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A/V mod for Interton/Voltmace/Radofin 1292?


3 replies to this topic

#1 Thorsten GŁnther OFFLINE  

Thorsten GŁnther

    Dragonstomper

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Posted Fri Jul 23, 2010 2:26 PM

As the Interton VC4000 was my first console, I recently re-acquired one with several games. But I am unable to mod it for AV out instead of RF despite having found the full diagrams (I'm simply too stupid to invent a circuit myself, all I can do is try and copy it once I see it).

Here's the diagrams, can anyone tell me what to do to get a composite picture with this info?

Thorsten

#2 5-11under OFFLINE  

5-11under

    River Patroller

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  • Location:Ontario, Canada

Posted Fri Jul 23, 2010 6:50 PM

Hi Thorsten,

It looks like the video chip, the TEA1002 takes in RGB and Sync, and outputs composite video. Take your choice which one you'd prefer. You may need to buffer the outputs, so they'll provide a bit more power. Maybe someone could help with an easy transistor or LM318 circuit... similar to the mods for other consoles.

Good luck,
5-11under

#3 Thorsten GŁnther OFFLINE  

Thorsten GŁnther

    Dragonstomper

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  • 903 posts
  • Location:Wedel, Germany

Posted Sat Jul 24, 2010 2:51 PM

It looks like the video chip, the TEA1002 takes in RGB and Sync, and outputs composite video. Take your choice which one you'd prefer. You may need to buffer the outputs, so they'll provide a bit more power. Maybe someone could help with an easy transistor or LM318 circuit... similar to the mods for other consoles.


On version 2, yes - the video circuit is done in discrete parts on the version 1 and of course the Grundig version is an entirely different beast (but that version of the console is scarce anyway since it plugged into a special RGB port only found on ancient Grundig TV sets).

IMHO composite will be fully sufficient - these old consoles' video doesn't have that much to gain from RGB (as opposed to higher resolution computers like the Atari ST and Amiga - composite is much worse than RGB esp. in 80 column modes on these machines).

Yes, I am mainly searching for a buffer circuit to have standard voltage for the composite line. For audio, a protective capacitor should suffice - as on the VCS.

BTW, this family of consoles was also sold "down under", e.g. as the "Fountain Force 2".

Thorsten

#4 arcaderistismania OFFLINE  

arcaderistismania

    Combat Commando

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  • Location:Turkey

Posted Sat Feb 18, 2012 5:56 PM

I've just done the mod both to the v1 and v2. It's pretty simple. Just desolder the RF box and pull audio and video from its legs. It doesn't need any amp and has great audio and video quality. Good luck..




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