heartland's schedule in November 2009.

Austin, Texas

The callsign KNOW was also used by a major AC radio station in

Austin, Texas Austin is the capital city of the U.S. state of Texas, as well as the seat and largest city of Travis County, with portions extending into Hays and Williamson counties. Incorporated on December 27, 1839, it is the 11th-most-populous city ...

, located at 1490 kHz. The station signed off in 1989 after operating for 50 years. The Spanish station KLGO assumed the frequency in 1993.

Lufkin, Texas

The callsign KNOW was also used by an oldies station in

Lufkin, Texas Lufkin is the largest city in Angelina County, Texas and the county seat. The city is situated in Deep East Texas and about 60 miles west of the Texas-Louisiana border. Its estimated population is 35,021 as of July 1, 2019. Lufkin was founded ...

, located at 1420 kHz, until it suffered a fire and shut down in 1987. It was owned by Pine Air, Inc.

References

*Mark Durenberger (1999).
Early quad-casts and other fun.
The Broadcast Archive: War Stories.

External links