[Coco] Coco 2 RF

[Mike Rowen]

Mark, some pics of your original board might be helpful. While I can build
and test this, my circuit analysis skills are shakey at best. It would be
great to establish a known working circuit. I'm willing to prototype it if
others will provide circuit guidance. Does anyone know if the originator of
this or other circuits are still out there to get their input or even
release their schematics? Also, I don't think anyone wants to step on
anyone's product rights. Thoughts anyone?

Cheers,
-Mike

On Tue, Feb 21, 2012 at 12:02 PM, gene heskett <gheskett at wdtv.com> wrote:

> On Tuesday, February 21, 2012 11:56:54 AM Mike Rowen did opine:
>
> > I'm intending to build and test this circuit on a CoCo 2 this weekend.
> > I'll post my results here to let you know if/how it works.
> >
> > Cheers,
> > -Mike
> >
> > ---------- Forwarded message ----------
> > From: Mark Ormond <markormond at mtxsystems.com>
> > Date: Tue, Feb 21, 2012 at 7:56 AM
> > Subject: Re: [Coco] Coco 2 RF
> > To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
> >
> >
> > I copied the board layout of one I have in mine. The copied schematic is
> > currently untested.
> > Why don't you try it and let me know if there are errors.
> > I can post pics of the original board also.
> >
> >
> > http://www.svfdtn.com/cbm/coco2comp.jpg
> >
> >
> >
> >  GND = GND
> >
> >  G = Pin 8 of MC1372P
> >
> >  Y = Y on Modulator
> >
> >  S = S on Modulator
> >
> >  R = Left side of C32 (Looking from front)
> >
> >
> >
> >  Later,
> >
> >  dabone
>
> Hi Guys;
>
> I looked at your schematic, but one thing I don't see is a src of bias
> drive for the bottom NTE123ap.  So that isn't going to do much unless that
> coupling capacitor comes from a positively biased point, and is a pretty
> leaky capacitor, something they are not supposed to do.
>
> Cheers, Gene
> --
> "There are four boxes to be used in defense of liberty:
>  soap, ballot, jury, and ammo. Please use in that order."
> -Ed Howdershelt (Author)
> My web page: <http://coyoteden.dyndns-free.com:85/gene>
> <joeyh> netgod: er, are these 2.2.0 packages 2.0.0pre9 or do you have a
>        direct line with the gods?
> <netgod> joeyh: i have the direct line
>
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