CurtPalme.com Home Theater Forum

[kitty666cats]

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Hi folks! Long time lurker, first time poster.

I've visited this board MANY times over the past couple years, always ogling the late Kim Beumer's awesome looking transcoders and what-have-you. A terrible shame that he passed before his time, those transcoders all look SO very well-built, the image shift and gamma adjusment options are a real nice touch. There's still quite a lot of RGB<->YPbPr transcoders being made nowadays thanks to the uprise in 'playing retro games on CRTs in RGB', but nothing looks like it quite compares to the stuff he had made. I have a Kramer FC-14 and it's wonderful, and I have a X-Vue Gamma Boost which is also wonderful. But I'd be elated if I could ever get my hands on some old Crescendo gear! The BUF2000 is what I am most interested in (it seems similar to the X-Vue Gamma Boost, only many more cool features and support for component[?])

Glad to join and being chatting more with all you folks! I'm a direct-view CRT fella, myself, but I intend to get a CRT projector someday - right now I have but a simple Optoma DLP. My CRT monitor is quite nice though - one of those beastly 4:3 Sampos that can display legit 720p & has monstrous speakers/subwoofer. My friend helped me modify the 15kHz input daughterboard for 15kHz RGBS, as well! We based the project upon this person's prior mod on the same monitor:

http://mikejmoffitt.com/articles/0051-nettv-rgb.html

The only difference is that we opted for 4 BNC connectors for RGBS rather than a DE15 connector

https://www.instagram.com/p/CDC5iLOFzD3/

^ there's a shot of it displaying some wonderful 1024x768 RGBHV

https://www.instagram.com/p/CDCjoozFyNw/

^ there is the bumpin' speakers I mentioned

https://www.instagram.com/p/CBt_As8FkYQ/
https://www.instagram.com/p/CBrrZFPlsBe/
^ and here's two links showing off the wonderful 15kHz '240p' RGBS! The first of these last two links is a gallery


Cheers!

~ Mike

[gjaky]

Not sure about your intent. But if you look at the BUF2000 manual you can see it does not do true gamma correction, it basically modifies the black level point. A techically correct single adjustment RGB gamma correction (in analogue domain) requires 6 (high quality) analog multipliers which is expensive and takes space.
Also here the YPrPb transcoder is most probably done with a single target chip (to fit the small case), most likely a TI part, which is BTW good, but definitely not something that can't be reproduced.

[kitty666cats]

No need for a BUF2000 anymore (got a X-Vue Box 1020 for cheapo) but still very interested in any & all old CS devices anyone may have a spare of