there is an RCA patent out there as well looks like what is used by the CTC-17 (single NPN transistor) except the B+ is listed as 405v while the CTC-17 uses the voltage drop across the supressor resistor on the horz out to supply 27v.
http://www.google.com/patents/US3436475
I wonder if this would help with some of the Macro vison lines seen on some early RCA and clones.