King of Dirt
n00b
- Joined
- Mar 28, 2020
- Posts
- 20
EDIT: Got the issue resolved, see second post if interested.
Well, I got around to working on the RGB bypass for my revision 3-5 AES over the weekend, and I wrapped it up this morning. I used instructions found here to build a video amp with a THS7316 chip; I've used these in my N64 with good results and I had some sitting around so I figured why not? I got the board all wired up with the amp and got it installed in the AES.
When I fired it up through the OSSC, I wasn't too impressed with the results. I had to tweak the LPF for the sync and the video in, but after that I was basically stuck with the jailbars yet again. Here's a pic (sorry about the quality).
It's hard to make out from the picture, but the jail bars are very pronounced now; however, it's mainly in any areas where there's a solid black backdrop (such as a title screen, like in the pic). There's also a strange reddish tint in the jail bars.
Here are a few pics of the RGB amp installed in the AES and the amp itself:
Amp installed in the AES.
Detail of the amp board.
Anyone have any ideas what might be causing this? I pored over the amp schematics and build, so I'm 99.9% certain that it's not to blame. Would a "standard" RGB bypass have better results in this scenario (something like Xian Xi did over on his JNX page)? I'm not a complete videophile and I don't demand utmost perfection from the video output (which is why the THS7316 amp might be a bit overkill), but I *would* like to eliminate the jail bars from the signal and get a solid RGB output from the console.
Any insight or help would be greatly appreciated. Thanks in advance!
Well, I got around to working on the RGB bypass for my revision 3-5 AES over the weekend, and I wrapped it up this morning. I used instructions found here to build a video amp with a THS7316 chip; I've used these in my N64 with good results and I had some sitting around so I figured why not? I got the board all wired up with the amp and got it installed in the AES.
When I fired it up through the OSSC, I wasn't too impressed with the results. I had to tweak the LPF for the sync and the video in, but after that I was basically stuck with the jailbars yet again. Here's a pic (sorry about the quality).
It's hard to make out from the picture, but the jail bars are very pronounced now; however, it's mainly in any areas where there's a solid black backdrop (such as a title screen, like in the pic). There's also a strange reddish tint in the jail bars.
Here are a few pics of the RGB amp installed in the AES and the amp itself:
Amp installed in the AES.
Detail of the amp board.
Anyone have any ideas what might be causing this? I pored over the amp schematics and build, so I'm 99.9% certain that it's not to blame. Would a "standard" RGB bypass have better results in this scenario (something like Xian Xi did over on his JNX page)? I'm not a complete videophile and I don't demand utmost perfection from the video output (which is why the THS7316 amp might be a bit overkill), but I *would* like to eliminate the jail bars from the signal and get a solid RGB output from the console.
Any insight or help would be greatly appreciated. Thanks in advance!
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