Narrow-Bandwidth Television Association

by **aussie_bloke** » Sat Jun 09, 2012 5:19 pm

Just been going through my 1935 Television Today book series and have found another example of a belt television receiver which uses one motorized sprocket pulley roller and two smaller pulley rollers and a roll of film, here is the pic below:

by **Panrock** » Sat Jun 09, 2012 8:12 pm

Hi aussie_bloke,

This looks a lovely elegant setup doesn't it? As others here have said though, the problem will be the sheer speed - and wear and tear - on the film. When in a 35mm camera or projector the film has moved by a complete frame, in NBTV it will have only moved by a line! Thirty (or sixty) times as much work for it to do! And then, because it is a loop, over and over again...

Steve

Website · by **Harry Dalek** » Sat Jun 09, 2012 8:51 pm

Hi troy

Heres another , i like that illustration of the film nipkow .

Least with all the problems with this must be one of the more interesting monitors to make you could get the parts from old 35mm cameras.
I think you could to get a roll of 35mm film 30 or 32 frames ,be the easiest way of doing this.

by **aussie_bloke** » Sun Jun 10, 2012 3:39 pm

Thanks for that illustration Harry. I actually have a roll of blank 35mm film somewhere in my collection, should I get a hold of junked film sprockets I will use it. I am more so opting to use more tougher materials for this project such as that paper cardboard material used for wrapping around transformer bobbins. But will see how I go, will have to opt for what's available and what I can easily get a hold of. Anyhow found yet another illustration of a belt receiver from an early 60s UK book called "A Beginner's Guide To Television" which I recently won off Ebay, here it is:

Website · by **Harry Dalek** » Sun Jun 10, 2012 6:39 pm

aussie_bloke wrote:Thanks for that illustration Harry. I actually have a roll of blank 35mm film somewhere in my collection, should I get a hold of junked film sprockets I will use it. I am more so opting to use more tougher materials for this project such as that paper cardboard material used for wrapping around transformer bobbins. But will see how I go, will have to opt for what's available and what I can easily get a hold of. Anyhow found yet another illustration of a belt receiver from an early 60s UK book called "A Beginner's Guide To Television" which I recently won off Ebay, here it is:

Pity a lot of the different monitors made theres only a drawing left.
Be nice if there were at least a photo.
Lets know how you go ,i think you can get belt sander belts different lengths
This one just about ready made to make a belt nipkow ad some holes and some luxeons + you can do some sandings at the same time :wink:

by **gary** » Sun Jun 10, 2012 6:44 pm

Well that's thinking "out side the box" Harry.

However I fear using sandpaper as the belt medium might result in "grainy" pictures...

by **Viewmaster** » Sun Jun 10, 2012 6:55 pm

Sync will be the problem....don't sink in the sand :shock:

by **gary** » Sun Jun 10, 2012 6:57 pm

Viewmaster wrote:Sync will be the problem....don't sink in the sand

and if it runs faster that 750 RPM it will be.... ?

Website · by **Harry Dalek** » Sun Jun 10, 2012 7:54 pm

gary wrote:
Viewmaster wrote:Sync will be the problem....don't sink in the sand

and if it runs faster that 750 RPM it will be.... ?

Hi Gary Albert this hand cranked one might slow it down ?

Jokes aside the belt sander might be a easy option for at least rollers and such ready made ...

by **gary** » Sun Jun 10, 2012 7:58 pm

harry dalek wrote:Hi Gary Albert this hand cranked one might slow it down ?

Well I would prefer "slow sand" to "quick sand" any old day...

harry dalek wrote:Jokes aside the belt sander might be a easy option for at least rollers and such ready made ...

Easy, but from my own experience, as I own one, expensive...

Website · by **Harry Dalek** » Sun Jun 10, 2012 8:16 pm

gary wrote:
Easy, but from my own experience, as I own one, expensive...

I mean second hand ...at our 2 reuse shops at the dump there are piles of old sanders ...i know Troy is near you i think he knows of the one in Kiama.
1 or 2 dollars for parts

Website · by **Harry Dalek** » Sun Jun 10, 2012 9:08 pm

I knew about this site for a while went looking for it again ,the fellow talks about using film nipkows for cameras which might be of interest.
http://www.myprius.co.za/nbtv_and_sstv.htm

by **gary** » Mon Jun 11, 2012 12:16 am

harry dalek wrote:I mean second hand ...at our 2 reuse shops at the dump there are piles of old sanders ...i know Troy is near you i think he knows of the one in Kiama.
1 or 2 dollars for parts

I must check these things out - nothing cheap around my parts I can tell you!

Website · by **Harry Dalek** » Wed Jun 13, 2012 3:33 pm

gary wrote:I must check these things out - nothing cheap around my parts I can tell you!

Ours must be good in that way .

If the belt sander is a problem perhaps looking into the belt its self ..we are talking pretty strong which it would have to be for both uses ,there are lots of different sizes and yes gary must get a fine grain one :wink:

The rollers i know old laser printers are good for these or some printers in general.

It will be interesting what troy comes up with .

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