
1) Radio terminology
Found on
https://www.crosswordclues.com/clue/trimulcast

The term `trimulcast` was first used in May 1981 by Multimedia Broadcasting`s outlets in Little Rock, Arkansas, KAAY-AM (50,000 watts, clear channel) and KLPQ-FM (100,000 watts) when they teamed-up with Cox Cable locally. KAAY/KLPQ`s morning program was already being simulcasted and by building a `radio control room/studio` set at the cable ...
Found on
http://en.wikipedia.org/wiki/Trimulcast
No exact match found.