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 Astor Devon Fringe Television - A Few Questions ***UPDATE***
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 Return to top of page · Post #: 16 · Written at 7:02:08 PM on 28 December 2017.
Andrew Nossol's Gravatar
 Location: Melbourne, VIC
 Member since 26 December 2017
 Member #: 2191
 Postcount: 9

Ian - I have now made my email public.

 Return to top of page · Post #: 17 · Written at 10:19:23 PM on 28 December 2017.
Brad's avatar
 Location: Greenwich, NSW
 Member since 15 November 2005
 Member #: 1
 Postcount: 6183

Documents uploaded to Posts 10 and 15.

A valve a day keeps the transistor away...

 Return to top of page · Post #: 18 · Written at 11:08:04 PM on 28 December 2017.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1902

This must be phosphor burn????

 Return to top of page · Post #: 19 · Written at 8:24:41 AM on 29 December 2017.
BringBackTheValve's Gravatar
 Location: Linton, VIC
 Member since 30 December 2016
 Member #: 2028
 Postcount: 240

Strange, I expected to see a broad burn band across the entire centre of the screen.

This picture suggests sudden loss of vaccum, and/or a great lump of phosphor falling of the screen.

Either way, goodbye CRT.

(It's not the same TV, is it?)

 Return to top of page · Post #: 20 · Written at 8:54:44 AM on 29 December 2017.
Vintage Pete's avatar
 Location: Albury, NSW
 Member since 1 May 2016
 Member #: 1919
 Postcount: 1902

Hello mate,
I have no idea, Its photo I saw on the net and wondered whats happened to this CRt.

 Return to top of page · Post #: 21 · Written at 9:31:27 AM on 29 December 2017.
Ian Robertson's Gravatar
 Location: Belrose, NSW
 Member since 31 December 2015
 Member #: 1844
 Postcount: 1800

That's what happens when you break the neck of a CRT. The inrush of air blasts the aluminising and phosphor off the screen.

There's no way back from this, unless you can re-screen the tube and the neck cracks are contained. Not any more....

A screen burn caused by collapsed scan is often not visible until you light up the CRT with a raster. Then you will see it.

Also no way back.

If the Early Television Foundation museum in Columbus, Ohio ever get their act together they should be able to re-gun CRTs but there are no plans AFAIK to do re-screening, even though I believe they have the RACS plant to do it.

This is why it behoves us to look after the remaining working CRTs. 'Coz when they're gone, they're gone for all time.

 Return to top of page · Post #: 22 · Written at 3:36:09 PM on 29 December 2017.
Irext's avatar
 Location: Werribee South, VIC
 Member since 30 September 2016
 Member #: 1981
 Postcount: 377

That tube has definitely been necked. Back in the 70s as a radio apprentice we disposed of many old TV's and we always broke the exhaust tip of the neck of the tube for safety and that's exactly how the phosphor looked afterwards. Oh how I wish I had a few of the sets we junked back then now.

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