Greg2600 Posted February 19, 2015 Share Posted February 19, 2015 Getting rid of the coupler and using the better quality coax will make the picture even better I just picked them up at RS ($7 for pair), and you're correct drastically better! On the CV as well. My other old systems no longer even have RF capabilities due to mods! Unfortunately still looks so dark and crappy on the Sony HDTV. This TV has such a bad upscaler I had to buy a professional one. So to play on there, I think I need the AV mod, although on the CRT the RF is fine now. There is a mod on ebay from turkey. Ships really fast. I've installed the one from Turkey too. Good results and far better sound than RF. It's still important to use a high quality video cable, even with this mod. Correct, RF sound stinks. I was going to get the one from Turkey, but was like, hey shouldn't I support an AA member first? 1 Quote Link to comment Share on other sites More sharing options...
mylok Posted February 19, 2015 Share Posted February 19, 2015 Just wanted to chime in. I sell modded Intellivision, Atari 5200, and Atari 7800 consoles on ebay (userid: glennfre). I make my own boards for the Intellivision's consoles and can provide composite A/V mod service, consoles or boards to anyone in need. I have attached 2 photos, a modded Intellivision board, and the homemade boards I make. I have not found a need to use printed boards for this simple setup (2 transistor,3 capacitor and 8 resistor circuit). I use quality parts from digikey so just message me if you want your system modded, want to purchase a already modded console, or just want the mod board. I have sold consoles to atariage forum members in the past so maybe they and vouch for me or you can check my ebay feedback. Thanks, Glenn 1 Quote Link to comment Share on other sites More sharing options...
Bill Loguidice Posted February 19, 2015 Share Posted February 19, 2015 If anyone is interested, I have a spare AV-modded Intellivision II complete with power supply and two working controllers that I can sell with or without an Intellivoice. It does have slight ghosting like all of the mods that I've personally ever seen. Offers via PM. Quote Link to comment Share on other sites More sharing options...
Crazy Climber Posted February 20, 2015 Share Posted February 20, 2015 I have one of myloks mods, its fantastic! Well worth it Quote Link to comment Share on other sites More sharing options...
juice2839 Posted February 21, 2015 Share Posted February 21, 2015 I also made a few nicely routed pcb's on my CNC and populated a mod kit for the INTY if anyone is interested. http://www.ebay.com/itm/181668487804?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 Quote Link to comment Share on other sites More sharing options...
First Spear Posted February 26, 2015 Share Posted February 26, 2015 What's new, is old. Or what's old is new. Or something like that. Check out this piece of paper I just found in my basement. I used to actually keep archival info on paper, imagine that.... 1 Quote Link to comment Share on other sites More sharing options...
7800fan Posted February 26, 2015 Share Posted February 26, 2015 Wow Cracker... the poster from hell person. Now that I haven't seen in oh about a decade when USENET was the social place to be in. Is he still around on any forum? Quote Link to comment Share on other sites More sharing options...
thecrypticodor Posted April 11, 2015 Share Posted April 11, 2015 (edited) I've noticed that the solarfox + shunt mod was a little dark on my CRT's, so I changed a couple of resistor values to mirror that of the easy 2600/7800 composite amp. The 1.6k to a 3.3k and the 2k to a 2.2k. This gave me a much brighter and sharper picture and reduced a lot of that smearing iesposta pointed out. Also if you use this on a HDTV that doesn't have a good noise reduction filter you'll need to wrap the video output a number of turns around a Ferrite Ring/Toroid. Here's a few LCD pics. Pretty damn good in my opinion. This is the last time I'm messing with this mod since I'm now satisfied with it. So here's my version of the schematic. Edited April 11, 2015 by thecrypticodor 2 Quote Link to comment Share on other sites More sharing options...
iesposta Posted April 11, 2015 Share Posted April 11, 2015 Thanks for revisiting this. I will definitely try the new values! (I still have it breadborded and not soldered together) I had stressed that a mylar capacitor to ground added to video out shifted the blue Shark Shark backgrnd to the correct blue, but your screen shot looks right on. Quote Link to comment Share on other sites More sharing options...
thecrypticodor Posted April 11, 2015 Share Posted April 11, 2015 Thanks for revisiting this. I will definitely try the new values! (I still have it breadborded and not soldered together) I had stressed that a mylar capacitor to ground added to video out shifted the blue Shark Shark backgrnd to the correct blue, but your screen shot looks right on. If your color hue is off on a model 1 you can adjust that variable capacitor on the motherboard to adjust the colorburst. However on the intellivision II it's a fixed capacitor so you'll need to replace it with either a trimmer cap or one of the value you'd like. Quote Link to comment Share on other sites More sharing options...
iesposta Posted April 13, 2015 Share Posted April 13, 2015 (edited) If your color hue is off on a model 1 you can adjust that variable capacitor on the motherboard to adjust the colorburst. However on the intellivision II it's a fixed capacitor so you'll need to replace it with either a trimmer cap or one of the value you'd like. This pink potentiometer in the center between the controller port and the rf box (which is mostly disconnected) changed the green-blue to sky blue on my Intellivision II. I do like your resistor value changes. It looks a bit better. I also dropped the Mylar cap to ground -- it seems a bit cleaner without it. All I had it there was for the shifting of the blue-green to more sky blue. I need to try it on the CRT next. Edited April 13, 2015 by iesposta Quote Link to comment Share on other sites More sharing options...
thecrypticodor Posted April 13, 2015 Share Posted April 13, 2015 This pink potentiometer in the center between the controller port and the rf box (which is mostly disconnected) changed the green-blue to sky blue on my Intellivision II. I do like your changes. I need to try it on the CRT next. image.jpg It's actually not a potentiometer its trimmer capacitor 5 to 50pf. My Intellivision II actually doesn't have one. There's only a fixed capacitor mounted under the crystal, I guess mine is a later board revision. In my case no adjustment was necessarily on my LCD but on my CRT greens were more brownish especially on tittle screens. Quote Link to comment Share on other sites More sharing options...
retrofixes Posted July 19, 2015 Share Posted July 19, 2015 (edited) So I have been reading up on these Composite Upgrades. I am a little confused with the 2 main Composite designs being used. We have SolarFox's and the version from Wiki. Which is the better circuit? Is there a clear Pros & Cons comparison? I hoping to upgrade my console but wish to learn from others before diving in. Thanks! Edited July 19, 2015 by retrofixes Quote Link to comment Share on other sites More sharing options...
xefned Posted February 7, 2016 Share Posted February 7, 2016 This is the last time I'm messing with this mod since I'm now satisfied with it. So here's my version of the schematic. Screenshot from 2015-04-11 08:59:07.png Hey Cryptic Odor, I'm curious if this will work with the RF modulator removed? I've stupidly already destroyed the RF box and I'm stuck with no pic at all. Thanks, Matthew Quote Link to comment Share on other sites More sharing options...
thecrypticodor Posted February 7, 2016 Share Posted February 7, 2016 Hey Cryptic Odor, I'm curious if this will work with the RF modulator removed? I've stupidly already destroyed the RF box and I'm stuck with no pic at all. Thanks, Matthew Yes 1 Quote Link to comment Share on other sites More sharing options...
juice2839 Posted February 7, 2016 Share Posted February 7, 2016 Yes I made some with smt and high quality PCB's.. http://www.ebay.com/itm/182012540398?ssPageName=STRK:MESELX:IT&_trksid=p3984.m1555.l2649 Quote Link to comment Share on other sites More sharing options...
thecrypticodor Posted February 7, 2016 Share Posted February 7, 2016 (edited) I've stupidly already destroyed the RF box and I'm stuck with no pic at all. Thanks, Matthew You can actually buy new modulator if all else fails. http://www.alltronics.com/cgi-bin/item/92V017/search/SFE-10.7MJ--RF-TV-Video-modulator Edited February 7, 2016 by thecrypticodor 1 Quote Link to comment Share on other sites More sharing options...
xefned Posted March 8, 2016 Share Posted March 8, 2016 Thanks for the help guys. I might actually buy that RF modulator if things get bad enough. I've been swapping out resistor values per the various schematics and getting different, albeit scrambled, pictures. Changing the 470R resistor to 1k actually gave me some picture where previously there was no synch. I'll try the trimpot method next and see if I can dial in working values. Thanks again! Quote Link to comment Share on other sites More sharing options...
adamchevy Posted October 26, 2017 Share Posted October 26, 2017 Does anyone offer a composite Intellivision mod that doesn’t have ghosting? If so I want that one! Quote Link to comment Share on other sites More sharing options...
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