Thanks, Phil and David, I appreciate your comments.
This particular Quasar piqued my interest after I read an on-line article at:
https://www.aanda.org/articles/aa/ab...47/aa2347.html
which indicated that in that survey, the QSOs discovered were bright in both radio and optical bands; in particular PMN J1451-1512 was very luminous. PMN J1451-1512 is also now the most distant radio-selected quasar at the time of the survey.
At mag 19.14V gave me some confidence that I would be able to detect it, without the use of IR Pass Filters.
Cheers
Dennis