View Single Post
  #144  
Old 02-18-2017, 04:02 PM
SwizzyMan's Avatar
SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
Join Date: Apr 2015
Location: Side Lake Mn
Posts: 886
I replaced a shorted 12BH7 (R-Y G-Y Demod) and a shorted 6AG7 (Demod driver) tube hoping I would see at the least a bit of improvement. Well there was none whatsoever, if anything the picture quality has gotten worse by just sitting for a mere month. I still have no red which pisses me off since I really thought the shorted R-Y demodulator tube might have given me a hint of red when replaced. At one point I had red. Once I did a recap, I lost it which doesnt make any sense to me. Also I still need to figure out what all the interference associated with the color being present in the picture is all about. While I had the chassis on the bench testing voltages and checking wave forms, a resistor started smoking. It was a 10K 2watt resistor feeding a 285v supply off of the demodulator coil, its value has now risen out of tolerance so I will replace it regardless. Not sure if this may be an issue with the total absence of red. There is also a thick line on the side of the crt when the set it on, doesnt look like a drive line to me. Ive got my work cut out for me and I still have a lot to learn about these sets even though Ive restored two other roundies. Anyone here have any ideas on where i would even begin to look?
Attached Images
File Type: jpg 20170218_144923.jpg (82.8 KB, 47 views)
File Type: jpg 20170218_145003.jpg (73.9 KB, 32 views)
File Type: jpg 20170218_145051.jpg (73.8 KB, 44 views)
File Type: jpg 20170218_145123.jpg (88.2 KB, 38 views)
File Type: jpg 20170218_160200.jpg (50.3 KB, 26 views)
__________________

Admiral C322C2 Regent (Restoring)
RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
Reply With Quote