Anything into coaxial input?

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npseaver
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Anything into coaxial input?

Post by npseaver » Mon Feb 19, 2018 3:50 pm

I've got a spare little CRT TV with a coaxial input on the back, and I wanted to find a (cheap) little video synth device to plug into it for fun. Not looking for anything especially fancy, and the little gizmos my searching has been turning up seem to be mostly discontinued. So a couple questions for the pros here:

1. What's your favorite stand-alone, cheap video synth gizmo?
2. Is it possible to find something that could output into a standard coaxial cable input, or do I need to also get a converter (like this, maybe)?

Thanks!

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nerdware
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Post by nerdware » Mon Feb 19, 2018 6:14 pm

Is this a composite input or for a TV antenna? If it's the latter, then yes, you will need an RF modulator. Otherwise, the simple answer is no.

So, with or without an RF modulator, you're talking about a device that outputs a composite signal. If you can afford a Vidiot, I'd say get that. If not, don't worry. There are a lot of cheaper options. Much, much cheaper options. Of course, they don't do the same thing. E.g. one of my cheapest signal generators is a VGA downscaler that can output test patterns when there's no input. On its own, this isn't very interesting, but it was definitely cheap. Even new, it would've been a lot cheaper than a Vidiot. Now I think about it, that would be a great addon for a Vidiot...

Anyway. The cheapest device I can recommend is a simple CCTV camera with composite out. Point it at the CRT screen for video feedback fun. For more fun, add a video mixer between the CRT and camera. You can then apply whatever effects the mixer has. Add a second camera and mix with the first. Cheap CCTV cameras can be found new almost anywhere, but cheap video mixers can be found on ebay. Add more mixers and more devices...like that downscaler I mentioned above. Everything adds to the fun. Different mixers can have different characters. Cameras, too. It's all good and often, particularly when second hand, very cheap.
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ebbflo
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Post by ebbflo » Mon Feb 19, 2018 6:54 pm

these are currently sold out but I think they are awesome

http://gieskes.nl/visual-equipment/?fil ... latoscope1

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npseaver
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Post by npseaver » Mon Feb 19, 2018 8:06 pm

This is super helpful. I figure the coax input must be for an antenna, though it doesn't say (I've never used the TV, except as decoration).

And yeah, I'm looking for something a bit more on the cheap and set it and forget it side of things than the Vidiot (though I hadn't seen that before and it looks like it would be a lot of fun to play with!). The CCTV feedback loop setup also sounds fun.

I really was into what I could find of the Critter and Guitari cellular automata synth, but that seems impossible to find now... But things of that sort are what I was angling for.

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Post by Agawell » Tue Feb 20, 2018 2:50 am

Theres a new critter and guittari video synth, but it’s hdmi

The diy one above is called chav... there are also simple diy mixers and switchers out there

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ume pop
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Post by ume pop » Wed Aug 29, 2018 1:16 pm

I´m working with modules most from doepfer to produce soundscapes - and also flickering trinitrons. For now I´m not using videomodules, but what I get from the audiomodules is amacing. The "dirt-filter" from synthrotek is good to produce horizontal lines from white to red in different sizes. The A-180 from doepfer you can use as a passiv mixer of signals, the A-138 more sufisticated, but dvd-signals are losing the color - could also be nice. The A-137-2 is doing great unsharp lines.

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Post by destroythings » Thu Aug 30, 2018 4:35 am

If you can find a Critter & Guitari Videoscope it could be the perfect thing.

http://www.analoguehaven.com/critterand ... ideoscope/

maggan
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Post by maggan » Thu Aug 30, 2018 11:02 am

Arent these NTSC? If user is in frankfurt it might be PAL?
destroythings wrote:If you can find a Critter & Guitari Videoscope it could be the perfect thing.

http://www.analoguehaven.com/critterand ... ideoscope/

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nerdware
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Post by nerdware » Thu Aug 30, 2018 11:20 am

You can use cheap converters to turn NTSC into PAL. Not great converters, but easily good enough for something like a Videoscope. For example: PAL/NTSC/SECAM to PAL/NTSC Mini Bi-directional TV System Converter Switcher.
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