[Coco] again: CoCo RGB to VGA conversion

[jdaggett at gate.net]

Kevin

I would not recommend using 1 F caps other than for short term 
data retention in SRAMs. Maybe in very low frequency filters. Not in 
the Coco.

j ames


On 19 Aug 2004 at 9:38, Kevin Diggs wrote:

Date sent:      	Thu, 19 Aug 2004 09:38:35 -0700
From:           	Kevin Diggs <kevdig at hypersurf.com>
To:             	CoCoList for Color Computer Enthusiasts 
<coco at maltedmedia.com>
Subject:        	Re: [Coco] again: CoCo RGB to VGA 
conversion
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> Hi,
> 
>  But would it be enough to simulate the fuzziness of the CM-8?
> 
>      kevin
> 
> jdaggett at gate.net wrote:
> > RJRTTY 
> > 
> > A one farrad cap depending on voltage rating can be very small.
> > Pager designs that I did used a 0.22 F cap that was rated 3 VDC and
> > no biggfer than many hearing aid batteries. About 8 mm in diameter
> > and 4 mm thick. The company did have a 1 F at 2.5VDc that was about
> > the size of the large lithium coin cell batteries. (CR233?).
> > 
> > james
> > 
> > 
> > On 18 Aug 2004 at 23:23, RJRTTY at aol.com wrote:
> > 
> > From:           	RJRTTY at aol.com
> > Date sent:      	Wed, 18 Aug 2004 23:23:06 EDT
> > Subject:        	Re: [Coco] again: CoCo RGB to VGA 
> > conversion
> > To:             	coco at maltedmedia.com
> > Send reply to:  	CoCoList for Color Computer Enthusiasts 
> > <coco at maltedmedia.com>
> > 	<mailto:coco-
> > request at maltedmedia.com?subject=unsubscribe>
> > 	<mailto:coco-
> > request at maltedmedia.com?subject=subscribe>
> > 
> >>Friends
> >>
> >>      >I do agree that without special processing the display will
> >>      >look different from the CrapMaster-8. It would probably be
> >>      possible >to add some horizontal "fuzz" to more closely
> >>      simulate the CM-8
> >>
> >>
> >>     I think the term you are looking for is broadband noise which
> >>     can
> >>easily be introduced with the proper filtering.
> >>
> >>      >(perhaps adding a 1F capacitor to the output lines would
> >>      >match
> >>      the >CM-8). 
> >>
> >>
> >>     At the risk of sounding like a smart a** ,a one farad capacitor
> >>     would
> >>probably be about the size of a washing machine  :)
> >>
> >>    I am going to take a chance and purchase  the XRGB-2 Plus
> >>upscan converter.  I will report on my results when I try it
> >>with the coco3.
> >>
> >>Roy
> >>
> >>
> >>-- 
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> >>Coco at maltedmedia.com
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> > 
> > 
> > 
> > 
> 
> 
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