CurtPalme.com Home Theater Forum

ecrabb

OK, so I saw Jeremy's new avatar... This:

I'd never seen it before, so I googled it and came upon this thread on a Netherlands site:
http://www.gloeidraad.nl/radioforum/index.php?id=115113

Google Translate to English:
http://translate.google.com/translate?sl=nl&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fwww.gloeidraad.nl%2Fradioforum%2Findex.php%3Fid%3D115113&act=url

One of the posts links to this page, with a great YouTube video, where he spent a thousand hours getting it running:
http://www.earlytelevision.org/dalto_projection.html

Lots of cool info on this page:
http://www.myvintagetv.com/amphion_600.htm

One of the other posts links to this awesome PDF:
http://www.marcelstvmuseum.com/folders/Philips%20EL%205795%20large%20screen%20colour%20projector.pdf

It's a brochure from 1969 for a giant Philips projector. The interesting thing to me was that there was info on a big airline flight simulator. It used a moving camera set over a model on a motorized gantry, and then fed the video output to the big Philips projector. Holy sh*t! The lens/CRT assemblies are 470x940mm (or 18.5" x 37"). Those are bigger than beer kegs!

I remember my grandfather had a much smaller, but similar setup in his FBO in the late-70's. I remember a physical model map with grass, hills, trees, and houses, and a camera that "flew" around the map. I don't remember what the display looked like or how it worked, but I remember I was never allowed to touch it because you could literally "fly" the camera right into the model and break stuff. I think it was pretty obsolete by the late-70's, so I'm guessing it was from the 60's.

Maybe I missed it, but I hadn't seen any posts on these giant projectors, so I thought I'd post.

Cheers,
SC

**AnalogRocks** · Posted: Wed Oct 02, 2013 2:27 pm Post subject:

Wondered when somebody would notice Wink

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Dang

That was an actual projector? Thought it was a photoshop gag at first..........

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

I like how the one asks , What is the Mean Time Between failures(MTBF) of this thing? lol

I picture Tim, Curt and Scott all working on it. That be something. lol Very Happy

Nashou

CIR Engineering · Posted: Wed Oct 02, 2013 3:43 pm Post subject:

Yeah, I thought the pic was a mock up. I didn't realize that it is real.

Cool.

craigr

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

Now imagine that stacked.

Francisco · Joined: 05 Apr 2007 Posts: 305 Location: The Netherlands

I think those machines would give a lot of X-rays

Wouldn't like to sit on row under this PJ as shown on picture

CIR Engineering · Posted: Wed Oct 02, 2013 8:33 pm Post subject:

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

if you watch the video the guy spent 1000 hours fixing it with no lead shielding, he jokes about how he is still alive. I guess there was a lead barrier that went with the unit to protect the audience.

nashou

ecrabb · Posted: Wed Oct 02, 2013 9:12 pm Post subject:

I read on one of those pages that the case was lined with light lead shielding... That was back then when the standards were much lower, so if they thought it needed lead shielding back then, then it's pretty safe to assume there was a pretty healthy dose of stray x-ray radiation emitted from a machine like that.

SC

**AnalogRocks** · Posted: Wed Oct 02, 2013 11:13 pm Post subject:

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

Holy sh*t I have always wondered if it were true(had been told wise tales about such a projector just never knew such a beast was real )

Now I know

Talk about a killer projector though (in more ways then one) I find the x ray and cancer link a bit hard to believe but then again it wasn't "normal" sized tubes that he worked around but that would cream any thing put up to compare

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

I have my pj bared and naked with only the lead shields on at the moment. My head is literally like a feet and a half in between. Even so, I'm not bothered by the noise. I sometimes do, but only when thinking about it. Well, the seller told me it was sound-modded, but that has got to be a lie, because it's in fact not modded. Unless self-made from the inside. The fans looks like stock from the outside, and yet not bothered by the sound at all.

Now, the weird thing is that I'm seeing green goblins on the wall..

**AnalogRocks** · Posted: Fri Oct 04, 2013 10:24 pm Post subject:

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

I should build me a west and just be done with it. I'll start sewing tomorrow. Thanks! Smile

the big E · Joined: 20 Apr 2013 Posts: 1928 Location: speedwell Tn.

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

It's a bare 9500LC naked.. I haven't done the magnets fully so it's been that way for some time. Figured the shield would stray away from the goblins. But, nahh.. they all around me. Haunting me.

thewolfman · Joined: 28 Mar 2011 Posts: 1311 Location: Sweden

Alright. Time for a nap - or a movie. Thanks.

CIR Engineering · Posted: Fri Oct 04, 2013 11:04 pm Post subject: