CurtPalme.com Home Theater Forum

crt projectors · Joined: 03 Oct 2007 Posts: 39

yes, I'm looking for all possible image upgrades for my ancient beast shown in my avatar. This is rated at 1,000 line resolution, is there any HD unit OR is it possible if this has only one video input? DOES anyone have conversion lenses to a flat screen for either a novabeam or videobeam-to convert curved screen image to a image projected onto a flat screen. After market lenses and parts OK. (GAMMA, COLOR, & all other possible image processing uprgrades to video input). I want this used to it's full potential, at least with maxxing out 1000 line image.

Idea

**kal** · Posted: Tue Nov 18, 2008 4:53 pm Post subject:

The projector you have in your avatar doesn't do 1000 lines. It does 480i (480 lines) since it's video-only as it only has composite input (one cable). HD isn't possible.

See our "hooking it all up" FAQ: http://www.curtpalme.com/CRTPrimer_17.shtm

I wouldn't bother trying to upgrade it. *Any* projector off our best/worst list will look better. See: http://www.curtpalme.com/Projector_Rankings.shtm

Some of the lower end models you can essentially get for free as people are basically giving them away and even those will be light years better than what you have now.

Kal

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

Person99 · Joined: 09 Mar 2006 Posts: 4899 Location: Flower Mound, TX

Do NOT waste your time on this. It is completely pointless. Much, much, much, much, much, much...(you get the point) projectors both digital and CRT are available for under $500 these days.

**Curt Palme** · Posted: Tue Nov 18, 2008 5:26 pm Post subject:

I agree, there's really not much you can do to 'performance upgrade' this unit no matter what you do.

If you want to keep it running as an antique, then change all of the electrolytic capacitors in the set. Those usually die first.

To me though, if it works, leave it alone. Nothing like blowing perfectly working stuff up by doing mods. Been there, done that.

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Yeah, it's like spending money on a Model T to use as a daily commuter car. If you want to restore it as an antique, then fine, but if you want to watch movies, get a decent projector.

crt projectors · Joined: 03 Oct 2007 Posts: 39

Thanks for info, the primer link states a RGB composite broken into three can be 1080. maybe if this fed directly to all three colr circuits seperately, bypassing IF tuner and other. I really don't doubt the CRT max res. spec as they were accurate in its limitations and about it's overall design. Can Mr. Curt palme or other video Expert just PM me if this is possible.

Thanks

**kal** · Posted: Tue Nov 18, 2008 7:53 pm Post subject:

Person99 · Joined: 09 Mar 2006 Posts: 4899 Location: Flower Mound, TX

What Kal said.

MikeEby · Joined: 24 Jun 2007 Posts: 5237 Location: Osceola, Indiana

Don't forget about Curt's old idea of stacking two with a slight offset to fill in the scan lines....He was joking of course. Smile

Mike

ecrabb · Posted: Tue Nov 18, 2008 9:00 pm Post subject:

Guys, the "1000 lines" spec has nothing to do with vertical resolution, i.e. 480i.

"TV lines" or TVL was a spec common on sales literature of analog TV's in the 70's and 80's, where TV's often were touted with "900 lines" or "1000 lines" as in the case of the Kloss. TVL is actually more closely related to bandwidth. Here's a great article on TVL:

http://www.indigovision.com/whitepapers_resolutionandtvl.php

I have no idea how manufacturers of TV's with composite or even RF inputs could claim anything like they did... I imagine it was similar to peak lumens for CRT projectors in the 80's and 90's, audio amplifier power, and exactly like the silly contrast numbers touted in flat panel display literature now. 12,000:1. Yeah, right.

The bottom line is that the old Kloss is probably closer to 400 or even 300 TVL, regardless of what the brochure said. Even if you could engineer a way to feed a 1080i HD signal to the old Kloss, you'd be resolving less than 1/4 of the resolution contained in said source. It would be especially silly, given that for somewhere between $250 and FREE, you could find a used CRT projector that would display a FAR superior image in every way: brighter, sharper, and with better color and contrast.

SC

CIR Engineering · Posted: Tue Nov 18, 2008 10:19 pm Post subject:

Running this as an antique is one thing... but if you are going to do that you should not even consider modifying it Confused

It would be bizarre to actually use this projector as a projector when there are other free options out there that can honestly perform and put up a usable and decent image.

craigr

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

crt projectors · Joined: 03 Oct 2007 Posts: 39

Thanks for the clarification, I'll post the best screen shots possible when running. At this point to preserve what's left of these relics.

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

Tinman · Posted: Thu Nov 20, 2008 3:21 am Post subject:

Besides all the "no's" on that novabeam, it uses a curved screen so you can actually SEE an image. It's wayyy too dim on a flat screen.

I had one. Don't try it.

Marc