Pic of beautiful-sounding DIY OTL power amp built by Bernt Jansson. Many neat details. Tubes are PL509's and heat is wired in series and powered directly from mains. Separate & stabilized anode voltage.
You would need cubic dollars to actually buy someting like this. I think only Graaf does big OTL's nowadays. One nice day I'll try to pull it off on my own.
