when is a Nipkow a fake ?

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when is a Nipkow a fake ?

Postby Harry Dalek » Tue Sep 06, 2016 11:39 pm

http://www.tvplayvideos.com/2,XSh6U4L0O ... pkows-Disk

MMMM picture always in sync any speed ...wider than the nipkow holes so on.
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Re: when is a Nipkow a fake ?

Postby DrZarkov » Sat Sep 10, 2016 5:13 pm

It looks like there is a picture behind a spinning Nipkow-disc to "simulate" TV.
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Re: when is a Nipkow a fake ?

Postby Harry Dalek » Sun Sep 11, 2016 12:02 am

DrZarkov wrote:It looks like there is a picture behind a spinning Nipkow-disc to "simulate" TV.


yes using a little tv or light box perhaps ...so really showing nothing like how a nipkow really works ...
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Re: when is a Nipkow a fake ?

Postby gary » Sun Sep 11, 2016 9:20 am

Harry Dalek wrote:
DrZarkov wrote:It looks like there is a picture behind a spinning Nipkow-disc to "simulate" TV.


yes using a little tv or light box perhaps ...so really showing nothing like how a nipkow really works ...


Actually Baird (or at least his co-workers) used the same technique either to test disks or to take photos. If I get time I will try to dig up a reference.

The give away here is that the picture remains stable even when the disk spins down.
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Re: when is a Nipkow a fake ?

Postby Harry Dalek » Sun Sep 11, 2016 5:49 pm

gary wrote:
Actually Baird (or at least his co-workers) used the same technique either to test disks or to take photos. If I get time I will try to dig up a reference.

The give away here is that the picture remains stable even when the disk spins down.



Yes Gary No sync needed at any speed pretty useful why didn't we think of it ? :lol:

I have not heard of this Baird test on photos Gary so i am interested if you track it down .
The electromagnetic spectrum has no theoretical limit at either end. If all the mass/energy in the Universe is considered a 'limit', then that would be the only real theoretical limit to the maximum frequency attainable.
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Re: when is a Nipkow a fake ?

Postby gary » Fri Oct 28, 2016 1:48 pm

Harry Dalek wrote:
gary wrote:
Actually Baird (or at least his co-workers) used the same technique either to test disks or to take photos. If I get time I will try to dig up a reference.

The give away here is that the picture remains stable even when the disk spins down.



Yes Gary No sync needed at any speed pretty useful why didn't we think of it ? :lol:

I have not heard of this Baird test on photos Gary so i am interested if you track it down .


I finally found it Harry, Vol 35 No.3 page nine (or Paganini if you are into classical music ;-).
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Re: when is a Nipkow a fake ?

Postby Viewmaster » Fri Oct 28, 2016 4:39 pm

There are many other examples on that site

http://www.tvplayvideos.com/2,yguYWDtOr ... ct-(Part-6)

Not a very successful demo!

Is he trying to use one of your apps, Gary?

Multi standard here.....
http://www.tvplayvideos.com/2,qwYiAJMnc ... recordings
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Re: when is a Nipkow a fake ?

Postby gary » Sun Oct 30, 2016 9:55 am

Viewmaster wrote:There are many other examples on that site

http://www.tvplayvideos.com/2,yguYWDtOr ... ct-(Part-6)

Not a very successful demo!

Is he trying to use one of your apps, Gary?

Multi standard here.....
http://www.tvplayvideos.com/2,qwYiAJMnc ... recordings


That "site" is just a collection of mostly unrelated videos "scraped" from various video media sites (mainly YouTube).

The videos you link to are part of this forum's AussieBloke projects which he documented extensively both on this forum, YouTube, and his own web site.

What you are seeing there is a stage in testing - something we all go through but rarely make public ;-).

Yes that is TBP app that he is using to monitor the output of the camera.

The main thing is that whilst the camera, at that stage, is probably not functioning as well as Troy would have liked, it is none-the-less *not* "fake" as was the example referred to in the title of this thread.
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Re: when is a Nipkow a fake ?

Postby McGee2021 » Sun Oct 30, 2016 10:52 am

gary wrote:
Harry Dalek wrote:
DrZarkov wrote:It looks like there is a picture behind a spinning Nipkow-disc to "simulate" TV.


yes using a little tv or light box perhaps ...so really showing nothing like how a nipkow really works ...


Actually Baird (or at least his co-workers) used the same technique either to test disks or to take photos. If I get time I will try to dig up a reference.

The give away here is that the picture remains stable even when the disk spins down.



Here is a page from Television For the Amateur Constructor, from 1933.
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John Logie Baird was obviously the man who sowed the seeds but did not reap the harvest.
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