I've logged 3C 273 with my 101mm Tele Vue apochromat from Cherry Springs State Park.
Finder charts are available at http://www.cs.cmu.ed...uasar3c273.html and https://www.lsw.uni-...s/1226 023.html
An outburst from quasar CTA 102 took place late last year that made it historically bright, bright enough to be seen with very small apertures. Cloudy Nights member Sasa reported seeing CTA 102 through a 63mm Zeiss Telementor several times in December. I observed it a number of times through the ASH 17" f/15 classical Cassegrain and also saw it through one of the club's 14" f/10 Meade SCTs.
I've observed a number of very distant quasars including the Double or Twin Quasar and Einstein's Cross through large apertures.
http://www.skyhound....2237 0305A.html (I was able to see three of its components through a 32" ATM Dob.)
http://www.astronomy...pace/dblqso.htm (I've observed the Double Quasar through a 30" Tectron Dob and somewhat smaller Dobs.)
There's information on observing quasars with amateur telescopes at the following URLs: