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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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9th Nov 2019, 1:31 pm | #21 |
Hexode
Join Date: Jan 2007
Location: Beckenham, London, UK.
Posts: 373
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Re: Early Decca CTV 25.
No it is not the case that you need heated cathodes to produce X-rays, and many of the early X-ray tubes were 'cold cathode'. See for instance https://www.orau.org/ptp/collection/...thoderound.htm
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9th Nov 2019, 1:32 pm | #22 |
Dekatron
Join Date: Aug 2013
Location: Wigan, Greater Manchester, UK.
Posts: 9,427
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Re: Early Decca CTV 25.
Thanks for the information Glyn.
We sold few Bush CTV25’s and those were the early ones. The picture on the Pye/Ekco we thought was much better so we concentrated on those although we didn’t sell many of those.
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Frank |
9th Nov 2019, 5:38 pm | #23 |
Dekatron
Join Date: Apr 2005
Location: North Wales, UK.
Posts: 6,884
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Re: Early Decca CTV 25.
Agreed - the Bush CTV25/167 didn't produce the best pictures - the reds seemed brick coloured for some reason. Although the Pye chassis became poorer as cost-cutting took effect in the Seventies, the original dual-standard and early 691 series gave very good results as did the Decca in this post, despite being a bit engineer hostile with its short interconnecting leads.
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