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Author Topic: New caps for a1200 mobo gives better picture quality?  (Read 4823 times)

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Offline Daedalus

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Re: New caps for a1200 mobo gives better picture quality?
« on: January 06, 2012, 12:20:01 AM »
Well, the accelerator shouldn't be having an effect on the picture at all, except for some tearing / glitching issues some people have with certain accelerator / motherboard combinations. Capacitors are quite a likely culprit - even if they haven't failed totally in the average quality one, they could still have degraded enough to cause poor signal quality. Or, one might have failed which wasn't critical, but just helped reduce noise or decouble or something. It's also possible that the power supply is causing a funny noise effect - I had that myself using a PicoPSU and cheap laptop charger. Changed to a better quality one and the picture was crystal clear. The original Amiga power supplies are getting old as well, and they also contain lots of capacitors for smoothing the power and eliminating noise.

Edit: Good point Bloodline, I guess different accelerators could be introducing noise in different ways which cause video issues... Would be interesting to swap them over, and the PSUs, and see if it's linked to either.
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Offline Daedalus

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Re: New caps for a1200 mobo gives better picture quality?
« Reply #1 on: January 06, 2012, 12:52:27 AM »
Quote from: Snoozy;674577
Hey Daedalus,

I am using the same a1200 PSU in both cases. Do you think the video/scart lead that amiga kit sell is worth upgrading to compared to my standard scart lead?


If you're using a composite cable (uses the yellow, white and red connectors) then an RGB cable will give you much better results. I'm pretty sure your TV would support RGB SCART, but might be an idea to check before you buy it. But yes, it makes a very big difference indeed compared to the composite type!
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Offline Daedalus

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Re: New caps for a1200 mobo gives better picture quality?
« Reply #2 on: January 11, 2012, 03:51:11 PM »
Well a CRT TV certainly is a big difference here (Man I wish I had a CRT HDTV, but those beasts are very rare these days!), but as Bloodline pointed out, the fact that you can see the pixels where they were blurred before is a sign of a much cleaner signal - it's closer to the "true" output of the Amiga. Maybe there are some settings on the TV for upscaling that might help, but when I'm on a flat panel TV I still prefer the sharp, clean RGB look to the blurry composite with washed-out colours... Horses for courses though, if you prefer the look of the old cable, you should be able to resell your cable without losing much money...
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