CurtPalme.com Home Theater Forum

TailsFurse · Joined: 04 Feb 2015 Posts: 6 Location: Ohio

TLDR - Read last paragraph.

Hi there! TailsFurse here, with a Sony projector that doesn't seem to have to much documentation to it. The closest I can find is the VPH722. I assume there isn't to much of a difference between the two. Got this projector for 10 dollars (plus some good amount of shipping Laughing

) on eBay because it was labeled broken. Turned out it works fine! All tubes had 0 wear! So now my 10 dollar experiment with CRT Projectors, turned into something I can actually enjoy! Whoo!

About 8 years I have had this thing now, still working just as good as when I got it, with still no noticeable wear on any of the tubes. This site has helped me a lot understanding how it works, how to converge it, and even how to clean the CRT Fungus that appeared on the green tube. (That was scary reading how to do it, but actually doing it is easy!) Now comes the part I need your help.

On this projector there is three sets of inputs that I can see. VTR, Composite (BNC), and RGBhv (5 BNC).

Since getting this projector I have been using the Composite, since I have no understanding of the RGBhv or the VTR inputs.
I tried hooking the RGBhv up before via a computer VGA port, and I got something that looked like the desktop, but I couldn't figure out how to set the refresh and resolution to something the projector can actually display. Since the projector needs something along the lines of 25hz or 30hz at 720x576 or 720x480 to actually display anything.

I tried making a Component output from my laptop, and hook that up to the R G B inputs of the projector, and it worked, but only the green actually shows up. Read more info on this site and it says that is exactly what will happen, in: (FAQ: Hooking it all up). However, it was much clearer and MUCH sharper coming through that input, so now that I have gotten a taste of that, I want to actually get this hooked up right. I'm not all for HD, as I know this projector can not do HD, but an incredibly clearer SD picture, if possible, is something I would love to have.

So here is the question. Can I hook my laptop/desktop directly up to this projector with a VGA to RGBhv connection, if I can get the computer to Sync to the 25hz at 720x576 resolution, or do I have to get one of those transcoder boxes? Having a computer hooked directly to the projector would be a lot nicer. Thanks for any and all input, and thanks for a wonderful website!

-TailsFurse

**Curt Palme** · Posted: Thu Feb 05, 2015 2:31 am Post subject:

The 722 is a composite video only projector and cannot take an RGB signal unless it's 320x240 resolution. It dates from about 1986, when the RGB signals we know today didn't exist.

**Curt Palme** · Posted: Thu Feb 05, 2015 2:32 am Post subject:

Btw if you run a higher resolution signal into it, you likely will smoke the h output section of the projector.

**AnalogRocks** · Posted: Thu Feb 05, 2015 2:47 am Post subject:

Get your self an external Quad Decoder. They make a big difference in the picture quality. Then you can run Composite or S-video into the QuadDecoder and out to the projector via RGBHV at 480i.

Check out the Extron QSD 204 I have one and it's a nice unit.

Oh and you could do the reverse too:

Get an Extron VSC 500 or VSC 700 run RGBHV in from the PC and out to the projector via composite or S-video

OR buy one of each and have your own quasi-scaler set up.

PC--RGBHV--ExtronVSC--S-video---ExtronQSD----RGBHV---projector.

UncleWill · Posted: Thu Feb 05, 2015 5:48 am Post subject:

TailFurse, are you the same dude that posted the video of this model projector getting the tube glycol changed?

TailsFurse · Joined: 04 Feb 2015 Posts: 6 Location: Ohio

Thanks Curt and Analog! I certainly don't want to smoke anything! I think for the time being I'm going to keep away from hooking up anything to this to that input. Although I can't wait too. Or maybe get a higher def set. I see Curt sells a few at entry level prices. Love older tech, the older the cooler! Projectors like these are amazing! Thanks for reading and taking the time to respond. Notes have been taken, an' I might look into getting a decoder.

UncleWill, yuh, that's me. The insides of these machines are amazing! Courage the cowardly dog was a good test to show I guess. xD Hope the video wasn't to boring for ya!

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Does your sony have a connector like this on it?

TailsFurse · Joined: 04 Feb 2015 Posts: 6 Location: Ohio

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

I have one with the cable I could let you have cheap. But, just so you know, the only advantage it gives you is an S-Video connection. But the S-video does give a little clearer picture over composite. That is why I bought it way back when. Projector is long gone.

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Oh, by the way, It was for an add on controller, (VPR722), which is what I have.

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

the fact you held on to it amazes me Wink

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

TailsFurse · Joined: 04 Feb 2015 Posts: 6 Location: Ohio

**AnalogRocks** · Posted: Thu Feb 19, 2015 5:48 pm Post subject:

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

You also have to take into consideration the size of the image. Anomalies are more noticeable on larger images then small ones. Not that I'm trying to convince you to buy this VPR. I have little interest in getting involved in any part of selling it.

TailsFurse · Joined: 04 Feb 2015 Posts: 6 Location: Ohio

**Curt Palme** · Posted: Fri Feb 20, 2015 12:59 am Post subject:

Hey, 15 posts on a VPH 722 is about 13 too many ! Smile

900 does refer to 900 lines of resolution.. via the RGB inputs most likely, although I don't think the plastic lenses can reproduce that. New tubes probably could.

Back in the day before VGA, some computers circa 1985 or so could output composite video via RGB and many 'high end' video projectors had RGB inputs, but only for 320 X 240 resolution as I stated above. you can't find a current video card that would output that low.

Seriously, hunt around on Craigslist for a higher end CRT. I get emails weekly from people wanting to sell me mid grade data sets, and I tell them all to put them in the freebie section of CL. I can see you're hooked, now go get a better set! Smile

**Curt Palme** · Posted: Fri Feb 20, 2015 12:59 am Post subject:

Hey, 15 posts on a VPH 722 is about 13 too many ! Smile

900 does refer to 900 lines of resolution.. via the RGB inputs most likely, although I don't think the plastic lenses can reproduce that. New tubes probably could.

Back in the day before VGA, some computers circa 1985 or so could output composite video via RGB and many 'high end' video projectors had RGB inputs, but only for 320 X 240 resolution as I stated above. you can't find a current video card that would output that low.

Seriously, hunt around on Craigslist for a higher end CRT. I get emails weekly from people wanting to sell me mid grade data sets, and I tell them all to put them in the freebie section of CL. I can see you're hooked, now go get a better set! Smile

**AnalogRocks** · Posted: Fri Feb 20, 2015 1:05 am Post subject:

now 17 posts ;

TF, you may be able to do 320x240 to the projector from the 286. What is the output on the 286? It's been a few years but maybe I can help.

Also you may be able to convert 480i to 240p using an Extron Emotia box.

Read here: http://scanlines.hazard-city.de/

**AnalogRocks** · Posted: Fri Feb 20, 2015 2:48 pm Post subject: