ACML Posted July 22, 2023 Share Posted July 22, 2023 (edited) I saw this posted on an Atari User website (I think Tim Kline's). I have accomplished the ClearPic2002 mod several times and have been very satisfied, but now there is this "revised" version that is of unknown origin to me. Did Bob Woolley revise this since 2002 or was it someone else's work? Regardless, has anyone tired this revised version? CLEARPIC2002 Mod 128.3 : 31:05:2002 Remove........Replace With R63...........1 ohm L15...........1 ohm C115..........1 ohm CR19..........leave blank R22...........leave blank C60...........leave blank R25...........75 ohms R28...........75 ohms R23...........130 ohms R24...........130 ohms C118..........leave blank C119..........leave blank Q8............leave blank C62...........68 pf R31...........1 ohm R38...........1000 ohms R27...........leave blank C63...........1000 pf R44...........47 ohms Add a wire from the junction of R27 and C61 to J2-5 (the empty pin on the video DIN connector) Revised Mod REMOVE:.......REPLACE WITH: C115--10uf....wire C60--100pf....leave blank R187--1meg....2.2K L15--820uh....wire R188--750.....680 CR19--1N4148..leave blank C119--3.9pf...leave blank C62--10pf.....wire R24--180......47 R23--180......47 Add a wire from R44 (either side) J2-5. Edited July 22, 2023 by ACML Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted July 22, 2023 Share Posted July 22, 2023 (edited) there were a series of these but normally they had revision numbers, years etc. I am certain you will find them in newsletters / magazine type stuff. So I'd say revisited and of course later discussions online lead to these. There were mentions of differences for different model Atari's as well. Super Video and Clear Pic went in sort of the same direction at some points (same goal) but I think Clear Pic versioning was by year later in life but Super Video stuck with revisioning numbers like 2.1 etc. Edited July 22, 2023 by _The Doctor__ Quote Link to comment Share on other sites More sharing options...
AA_ron Posted February 23 Share Posted February 23 On 7/22/2023 at 11:14 AM, ACML said: I saw this posted on an Atari User website (I think Tim Kline's). I have accomplished the ClearPic2002 mod several times and have been very satisfied, but now there is this "revised" version that is of unknown origin to me. Did Bob Woolley revise this since 2002 or was it someone else's work? Regardless, has anyone tired this revised version? CLEARPIC2002 Mod 128.3 : 31:05:2002 Remove........Replace With R63...........1 ohm L15...........1 ohm C115..........1 ohm CR19..........leave blank R22...........leave blank C60...........leave blank R25...........75 ohms R28...........75 ohms R23...........130 ohms R24...........130 ohms C118..........leave blank C119..........leave blank Q8............leave blank C62...........68 pf R31...........1 ohm R38...........1000 ohms R27...........leave blank C63...........1000 pf R44...........47 ohms Add a wire from the junction of R27 and C61 to J2-5 (the empty pin on the video DIN connector) Revised Mod REMOVE:.......REPLACE WITH: C115--10uf....wire C60--100pf....leave blank R187--1meg....2.2K L15--820uh....wire R188--750.....680 CR19--1N4148..leave blank C119--3.9pf...leave blank C62--10pf.....wire R24--180......47 R23--180......47 Add a wire from R44 (either side) J2-5. I tried the "Revised Mod" on my 1200XL, and it made my video worse. Screen was visible, but VERY prominent jail bars, and fuzzed chroma (colors) at the edges of the usable screen, and washed out overall. I checked & double checked, but it was correct and didn't work. It isn't even correct. I think the R188 listed as originally 750, was actually 920 (or 9 hundred something.. I verified it was meter, and research) No guiding photo, my C62 originally empty but said should have 10pf. Wire from R44, either side seemed sloppy since they weren't equivalent. Anyway, I've undone that and am right now applying the official 2002 listed above it. Quote Link to comment Share on other sites More sharing options...
+Larry Posted February 23 Share Posted February 23 I did both these mods quite a few years ago. IMO, a lot of work. Here is one that should get you 90% of the benefits with a whole lot less parts and work. At least it did for me... The revised was called Clearpic 2012, IIRC. Here is the earlier thread that discusses some options: Quote Link to comment Share on other sites More sharing options...
AA_ron Posted February 24 Share Posted February 24 22 hours ago, AA_ron said: I tried the "Revised Mod" on my 1200XL, and it made my video worse. Screen was visible, but VERY prominent jail bars, and fuzzed chroma (colors) at the edges of the usable screen, and washed out overall. I checked & double checked, but it was correct and didn't work. It isn't even correct. I think the R188 listed as originally 750, was actually 920 (or 9 hundred something.. I verified it was meter, and research) No guiding photo, my C62 originally empty but said should have 10pf. Wire from R44, either side seemed sloppy since they weren't equivalent. Anyway, I've undone that and am right now applying the official 2002 listed above it. This is where I first saw the revised version... labeled "ATARI 1200XL BAD VIDEO FIX" The additional text made it sound great. https://www.atarihq.com/atcomp/1200vid.html I finished the CLEARPIC2002 last night, and it is really nice in composite, and extremely sharp with S-Video, The S-Video does show faint jail bars (due to sharpness in solid uniform backgrounds), and I found that I could make them half-as-prominent by lifting the right side of C63. Cutting C63 on its way to R45 should prevent Luma/Chroma from improperly mingling, and some people have added a cutoff switch on the 800XL for this. I ended up leaving it alone since each tweak affects S-Video & Composite. http://retrobits.net/atari/clearpic.shtml Quote Link to comment Share on other sites More sharing options...
ACML Posted February 24 Author Share Posted February 24 2 hours ago, AA_ron said: The S-Video does show faint jail bars (due to sharpness in solid uniform backgrounds), and I found that I could make them half-as-prominent by lifting the right side of C63. I've noticed that a stock 1200XL has jail bars and it's there in the LUMA signal. That means the stock video circuit that does not have CHROMA connected to the monitor jack already has the jail bar effect in the B&W LUMA signal going to the monitor jack, so I don't think the ClearPic2002 mod introduced the jail bars as they were already there. Quote Link to comment Share on other sites More sharing options...
flashjazzcat Posted February 25 Share Posted February 25 Quite so. Even UAV-equipped 1200XLs are prone to jailbars. Quote Link to comment Share on other sites More sharing options...
Ricky Spanish Posted February 25 Share Posted February 25 I really don't notice much of anything. Unless I look super close. 1 Quote Link to comment Share on other sites More sharing options...
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