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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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2nd Feb 2017, 9:57 pm | #1 |
Retired Dormant Member
Join Date: Aug 2013
Location: Celje, Slovenia.
Posts: 128
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Question about CRT picture tube
Okay so this is a Grudnig Zauberspiegel 53T has about 17 tubes in it and i have a question about the crt itself, never camed acroos one that had a theme like this one, kind of a weird color picture tube and was wondering if its normal being like that
http://www.radiomuseum.org/r/grundig...53_luxust.html So does the picture tube look fine ?, Im just worried that the weird color could be the result of air that leaked into it ?? And the guy wants 100 euro for it,I know its a risk for that money buying it without being able to test the picture tube,but can maybe inspect the insides, I offered 50 euro and havent heard back fro him yet so ? |
2nd Feb 2017, 10:16 pm | #2 |
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Join Date: Mar 2012
Location: Fife, Scotland, UK.
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Re: Question about CRT picture tube
Some tubes had implosion guards bonded onto the front with an optically transparent adhesive. Some camera lenses have elements bonded together this way too. The adhesive can go off and suffer fungal infestation. This has that sort of appearance.
Some tubes were coloured to enhance contrast, but I don't think an uneven colour would have helped sales. David
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2nd Feb 2017, 10:37 pm | #3 |
Retired Dormant Member
Join Date: Aug 2013
Location: Celje, Slovenia.
Posts: 128
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Re: Question about CRT picture tube
The picture tube itself looks fine ? its only on the outside ? can that fungal infestation affect the picture, is it like Cataract on a color tube ?
Can it be cleaned Also what do you mean by unevean color ?*? |
2nd Feb 2017, 10:49 pm | #4 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Question about CRT picture tube
There is a possibility that the inside of the Perspex implosion screen is just very dirty.
I don't think they produced 'bonded tubes' in the 17" size. Maybe the whole cabinet was dirty and the guy cleaned it for sale leaving the cigarette smoked screen alone being inaccessible to him. Nothing is guaranteed unless you remove the back and have a look. It certainly is a strange colour but I have seen similar where a whole family smoke. John. |