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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc. |
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3rd Oct 2019, 9:38 pm | #1 |
Retired Dormant Member
Join Date: Oct 2019
Location: Pfungstadt, Germany
Posts: 1
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Nera Projection Television
Hallo from Farvis TV Museum Germany. We are restoring a Nera C30 Projection Television.We desperately need circut data or a chat with someone that has this set. I am new to this forum . If anyone needs any info on German TVs or Cameras I will do my best to help. wish you all a nice evening.
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7th Oct 2019, 9:35 pm | #2 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Nera Projection Television
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8th Oct 2019, 10:42 pm | #3 |
Octode
Join Date: Feb 2007
Location: Harrow, London, UK.
Posts: 1,493
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Re: Nera Projection Television
Perhaps slightly off topic, in 1980 Mitsubishi used the clever idea of having the image reflected back onto a fixed focal length screen in their 50" colour projection TV. Sony did the same the following year. I have no idea if Mitsubishi re invented the wheel, so to speak, or .....they too came across the Nera design!
Chris |
9th Oct 2019, 10:08 pm | #4 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Nera Projection Television
Chassis layout of the NERA C30. Everything looks fairly straight forward. In the event of timebase failure the receiver does have protection for the CRT.
Item 7: thermistor compensating unit. What's that all about? EHT generation will be from the 25KV Philips unit. The optics will also be Philips. DFWB. |
11th Oct 2019, 7:43 pm | #5 |
Dekatron
Join Date: Jun 2005
Location: Warnham, West Sussex. 10 miles south of DORKING.
Posts: 9,147
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Re: Nera Projection Television
I'm going to guess David. Could it be something to stabilize the focus? John.
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11th Oct 2019, 8:04 pm | #6 |
Dekatron
Join Date: Mar 2005
Location: Gateshead, Tyne and Wear, UK.
Posts: 7,444
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Re: Nera Projection Television
"I'm going to guess David. Could it be something to stabilize the focus?"
Hi John, You could well be right because there is no indication of a focus stabiliser valve which was usually an EL41 power pentode. The set does have a CRT protection valve but it's impossible to tell what type of valve was employed. DFWB. |