Here is a better recording of the 1984 one. https://www.youtube.com/watch?v=yObHAh_PFHsRSR wrote: ↑25 Apr 2019, 19:04 Thiruvaiyaru Sri Thyagaraja Aradhana 1984https://www.youtube.com/watch?v=WaGSo7ZKSms
Likely that one - may be it was around 9:30 - 10 PM. Unless it was delayed recording broadcast and it happened earlier. The Kodaikanal TV Relay wasn't until 1987.
I don't know how present day musicians are not emulating her. Does the latter mean they have to be literally like that. Thiruvaiyaru is a specific religious celebration. Also why should they not sing any kriti, and padams and javaLis? Why should not scores of people who throng it from around Tanjore villages get to hear all of these? This may be their only live event.