This may not be a bad idea. Something like a scandoubler/deinterlacer which is useful not only for Amiga but for other games/computers might sell enough to get the production cost down.

Look at this (TrueView 5700):
http://www.tvia.com/index.cfm?page=body&crid=16

From the information given I think it needs an SDRAM chip and a microcontroller or something to go along with it.

P.S. while we're at it I would like to see a memory board that plugs into both A2630 or Zorro3 and has either SIMM sockets, DIMM sockets, or 8MB of SRAM (zero waitstates)

I've been looking for one for a week with no luck.  Also, this doesn't fix the flicker... which is just as bad on LCD monitors as it is on a regular monitor.

There is one small problem you are overlooking, have you tried to purchase a 23-way PCB mound d-type recently?

I have found 23 way solder bucket connectors which could be used but having a cable would bump up the production costs.

The problem with getting hold of the chips seems to be the most problematic:( They arent cheap if you only want like 100+

I was thinking that maybe one could do a software scandoubler flickerfixer. Begause the rgb port of the Amiga outputs digital color signal. Maybe one could do a pci card that takes this colors and saves then i a buffer and then you write a scandoubler flickerfixer that takes the buffer and display them on your PC monitor. This would maybe be the chepeast way (most people already has a PC) but one would have to have a pc,mac, Aos4 or Pegasos computer besides your Amiga.

This is what most video card do. But video cards mostly takes composite signal which gives rise to signal degradation. And the digital analog conversion from tv video card also degrades the signal.

With a software one could do whatever you wanted with the signal. Most of the source code one could take from Mplayer or vlc.
 
Cheers

Yeah but wont those chip have the 8:4:4 problem?? CV64 scan doubler has that problem to (i think). Also you need to convert the analog signal then scandouble flickerfix, then reconvert to analog again. All these steps degrades the image

Converting from analog to digital, as I see it, is unnecessary... There ARE digital output lines already. Pins:

6 - Digital Intensity
7 - Digital Red
8 - Digital Green
9 - Digital Blue
13 - Digital Ground

I do like the looks of that TrueView 5700 chip... Question is, how much do they cost? Might be a simple matter of a voltage regulator circuit, one of these chips, a memory chip for buffer and appropriate connectors. Hmm...

Or perhaps the Averlogic AL250
http://www.averlogic.com/video_converter/AL250.html

If one wanted to use a PC to do the job, one might as well get a TV tuner card since those are pretty cheap on ebay. It would be nice if there was one with RGB input though, anyone know if such a thing exists?

Any "flicker fixer" needs to have enough RAM to buffer the whole display, close to 1MB at 24bpp (well I guess a clever device could get away with only a little more than half that much RAM, buffering only the previous field and previous scanline). I wonder if the Averlogic chip has enough RAM on it to do this.

One could use the digital video signals at the video slot instead of converting A->D but that would limit the systems that you could use the device with.

Maybe designing the logic from the ground up would be the way to go? Maybe someone who knows more than I do can help me out with this...

1) First thing needed would be a set of ADCs for the RGB input (minimum 16bpp but preferably 24-bit)
2) some logic that can sample the input at 14.3MHz (28.6MHz if we need super hires ECS modes...) and generate the proper addresses to write the data to odd/even lines of a framebuffer in RAM (720x480... unless we need extra lines for PAL or super hires again)
3) set of DACs for VGA output
4) logic to generate sync for VGA output, and count addresses for reading the output data from the framebuffer
5) memory that can handle this bandwidth... (dual-ported SRAM??)