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Atari 400 A/V mod


xrbrevin

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12 hours ago, Colleton said:

Gave it a shot today, sadly my results aren't anything as nice as xrbrevin's were.

 

The Basic/Memo Pad background is zig-zag striped and is very washed out and pale.  Game graphics look correct, but are much paler than they should be. 

 

The resistors and the cap are installed correctly (I tried it with and without the cap), and I used an old USB cable as well.  I don't know what I'm doing wrong.  Only thing I can think is that I need more than 75 ohms at the luma pick-up point?

 

Any thoughts would be appreciated.

 

 

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Curious to know what the issue is.  My 800 with Incognito was like that and since I didn't have time to diagnose it before attending VCFMW, I installed the super colour card in it which fixed it.

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On 4/2/2020 at 8:15 AM, Stephen said:

Curious to know what the issue is.

We may never know.  I decided that 3 working S-Video 48K 400s was enough, so I removed the resistors and wiring, reassembled the 400 and put it away for another day.

 

It works fine with the RF Modulator, so I'm happy.

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