[Coco] The chinese crt9128 works!

[mike delyea]

Just curious - this board doesn't require any shielding?  From memory,
didn't all the composite video hacks require shielding?


On Fri, Oct 18, 2013 at 9:56 PM, Luis Antoniosi (CoCoDemus) <
retrocanada76 at gmail.com> wrote:

> well it's an old prototype pak that i'm reproducing.
>
>
>
>
> On Fri, Oct 18, 2013 at 7:47 PM, chris <cralt at comcast.net> wrote:
>
> > Hello,
> >
> > I must have missed the other threads about this card.
> >
> > Is this a project you guys are building or is this an old card? What is
> > "osh park"?
> >
> > I have a coco2b and sIDE. I have a multi-pak on the way and would love to
> > be able to use my coco as an 80col terminal!
> >
> > Thanks,
> > -Chris
> >
> > On Oct 18, 2013, at 7:18 PM, Luis Antoniosi (CoCoDemus) wrote:
> >
> >  there is a mistake on the previous schematics I did. But the resistors
> are
> >> all used.
> >>
> >> There is one resistor under the RCA connector. In this pic you can see
> one
> >> of its end under the RCA:
> >>
> >> https://pbs.twimg.com/media/**BUpSDG7CQAAvxfJ.jpg:large<
> https://pbs.twimg.com/media/BUpSDG7CQAAvxfJ.jpg:large>
> >>
> >>
> >>
> >> On Fri, Oct 18, 2013 at 6:21 PM, Tormod Volden <lists.tormod at gmail.com
> >> >wrote:
> >>
> >>  On Fri, Oct 18, 2013 at 11:58 PM, Tormod Volden wrote:
> >>>
> >>>> On Fri, Oct 18, 2013 at 4:21 PM, Luis Antoniosi (CoCoDemus) wrote:
> >>>>
> >>>>> I will proceed with the prototype in wire-up and they I will make few
> >>>>>
> >>>> test
> >>>
> >>>> cards. I'll be putting the card on osh park in case you guys want to
> >>>>>
> >>>> make
> >>>
> >>>> your own.
> >>>>>
> >>>>
> >>>> Thanks for sharing this! Just looked at your design again. You are not
> >>>> hooking up the intensity signal (INTOUT, pin 8), isn't that missing an
> >>>> opportunity?
> >>>>
> >>>
> >>> On what do you base the choice of resistor values (22 and 25 Ohm) on
> >>> the output stage? The Disto design uses 470 Ohm to ground and 10 Ohm
> >>> in series. On your PHB board I think I can see 220 (or 330?) and 15
> >>> Ohm close to the output socket although I am not sure where in the
> >>> circuit they are.
> >>>
> >>> Tormod
> >>>
> >>> --
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> >>> Coco at maltedmedia.com
> >>> http://five.pairlist.net/**mailman/listinfo/coco<
> http://five.pairlist.net/mailman/listinfo/coco>
> >>>
> >>>
> >>
> >>
> >> --
> >> Long live the CoCo
> >>
> >> --
> >> Coco mailing list
> >> Coco at maltedmedia.com
> >> http://five.pairlist.net/**mailman/listinfo/coco<
> http://five.pairlist.net/mailman/listinfo/coco>
> >>
> >
> >
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
> > http://five.pairlist.net/**mailman/listinfo/coco<
> http://five.pairlist.net/mailman/listinfo/coco>
> >
>
>
>
> --
> Long live the CoCo
>
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>