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  #1  
Old 01-03-2010, 09:52 AM
andy andy is offline
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Last edited by andy; 12-07-2021 at 04:36 PM.
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Old 01-03-2010, 09:55 AM
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Carmine Carmine is offline
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Heathkit IT-5230

Blue does show up on the screen in the service position, but will not balance with the others.
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Old 01-03-2010, 05:28 PM
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sampson159 sampson159 is offline
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sounds like it is time to replace it.what crt do you need?i have scrapped a few things and may have it.
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Old 01-03-2010, 06:54 PM
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Carmine Carmine is offline
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Quote:
Originally Posted by sampson159 View Post
sounds like it is time to replace it.what crt do you need?i have scrapped a few things and may have it.
Thanks.. I actually have a couple spares myself, black matrix CRTs in fact.

But it's like this... It will be years until I can perform a proper restoration on this TV. There are a lot of hack repairs, but it does work reasonably well now with the exception of the weak blue gun (and some other minor issues).

I'm giving this set a place in my living room, so I'd at least like to be able to turn it on now and then and have it produce a reasonable picture. I'd rather hold off on the CRT change if at all possible, and just do that at the same time as a full recap. Most of the time, it will sleep behind doors.

Right now, a little jolt is all I have time for. This seems like a perfect rejuv scenario.
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Old 01-07-2010, 06:55 AM
eberts eberts is offline
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The reason one heater is brighter is you have a parallel wired heater in the electron gun on tube in your photo. Obviously it is defective. That type of gun was used in first rectangular tubes during the mid 60's. Later most manufacturers when to a lower current series wired string heater, except for Admiral when they manufactured their own tubes. Your tube needs to be replaced or reprocessed.
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Old 01-24-2010, 10:50 AM
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Carmine Carmine is offline
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Well I thought I'd update this thread to reflect some news... I have the blues.



...and I couldn't be happier.

Compare that to the "before" (Believe it or not, that picture is supposed to be CoLoR)



Now Mr. Spock's uniform isn't violating regulation.

Captain Moody advised me to put the CRT tester/rejuv into the test position and keep upping the heater voltage until I saw some life on the blue gun. I did as told, and suddenly, around 8v, the blue gun jumped up and pegged the scale!

So I know have a set that functions on all three colors, without a ton of work. After re-running all the tests, the tube now shows very strong, and the pictures back that up!
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Last edited by Carmine; 01-24-2010 at 10:56 AM.
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Old 01-24-2010, 10:54 AM
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Very nice! How is everything else with the set?
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