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Vintage Television and Video Vintage television and video equipment, programmes, VCRs etc.

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Old 3rd Oct 2019, 9:38 pm   #1
farvis liam
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Default 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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Old 7th Oct 2019, 9:35 pm   #2
FERNSEH
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Default Re: Nera Projection Television

Some information about NERA projection TVs
http://www.thevalvepage.com/tvmanu/nera/nera.htm

DFWB.
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Old 8th Oct 2019, 10:42 pm   #3
simpsons
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Default 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
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Old 9th Oct 2019, 10:08 pm   #4
FERNSEH
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Default 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.

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Old 11th Oct 2019, 7:43 pm   #5
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Default Re: Nera Projection Television

I'm going to guess David. Could it be something to stabilize the focus? John.
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Old 11th Oct 2019, 8:04 pm   #6
FERNSEH
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Default 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.

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