[anybody out there doing CRT widescreen conversions ? have a 2004 JVC AV-65wp74 that i converted to front projection . it had a cracked screen and fresnel so i decided one day to try a conversion . it turned out better than expected with a 84 inch dia 16-9 pic with the projector 47 from wall . the only thing i dont have is Keystone but have made the projector very low with the CRT mounted at the very top . making it easy to see over it when seated 4ft behind the projector. i had to a slant on the screen 1 inch to tame the keystone and the bottom of picture is only 2 inches off floor. the picture is very very brite. in fact it washes out the Optoma HD70 that it shares the screen with when its in eco mode ,any body out there know of a low cost keystone solution ? dont want spend big bucks on pro stuff and it would need DVI or component HD . also anybody have a line on deal on Digital proj DV-4 lamp . got lots of pics email me if want take a look . but since i dont have 5 post on this site i cant give email adress !so call me at 412-853-5142 and leave a message in box with your email and i will send the pics.

I think the projector you took out of the a RPTV is what it is, there is no way to do keystone unless you move the screen or the projector as the Mirror inside the set is at an angle. Youll have to do the same thing to physically correct it.........OR......You may be able to change the magnet settings on the CRT's to correct that. When I retubed my old SONY I remember that the magnents had something to do with raster squarness.

Also because its a RPTV projector there is really no way to know where the physical position of the projector shoul be for the projection offset. for most CRT projectors when ceiling mounted the bottom edge of the case ( mounted upside down ) is usually the same measurement as the top of the screen ( up from the floor ) so the lenses are a bit lower then the top screen edge. You may have the pJ a bit too high.

I did this a long time ago and ran it at 10 ft wide when doing front projection. :D

You might want to convert it to a bigger rear projection instead. That means the mirror needs to be put back on. That way you won't have to deal with flipping the image. Not to mention you get better ANSI contrast and ambient light iimprovement.

CRT HDTVs are TOO short throw to be used as front projection without keystone. The projector simply gets in the way. The only way I can think to make it work is to get the service menu codes and see if you can correct the image somehow that way.

Converting to rear projection is MUCH simpler. Build an inclusure with a screen painted flat black on the inside and you have an instant DIY rear projection home cinema.

dont really want to spend big bucks on a large rear projection screen . have a optoma hd70 in family room and have digital project DV4 that has its lamp running on fumes in basement home theater. _ was thinking a video card with DVI might have some video sizing and keystone or moire ,trapizoid.i know there is pro stuff out there but looking for a video card to used with media center computer to correct pic under $500 . do they exsist?

Big bucks? It cost me like $90-$100 (and I believe some can be had for less) for about a 9' wide by 87" high dark gray screen. lol. The only thing left to do would've been to simply build a large flat black painted enclosure to hold the screen and to block outside light. Cheap and easy.

a 80 in 16-9 screen with fresnel for $100? dont see it as possible ,what rear projection screen and lens combo that can be had for $100. a decent screen and fresnel for rear projection cost over 1k . the projector is not in the way when sitting up right 4 feet behind frojector . have kicked the size up to 90 in and moved the projector back to 50in behind screen and did some screen warping to tame keystone but can no longer use the DLP on the same screen. really have no problems with projector in line of site. even cut down the the cast alum housings that hold the guns to lens to get the extra 3/4 in. clearance. contrast and brghtness not issues at all . gave up on digital keystone for now as it looks really nice with out it .

You probably shouldn't "need" a fresnel if you keep the gain low enough. RPTVs require a fresnel badly because their gain is somewhere in the neighborhood of 4.0 or more so it can compete with sunlight and without that lens the center would be WAY brighter than the surrounding area (masssive hot spot caused by light escaping a high gain rear screen material at steep angles. They are less diffused). Some rear screens range from 0.8-1.8 gain or more and the lower ones diffuse the light more making brightness more even throughout.

My dark gray screen was 1.8 gain and only had a little minor color shift at the center that was mostly noticeable on the TV's option menu or on solid bright whites (and I may have been projecting on the wrong side at the time. I believe I was). Lower the gain to 1.3 or 1.0 and that diminishes even more. There was no big hot spot though like there would be if I removed the fresnel lense from the back of my RPTV's lenticular screen.

There's also the option for a DIY painted rear screen. One could paint their own or use a Goo Systems rear screen paint.

1.0-1.3 gain seems like a good fit for RP CRT.