The usual trend in local Arbitron radio ratings continues - the shares of all stations are getting smaller and smaller. Competition is now measured in tenths of percentages, instead of full points.

However, another trend of note is the increased interest in sports talk radio. KFNZ (alias "K-Fan," AM-1320) doubled its audience between the winter and spring of 1998.Of course, there's no doubt that the success of the Utah Jazz in the NBA playoffs was a key factor in this. After all, KFNZ is the flagship station of the Jazz.

KFNZ was ranked only 14th among radio listeners aged 25-54 last winter. Last spring (April, May and June), they leaped to third, behind KSFI and KODJ, but ahead of KSL.

Among all ages (12-plus), KFNZ improved from 15th to fifth.

- Here are the Arbitron radio estimates for radio listeners, ages 12-plus, Monday to Sunday, 6 a.m. to midnight, for the spring of 1998:

1. KZHT (7.1 percent share); 2. KSL-AM (6.6); 3. KSFI (6.4); 4. KODJ (5.3); 5. KFNZ-AM (5.2); 6. KSOP AM/FM (5.1); 7. KUBL (4.6); 8. KXRK (4.3); 9. KBER (4.1); 10. KRSP (3.8).

11. (tie) KENZ and KURR (3.6); 13. KISN (3.5); 14. KKAT (3.4); 15. KQMB (3.2); 16. (tie) KBEE, KDYL/KOVO-AM and KNRS-AM (2.9); 19. KUMT (2.1); 20. KOSY (1.9); 21. KALL-AM (1.8); 22. KBZN (1.7); 23. KSVN-AM (1.1); 24. KRAR (0.9); 25. (tie) KLO-AM and KSNU (0.6).

- Here are the Arbitron radio estimates for radio listeners, ages 25-54, Monday to Sunday, 6 a.m. to midnight, for the spring of 1998:

1. KSFI (7.3); 2. KODJ (6.9); 3. KFNZ-AM (6.4); 4. (tie) KSL-AM and KUBL (5.4); 6. KSOP AM/FM (5.1); 7. KRSP (5.0); 8. (tie) KISN and KURR (4.8); 10. (tie) KENZ and KKAT (3.9).

12. KZHT (3.6); 13. KQMB (3.4); 14. (tie) KBEE and KBER (3.2); 16. KUMT (3.1); 17. KNRS-FM (2.8); 18. (tie) KOSY and KXRK (2.4); 20. KBZN (2.2); 21. KALL-AM (1.7); 22. KSVN-AM (1.3); 23. KDYL/KOVO-AM (1.2); 24. KRAR (0.5); 25. (tie) KLO-AM and KSNU (0.2).

- "SUNNY 107.9" is no more. Earlier this week, KSNU ceased and began simulcasting KOSY (FM-106.5), a station of "soft and relaxing favorites."

If you want "timeless music," the AM dial is your only choice now with either KDYL/KOVO (AM-1280 and AM-960) or KLO (AM-1430).

Trumper Communications, owner of KOSY, also leases FM-107.9. It wanted to expand the signal of "Sunny," which has its transmitter on Promontory Point, Box Elder County, but the FCC has now limited new translator stations.

Since it couldn't expand, "Sunny" wasn't going to be an economic success and so Trumper decided to simulcast the very successful KOSY, since it's transmitter is on Lake Mountain in Utah County. The two signals complement each other very well.

Trumper's Salt Lake general manager Pat Reedy said he hated to let "Sunny" go, but it was an economic decision. KOSY, meanwhile, is in fourth place among female listeners ages 25-54.

- KCPW (FM-88.3 and 105.1) has appointed a program director and added three new popular pubic radio shows to its weekend lineup.

Beverly Amsler is the station's first news director. She's an award-winning public radio journalist and has already created a community calendar for the station, plus some impressive local newscasts.

"She is an aggressive journalist, professional in her approach, with an excellent on-air presence," said station manager Chris Eisenberg. "We're incredibly excited to have her be the one to start our local news and operations."

The three new shows on KCPW are "Car Talk" (Saturdays 9-10 a.m. and repeated Sundays 10-11 a.m.), "This American Life" (Sundays 5-6 p.m.) and "Selected Shorts" (Sundays, 4-5 p.m.).

- KWUN (AM-1230) - The "Infinite Fields" pop music show hosted by Nyk Fry has moved from KALL to this station and airs each Friday, from midnight to 6 a.m. on Saturday.

The Aug. 7 broadcast will be a special program paying tribute to the late Kenneth Richard Goetz, 53, owner of Ken's World Best Studio in Salt Lake.

Fry said anyone wanting to make a personal tribute to Goetz can call 488-9198 to record a 15-second message. The tributes will be used as part of the show.

- RADIO HAPPENINGS - Jimmy Chunga on KENZ had to have a "Super Community College" quiz this week because the test questions for listeners were too easy last week . . . Tom Barberi on KALL discussed polygamy Monday . . .

"Simon and Brady" on KBEE had another "What Is the Movie?" quiz Monday . . . "The Z-Morning Zoo" on KZHT Monday interviewed the author of "How to Marry a Millionaire" . . . "Johnson and Johnson" on KUBL gave away Weber County Fair tickets to lucky listeners this week . . .

"Kerry, Bill and Gina" on KXRK awarded Beastie Boys tickets and a trip to Toronto this week . . . "The Freak Show" on KURR Monday had a "Beat the Reaper" segment Monday . . . Jon Carter on KRSP had a spoof Monday on "Mr. Ed Zeplin" . . . "Fisher, Todd and Erin" on KISN Monday discussed HDTV.