Look for older ones, on YouTube I've come across KROQ from the early 80s, and it was with tapes like these that this type of music first got heard in smaller cities and towns.
Someone would go visit the "big city" and come back with radio recorded on cassettes that got copied and passed around.
This is how a lot of people discovered bands like Siouxsie & The Banshees, The Replacements, Depeche Mode, among dozens if not hundreds of others.
Some people took this to an additional level, made and catalogued these tapes, they'd take along their portable tape recorder (boom boxes!) and buy packs of TDK 90-minute tapes while visiting family in LA or San Francisco, come back home with hours and hours recorded over the span of a couple of weeks; they'd write the dates and hours, titles and bands on the carton that folded into the tape box.
I suspect this is why Rolling Stone did their year-end polls, and back in the early-80s it was KROQ at #1 of their "best radio station in the country" list, several years in a row.