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Longhorn Engineer

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About Longhorn Engineer

  • Rank
    Dragonstomper
  • Birthday 10/07/1987

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  • Custom Status
    The Engineer of all things Awesome.
  • Gender
    Male
  • Location
    Austin, Tx
  • Interests
    Gaming, Sailing, Fishing, Hacking Consoles, Beer

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  1. Can you post some high resolution shots of the connections you made? I just sell PCBs to Joe but I am the one that designed the mod.
  2. I had the black and white issue when I got mine as well. I ended up having to touch up the soldering on one of the chips per LH's suggestion. It was the really tiny chip. I needed to reflow the solder. With my lousy hand steadiness, it was quite the chore. Hi all, I just purchased and installed my LHE video mod for the Atari 7800. Picture in the 7800 mode is clear albeit in black and white over S-video and composite. 2600 mode is scrambled and also in black and white. I've tried this on both my Westinghouse W4207 and a Dell FPD on both channels. I've done a pretty rigorous search on how to resolve this issue, but these posts are the closest I've come. I've checked all my connections—especially to pin 9 (chroma)—and even replaced a few wires. In 2600 mode, I adjusted the lower potentiometer and this helped the V-Hold, but the image is still off-center and black and white. Can anyone help me with this issue? I'm dying to play my ProSys in full color! Thanks! Sounds like the tiny chip in the bottom right corner is not working correctly. That chip passes the chroma signal. Thanks LHE! I found that post several pages back, and I do believe that's the problem. Since I purchased mine from electronicsentimentalities, I e-mailed him, and he's going to replace the board. I did attempt to reflow the solder on the little guy, but it just wasn't happening. Cheers to a fantastic design! Even in b/w it is remarkably crisp and sharp! No problem!
  3. I had the black and white issue when I got mine as well. I ended up having to touch up the soldering on one of the chips per LH's suggestion. It was the really tiny chip. I needed to reflow the solder. With my lousy hand steadiness, it was quite the chore. Hi all, I just purchased and installed my LHE video mod for the Atari 7800. Picture in the 7800 mode is clear albeit in black and white over S-video and composite. 2600 mode is scrambled and also in black and white. I've tried this on both my Westinghouse W4207 and a Dell FPD on both channels. I've done a pretty rigorous search on how to resolve this issue, but these posts are the closest I've come. I've checked all my connections—especially to pin 9 (chroma)—and even replaced a few wires. In 2600 mode, I adjusted the lower potentiometer and this helped the V-Hold, but the image is still off-center and black and white. Can anyone help me with this issue? I'm dying to play my ProSys in full color! Thanks! Sounds like the tiny chip in the bottom right corner is not working correctly. That chip passes the chroma signal.
  4. Just to update this, i have since received the mod so hopefully Longhorn is now uptodate. Awesome picture quality on S-video btw I am but I am not taking direct orders right now. I am selling bulk PCBs to people that want to sell mods however. I want to get back to selling them but I do not have time to assemble all those orders.
  5. Wouldn't surprise me if a connection on the cart slot got cracked.
  6. If you get me the schematic I'll give it a go, and let you know how it works. Nice to have 3rd party verification? Will once I make sure it doesnt blow up TVs or 5200's You have something against fireworks? I don't mind but I am sure people don't want there houses going down in a blaze of Atari glory.
  7. If you get me the schematic I'll give it a go, and let you know how it works. Nice to have 3rd party verification? Will once I make sure it doesnt blow up TVs or 5200's
  8. Why would any one flame you? And Yes there is a 5200 design but I am more focused on getting every one who has already ordered a mod out the door before even thinking about working on a new design. It is all designed and ready to go but I need to test it and finish up the PCB.
  9. I just ordered a small quantity of them...I'll repost when I know if it goes through or not. I wonder where they got 2500 of them? In December Fairchild (manufacture of the FMS6400) placed the FMS6400 on "last orders" then moved it to discontinued. I bet the 1500 chips where from an order then.
  10. http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=96763678&uq=634339569467237059 Should last quite awhile.
  11. 22AWG is used cause I can get 10 conductor wire (multi colors) for really cheap. 24AWG should be fine. Parker
  12. I would see what video options your TV has and try tweaking them. Or try adding the RF shielding back on. Your install looks correct. Parker
  13. The 2N3904 adds about a 22ns delay in the signal. Try buffering the COL signal as well. Parker
  14. The 10uF cap near the FMS6400 chip needs to be ceramic. Electrolytic caps won't be fast enough to do the job.
  15. Did you twist the red wire (ground) and the composite wire (yellow) together? Also could you email me some photos of the install along with with the lines on the TV? I am assuming your using a stock Atari power supply and a good composite cable. Parker
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