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  #631  
Old 11-10-2015, 09:18 AM
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DavGoodlin DavGoodlin is offline
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Quote:
Originally Posted by BigDavesTV View Post
Most likely a manufacturing defect, I have also seen this in CRT's that have been rebuilt. I have a Zenith roundie with a Channel Master rebuilt 21FJP, that has a small error, that is hardly noticeable. All it would take is for a small chunk to fall down onto the mask, during the neck removal or reinstallation process, especially during rebuild.
Dave - Id take this any day over what happened to my RCA Hi-Lite 21FBP22 - neck just neatly sheared itself and went to air right where the blue lateral spring rests
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  #632  
Old 11-10-2015, 08:10 PM
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Dave - Id take this any day over what happened to my RCA Hi-Lite 21FBP22 - neck just neatly sheared itself and went to air right where the blue lateral spring rests

Ugh...that really stinks. Was that tube a rebuilt, or one that had been in service and suddenly broke? I have not seen that happen yet, but I'm always careful about not making yoke and purity clamps too tight, and I have wondered about the tension on the blue lateral magnet, more than once.
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  #633  
Old 11-11-2015, 12:14 PM
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Originally Posted by DavGoodlin View Post
Dave - Id take this any day over what happened to my RCA Hi-Lite 21FBP22 - neck just neatly sheared itself and went to air right where the blue lateral spring rests
If you think that sucks, then put your self in miniman82's shoes....He had that happen on a working prototype metal cone color CRT. The neck glass near the base one day randomly decided to fracture, and there went a few k dollars worth of it's value.
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  #634  
Old 01-10-2016, 09:34 PM
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Restoring an admiral c322
 
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Just found out where this set came from and who owns it. This set belonged to Mrs. Rose Roti who lived on 1031 Woodbine Ave (cool house) in Oak Park IL. Sadly, Mrs. Roti passed in 1997. Wonder what she would think if she saw the set working again.
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  #635  
Old 01-10-2016, 09:39 PM
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David Roper David Roper is offline
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She'd probably be less surprised the set was living again than that she was.
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  #636  
Old 01-10-2016, 09:41 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Originally Posted by David Roper View Post
She'd probably be less surprised the set was living again than that she was.
You're probably right...
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  #637  
Old 02-05-2016, 08:41 PM
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Restoring an admiral c322
 
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Turned the set on today after a month or two of sitting dormant. There is a complete absence of red. Red gun checks brilliant red screen and background react as normal. It is just that I have no red in the color spectrum. What could be the cause of this?

Resolved. X Demod tube had a burned out filament.
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Admiral C322C2 Regent (Restoring)
RCA CTC-7 Pensbury (Restored)
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Last edited by SwizzyMan; 02-05-2016 at 09:13 PM. Reason: Issue resolved
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  #638  
Old 02-05-2016, 09:57 PM
old_coot88 old_coot88 is offline
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That's an example of why restored sets are always a "work in progress".
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  #639  
Old 02-06-2016, 04:00 PM
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Hi, Very glad to know it was only a 12AZ7 gone bad. Just a little hint about color loss or intermittent, but only for the early production chassis with wax caps: wax dripping on the -Y output sockets can cause loss of color(s). Cleaned up the socket, and put in Orange Drops. Problem solved!
Kevin
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  #640  
Old 02-06-2016, 09:48 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Quote:
Originally Posted by stromberg6 View Post
Hi, Very glad to know it was only a 12AZ7 gone bad. Just a little hint about color loss or intermittent, but only for the early production chassis with wax caps: wax dripping on the -Y output sockets can cause loss of color(s). Cleaned up the socket, and put in Orange Drops. Problem solved!
Kevin
Thanks for the tip! I used a 12AT7 in place of the 12AZ7. 12AT7 is identical to the AZ7 except for heater current and a lower gain. The 12AT seems to make the reds a lot more balanced with the other colors even with red turned all the way up.
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