It doesn't address your TV specifically, but this thread has a little info on the general topic:
http://mail.videokarma.org/showthrea...=250452&page=2
The March, 1948 issue of RCA Review has a long technical discussion of the DC component & restoration (page 85):
http://www.americanradiohistory.com/...w-1948-Mar.pdf
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html