Multi-standard 3 spiral Nipkow disc televisor

Forum for discussion of narrow-bandwidth mechanical television

Moderators: Steve Anderson, Dave Moll, Andrew Davie

Postby Steve Anderson » Sat Aug 04, 2012 1:31 pm

Steve, I share your sentiments and have mentioned this a number of times in the past. Those with the luxury of a multi-Mbps connection wouldn't even notice the download time, here in this third-world country this whole thread loads in 2-3 seconds...one of the few things they've got right here.

For those running a screen resolution of 1024x768 in 4:3 I keep mine to a maximum of 750 pixels wide, I doubt many are using a lower resolution these days. If you are let us know.

To re-size multi-MB pictures that come out of the camera I use Irfanview (Google it) it's free and for simple operations like cropping and re-sizing it's ideal and fast. (Windoze only though).

Also within Irfanview you can set the degree of compression which they call 'Quality', a setting of 80% is fine.

There is also the issue of server storage space so select pictures carefully as if it were to be published in a magazine or the NBTVA newsletter.

Dave has already made a posting in the Admin/Mod area to which I have responded.

Steve A.
Last edited by Steve Anderson on Sat Aug 04, 2012 1:47 pm, edited 1 time in total.
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Postby aussie_bloke » Sat Aug 04, 2012 1:40 pm

Okay I have now compressed all my images to sizes under 100kb with minimal visible quality loss, so they will all load quicker, let me know if you's can now easily view this thread.
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Postby Panrock » Sat Aug 04, 2012 7:06 pm

Thanks mate. :) As regards my word 'concise', (in my personal opinion) if you to be were more selective in the pictures you post, that might make your story even more engaging, like a well-edited print article. Keep up the good NBTV work!

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Postby aussie_bloke » Sun Aug 05, 2012 11:48 am

Panrock wrote:Thanks mate. :) As regards my word 'concise', (in my personal opinion) if you to be were more selective in the pictures you post, that might make your story even more engaging, like a well-edited print article. Keep up the good NBTV work!

Steve O


Glad they load more easily now! :) I will be more selective in future posts.
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Postby Steve Anderson » Sun Aug 05, 2012 5:51 pm

Thanks for the understanding Troy, there are a few still on dial-up so for them it can be a painfully slow process. If I recall correct the fastest dial-up connection was 57kb/s or about 6kBytes/sec. Most analogue modems had/have some in-built compression but it's redundant when sending an already compressed file like a jpg.

A 100kB file at 6kB/s will take about 17 seconds to come through, 20 of them over five minutes! As we all did some time ago we all learned to live with this. In some places even DSL can be limited to sub-Mb/s rates, in some towns here 128kbs is all you can get, that will surely change in time though.

Here in Bangers you can get a Gbs connection if you don't mind paying for it (I do) but 10Mbs is all I need, it's the girls that use most of that bandwidth, not me.

Anyway, let's continue on with the thread subject....

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Postby gary » Sun Aug 05, 2012 6:50 pm

Hey Troy! It's just those pesky pommies whinging - I reckon you should double the size of your photos and refuse to reduce them until they agree to post more pictures of this years NBTV convention! mwahahaha ;-)
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Postby Harry Dalek » Mon Aug 06, 2012 4:27 pm

gary wrote:Hey Troy! It's just those pesky pommies whinging - I reckon you should double the size of your photos and refuse to reduce them until they agree to post more pictures of this years NBTV convention! mwahahaha ;-)


Aussie aussie aussie oye oye oye how about one better move the next convention to Tasmania or the forum gos ,wheres Andrew !

I have not really had much trouble with the image size and i have a dreadful speed when the teenagers in this house use up the fast internet ,i suppose i just put up with it for a week or two till we get it back.

Great project Troy i don't think there are many monitors like this i really like the build ...did a great job on converting that draw thing ..i think i would of stuffed up cutting out those monitor slots .

Doing a 3 in one great idea...
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Postby aussie_bloke » Sun Aug 12, 2012 9:03 pm

Ok everyone, I have been working on the front cover with magnifiers for this multi-standard Nipkow televisor. I have used a plywood board and cut two rectangular holes in similar fashion to the back board holding the LED light sources but a bit bigger.

For the magnification, I bought two el cheapo magnifying glasses which whilst not heaps magnifying they are adequate enough at a bit of a distance. To get the max magnification I had to use some protrusions to hold the magnifying glasses at a good distance so I got two used plastic yoghurt containers and cut the bottoms out and spraypainted them black and then cut the handles off the magnifying glasses and glued the magnifying glasses inside them which to my luck fit like a glove!:) I then glued the magnifying glass assemblies to the front cover over the holes and also nailed/glued some wooden supports underneath so they magnifying glass assemblies don't fall off under the weight of the magnifying glasses.

I then screwed the board to the Nipkow disc enclosure. On testing the pictures do come up bigger and better and more recognizable and clearer being in darkness!!!:D As mentioned I wasn't precise enough with drilling the holes into the record Nipkow disc so the scan lines are unevenly spaced and some even look to be missing, but am anticipating on making another Nipkow disc once I get this TV perfected enough. I am still yet to get some off screen shots due to phone camera's poor sensitivity to dim light but will do when I do telerecordings with my super sensitive Panasonic CCD camera.

Anyhow here below are pics of the construction work as described:
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Postby aussie_bloke » Mon Aug 13, 2012 1:46 am

I have now done a telerecording of my multistandard Nipkow disc televisor in operation on all 6 modes feeding each with appropriate standard video signals and my camera has once again done a good job of telerecording it all in sharp quality!:D

I have taken some photosnaps off my TV screen of the telerecording as I'm playing it back to immediately show how the pictures look so here they are:
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Postby aussie_bloke » Tue Aug 14, 2012 12:10 pm

G'day all.

I have just uploaded an uncut full telerecording of my multistandard televisor in operation:
http://www.youtube.com/watch?v=qwYiAJMnc8c

The beginning is an introduction which I did on my mobile phone camera. Then it's about 1 hours worth of uncut telerecordings for all scanning standards and orientations with various videos of 60 line, 32 line wide, 30 line TeKaDe for horizontal, then Baird 30 line, NBTV 32 line and 60 line (sideways) for vertical. Then to finish off the video I give a tour of this multistandard mechanical televisor and ramble on about its parts.

So enjoy!:D

Also stay tuned for a 25 part series on the construction of this set up to what it currently is at present!
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Postby aussie_bloke » Thu Aug 16, 2012 1:34 pm

G'day all.

I have now uploaded my 25 part video series on the construction of my multi-standard Nipkow disc televisor, I couldn't be bothered posting all 25 links so here's the link to my channel where you can view them:
http://www.youtube.com/user/troysvisualarts/videos
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Postby Metallica Man X » Fri Aug 17, 2012 7:09 pm

Dang! I've been gone too long...missed a bit lol.

I feel sorry for the LP......but then....what it became is far cooler 8)
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Postby aussie_bloke » Sat Aug 18, 2012 3:00 pm

Metallica Man X wrote:Dang! I've been gone too long...missed a bit lol.

I feel sorry for the LP......but then....what it became is far cooler 8)


Haha :lol: the LP was "The King & I" soundtrack and was scratched to the shithouse so it's good as drilled anyhow which is why I used it, I never will ruin a perfectly good record, not even a good condition Kamahl record! :lol: Yep that record certainly fairs better to displaying pictures than giving a scratchy skipping sound on a turntable! :wink:
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