The idea gained little momentum until 1959, when Press addressed the local Rotary Club in the state capital, Frankfort, and a story about it appeared in the Louisville Courier-Journal. After landing support from UK officials, what was supposed to be a short meeting with Governor Bert T. Combs turned into a proposal to start the network. The Kentucky Authority for Educational Television was created in 1962, with Press as executive director (a position he held until 1991). However, the project made little progress until 1965, when a donation from Ashland Oil founder Paul Blazer allowed the authority to acquire its first 13 transmitters. KET finally took to the air on September 23, 1968. Later, its acquisition of Louisville PBS station WKPC-TV allowed it to start a second service on the Louisville station it already owned.
| Station | City of license | Channels (Analog/ Digital) | First air date | Call letters’ meaning | ERP (Analog/ Digital) | HAAT (Analog/ Digital) | Facility ID | Transmitter Coordinates |
| WKAS | Ashland | 25 (UHF) 26 (UHF) | September 23, 1968 | Kentucky AShland | 162 kW 61.3 kW | 152 m 137 m | 34171 | |
| WKGB-TV1 | Bowling Green | 53 (UHF) 48 (UHF) | September 23, 1968 | Kentucky Green Bowling or Kentucky's Good Bowling Green (WKBG was not available in 1968) | 676 kW 54.8 kW | 246.9 m 234 m | 34177 | |
| WCVN-TV2 | Covington | 54 (UHF) 24 (UHF) | September 8, 19693 | CoVingtoN | 162 kW 53.5 kW | 122 m 117 m | 34204 | |
| WKZT-TV4 | Elizabethtown | 23 (UHF) 43 (UHF) | September 23, 1968 | Kentucky EliZabethTown | 692 kW 61 kW | 198 m 178 m | 34181 | |
| WKHA | Hazard | 35 (UHF) 16 (UHF) | September 23, 1968 | Kentucky HAzard | 646 kW 53.2 kW | 384 m 369 m | 34196 | |
| WKLE | Lexington | 46 (UHF) 42 (UHF) | September 23, 1968 | Kentucky LExington | 1260 kW 45.8 kW | 265 m 257.6 m | 34207 | |
| WKPC-TV5 | Louisville | 15 (UHF) 17 (UHF) | September 8, 19586 | Kentucky Park Central (for Central Park) -or- Kentucky Public Communications | 589 kW 60.3 kW | 264 m 237 m | 21432 | |
| WKMA-TV7 | Madisonville | 35 (UHF) 42 (UHF) | September 23, 1968 | Kentucky MAdisonville | 617 kW 55.1 kW | 317 m 298 m | 34212 | |
| WKMR | Morehead | 38 (UHF) 15 (UHF) | September 23, 1968 | Kentucky MoRehead | 676 kW 51.4 kW | 293 m 289 m | 34202 | |
| WKMU | Murray | 21 (UHF) 36 (UHF) | October 9, 1968 | Kentucky MUrray | 692 kW 56.9 kW | 201 m 187 m | 34174 | |
| WKOH | Owensboro | 31 (UHF) 30 (UHF) | December 31, 1979 | Kentucky OHio Valley -or- Kentucky Owensboro Henderson | 550 kW 63.3 kW | 140 m 124 m | 34205 | |
| WKON | Owenton | 52 (UHF) 44 (UHF) | September 23, 1968 | Kentucky OweNton | 676 kW 49.7 kW | 216 m 214 m | 34211 | |
| WKPD8 | Paducah | 29 (UHF) 41 (UHF) | May 31, 1971 | Kentucky PaDucah | 145 kW 55.7 kW | 152 m 143 m | 65758 | |
| WKPI-TV9 | Pikeville | 22 (UHF) 24 (UHF) | September 23, 1968 | Kentucky PIkeville | 1320 kW 50.4 kW | 430 m 423 m | 34200 | |
| WKSO-TV10 | Somerset | 29 (UHF) 14 (UHF) | September 23, 1968 | Kentucky SOmerset | 589 kW 53.3 kW | 445 m 429 m | 34222 | |
KET2 based on KET's original Louisville station, WKMJ channel 68 airs the national PBS schedule, local programming including shows focused on the Louisville area, children's shows, how-to series, documentaries and public affairs programs. Outside of Louisville, KET2 can be seen on several cable systems across Kentucky, as well as on KET's digital signals.
| Station | City of license | Channels (Analog/ Digital) | First air date | Call letters’ meaning | ERP (Analog/ Digital) | HAAT (Analog/ Digital) | Facility ID | Transmitter Coordinates |
| WKMJ-TV11 | Louisville | 68 (UHF) 38 (UHF) | September 2, 197012 | Kentucky Media and Journalism | 1350 kW 61.6 kW | 251 m 218 m | 34195 | |
KET KY (formerly KET3), which is available on digital, formerly broadcast all of the network's educational programming. Beginning in January 2008, however, KET3 became KET KY, "The Kentucky Channel," broadcasting programs by, about and for Kentuckians 20 hours each day. KET KY also broadcasts coverage of the Kentucky General Assembly while it is in session, combining the services previously offered on KET5 and KET6. From 8:00 to midnight Eastern time, KET KY broadcasts as KET HD, showing high-definition programming from PBS and other public television sources.
KET ED (formerly KET4), offered KET's digital service in prime time and the Annenberg Channel at other times and was available on digital. In Louisville, this service was also available around-the-clock on WKMJ's digital signal, but has since been discontinued, due to PBS's increase of fees for the usage of the national PBSHD channel. Instead, KET reinvested the money for new digital equipment, plus the ability to present local and delayed programming in high-definition. This increase of PBSHD fees has also led to KET scheduling HD programming themselves, rather than merely picking up the national feed.
Today, KET ED has combined the educational programming from ITV, Annenberg and KET's own professional development series and PBS' educational content, all of which was previously seen on either KET3 or KET4.
KET5 and KET6 featured live coverage of the Kentucky House of Representatives and Senate respectively, while the state General Assembly was in session. These channels were eliminated in January 2008 when KET realigned its digital programming (see KET KY and KET ED above).
KET was affiliated with NET when the network was first established on September 23, 1968.
Louisville's WKPC and WKMJ are the only KET stations to have their transmitters outside of Kentucky -- their transmitters are located at the Tower Farm in Floyds Knobs, Indiana, just north of New Albany. Because of its location and signal strength (according to FCC data), WKPC and WKMJ cover more of Indiana than Kentucky. (Similarly, Covington's WCVN covers more of Ohio than Kentucky, although its transmitter is located in Kentucky.)
WCVN also serves Cincinnati, while WKOH also serves Evansville, Indiana.
KET, among its many educational programs, runs a Distance Learning program. The program has course offerings for Latin, Humanities, Physics and German language. The program offers leveled courses ranging from introductory to advanced placement classes. The program is offered primarily for high school students in Kentucky, for whom it is offered tuition free. However, out-of-state schools may enroll students in the course for a small tuition fee.
The aim of the program is to provide a full course in the aforementioned subjects for schools who do not offer a particular class. Often schools seek distance learning as a temporary solution in cases of funding cuts which lead to dismissal of teachers or discontinuation of the teaching of certain subjects altogether. The program also is popular with parents of homeschooled children.
The program was established in 1989 primarily for high school students in Kentucky. The direct-to-school model became possible after a substantial expansion of the network's headquarters (now dubbed "The O. Leonard Press Telecommunications Center") and legislative funding to provide a satellite receiver for every school and public library in the state. The course was originally administered and taught via live satellite broadcasts directly into classrooms with two-way keypads for real-time student-teacher interaction. Homework, tests, quizzes, etc. were distributed by modem and mail.
Since the mid nineties, KET's Distance Learning program has migrated from broadcast lessons to instruction via KET's website and multimedia lessons on tape, CD, and DVD.