Originally Posted by Curt Palme
Unlike digitals, CRTs are not limited to set resolutions. you need a data grade CRT though, as video only units will only project 480i, and computer resolutions are past that. The only limitation that data grade CRTs have is the max resolution you can feed it, but I don't think any of your sources will do higher than 720p, so you're fine that way with almost all data grade CRT projectors.
Also, some CRTs will only accept negatiive sync, and none of the later data grade CRTs will accept a TTL level input, so you need to make sure what you feed the set is at a video level (1Vp-p down to 0.7v p-p), and you will be fine.
Oh wow, first Bill Fitzmaurice, and now Curt Palme responds, this is so cool, AVSforum really is the place.
I know of both you guys from your websites and you under the book mark 'THE guy for CRT proj info' that i'd found so far even tho I haven't read enough of your site yet just marked for later.
To share a bit more info to help focus things:
I'm aware of the not limited to set resolutions bit, it's why i'm such a big fan of CRT's in general. The system i'm planning for the future is going to have a 36-40 inch direct view CRT (for daytime windows open watching, and things like video game light guns which just wont work otherwise) and then a pair of drop down screens in front of it (one for 2d, and one higher gain for 3d), which i'm planning to have both a CRT projector for as well as a DLP HD type projector. (eventually a 2160p one when they come out, which with pixel doubling and tripling will match pixel perfect any HD signal I feed it currently)
The job of the CRT projector will be for giving a nice big image to "any retro source I can think of" from SuperGun connected arcade boards (which can have oddities, like japanese shooters have things like 56hz, others push 53hz) to 16 bit computer era stuff, including some oddities like the Sharp X68000 which has a 1024x1024 square pixel mode on 31khz and eventually up to 2048x1536 on SVGA computer modes, with plenty of brightness would be ideal but I don't have to get there immediately, figuring out an upgrade path to go up in steps is allowable. I don't have a handy list but there's nonstandard modes (not mapped to SVGA) like Macintosh's 852x480 at 75hz, atari ST's 640x400 at 70hz (i think), amiga has a 1440x582 overscanned PAL-mode at 50hz plus some odd modes in general http://www.amigahistory.co.uk/resolute.html
- it's mostly important that the projector not lock into only CGA/EGA/VGA standard frequency. Approx budget i'm hoping to find something in maybe $300-500 for a projector range, more possible but would need a really compelling reason. Less is fine if something does everything I want for now, with plans to upgrade to top of the line later. (like a Cine 9) I don't have to hit every top res right away because although the higher resses are supported they are uncommon for games so even a 7 inch costing $150-200 maybe, just doing everything up to 40-50khz may be fine to start if there's a good deal. Next step for 62khz which I think is what the output of flicker fixers for AGA Amiga's at top res (rarely used in games so lower importance) ends up being. Just projecting from a CRT at all looks so much better for older content.
As an odd question, can a CRT projector be run on it's sideways/producing a vertically oriented "3:4" portrait image? : P I'm guessing no but just curious...
Whats the highest refresh rates a CRT projector can run, even if at lower resolutions, are they like CRT directviews that can run 100-120hz (for LCD shutter 3d)?
Originally Posted by draganm
post what city your in and we'll help you scour craigslist. Basically, any 8 inch EM focusing set will give you what you want and more with pretty darn good light output up to 92" wide screen. Electrohome marquee,sony G70 or 90,NEC PG or XG series (runco 980 and higher),all of these would be a good choice. Tube condition is critical though,don't buy burned tubes .(some light shading is OK).
If CL is a bust, check with Curt Plame for a warrantied machine or on Videogon.com
Thanks for the suggestion. What is special about 'EM focusing'? Do you think I be able to get a 'theater standard' (i'm told) 16 footlamberts at 92 inches without adding screen gain, or should the black level of CRT's let me get away with a bit of screen gain while still having an absolute blacker than black? Is Curt's list pretty much definitive or are there other projector makes of modern era out there?
I'm all over Minnesota and the eastern dakotas with regular driving, but i'm willing to travel out of area to pick up a machine if needed which also lets me personally inspect something. If cost for freight compares to gas on my economy car i'd rather drive. Willing to drive to chicago or des moines or rapid city or bismark for instance. I just don't want to drive 1000 miles and have it sold out from under me normally so wont craigslist too far away. Heck willing to drive out of the way to potentially much of the US during 2-3x a year usually in summertime road trips I take. And actually at the moment I wasn't looking to purchase immediately, I was hoping to educate myself a little more on understanding what is what and how to judge. Plus I might want to get three.
It's entirely plausible that if I go a little 'crazier' with my ideal setup I might be wanting three matching CRT projectors instead of one for a retro-triplehead gaming setup, and I want to know more about what potential additional issues might be caused by doing so, if any. I'm not seeking to spend thousands on edge matching software (i'm not that hardcore or wealthy, just passionate) but I may want to pick a projector that shows up more commonly/reliably on the market since the one to start would very likely become three, and if I ever had to replace one of the three to match models i'd want it to be not as hard. (whereas a single projector person could just change models if the original crapped out, i'd likely still have two still working ones) I've also no clue whether there's any projectors more suited to multiprojector situations (geometry adjustment near corners maybe?) but i'm curious whats out there.