View Single Post
  #155  
Old 03-21-2011, 05:07 PM
Tomcomm's Avatar
Tomcomm Tomcomm is offline
VideoKarma Member
 
Join Date: Nov 2007
Location: Santa Ynez, CA
Posts: 353
21CT55 is Alive and Well

My "Frankenstein" 21CT55 is now off life support and performs as good as original. The screen width is still too wide and has some video foldover that has to be tracked down and fixed. Also the chroma section is showing some color drift near the bottom of the screen occasionally. With 115vac mains, I am running B++ at 396v, boost at 790v, ultor at 27kv. Horiz system current measures 170ma at the fuse, therefore the HOT cathode is the same or less. Please lets not rehash this issue, OK!
I've been playing the "Wizard of Oz" DVD. Am very impressed with the near saturated (Lolly-Pop) screen colors. The screen looks much better than my digital cameras can capture. Seems the CTC2B video system and the 21FBP22A crt have greater brightness dynamic range then the camera's. If I run the camera's brightness down to get good pure whites (tablecloth, blouses etc) without blooming, I loose all low level dark detail in the shadows. The CRT has no problems with these scenes. I find this very disturbing and wish some VK members would drop by for direct viewing.
Anyway, this ".....death" thread is no longer relevant and I intend to go back to my original "RCA 21CT55 #8802897 is Alive!" thread. I feel good about this...........Tom
Attached Images
File Type: jpg Copy of P3110286.jpg (71.4 KB, 47 views)
File Type: jpg Copy of P3110294.jpg (69.2 KB, 47 views)
File Type: jpg Dorithy 12..jpg (55.0 KB, 51 views)
File Type: jpg Mob Scene 3..jpg (86.6 KB, 64 views)
File Type: jpg Dorathy and gd Witch..jpg (85.5 KB, 58 views)

Last edited by Tomcomm; 03-26-2011 at 10:40 AM.
Reply With Quote
Audiokarma