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Definitive 7800 composite mod guide?


VicViper

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  • 1 year later...

If you're handy with veroboard and don't mind tackling a more intensive mod (ie, this isn't for novices), here's ours. It's mainly for PAL machines, but there's one for the NTSC ones also toward the end of the doc (page 8 onwards).

 

AntiJackModDocV3-4.pdf

 

On the AIO mods you can get composite by simply combining the Luma+Sync and Chroma S-Video outs. Though if you have the ability to use S, it's much more preferable.

Edited by juansolo
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OK, finally finished up the mod I did ages ago...  ;-)

What did I need to finish?

Well, I didn't have a 3D printer back then, so the 3 RCA jacks (Yeah, I went for 3 and mirrored left/right audio; it's been good for me for years) were just help in place with a piece of plastic I had cut and drilled some holes into... ;-)

But a while ago after I got my 3D Printer, I found this:

https://www.thingiverse.com/thing:4235463

It is for 2 RCA jacks and says no cut, but I had already cut (sorry.. it was a long time ago), so I just modded it a bit for 3 RCA jacks and finally got around to printing and installing it....

Went easier than I had thought.

The two holes at the back, that matched up to the two holes that used to hold the RF case in place, instead of using two screws, I used a thick piece of wire, ran it thru the holes and soldered it in.  Held great.

One plus (other than looking much nicer than my cheapo cut plastic) is that there is a screw in the case where my middle RCA jack is, and with my original mod, the RCA jacks stuck out pretty far and that screw was barely accessible...

The new mod had the RCA jacks recessed, so access to that case screw is perfect.

51827605303_e8eb16b656_z.jpg7800 RCA jacks by Desi Villaescusa, on Flickr

Edited by desiv
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On 1/13/2022 at 5:14 PM, juansolo said:

If you're handy with veroboard and don't mind tackling a more intensive mod (ie, this isn't for novices), here's ours. It's mainly for PAL machines, but there's one for the NTSC ones also toward the end of the doc (page 8 onwards).

 

On the AIO mods you can get composite by simply combining the Luma+Sync and Chroma S-Video outs. Though if you have the ability to use S, it's much more preferable.

Error in that doc (fairly major one...) now fixed.

AntiJackModDocV3-5.pdf

Edited by juansolo
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