CurtPalme.com Home Theater Forum

tse · Joined: 03 May 2006 Posts: 1014 Location: Sweatbucket, Fl.

Be glad that our projectors don't have to do the calagraphic light points like raster/cal simulator projectors do. Ours use resonant scan circuits for horizontal and efficient flyback generator circuits for vertical deflection. The raster/cal type have to use brute force deflection. Check this single color (drives one yoke) deflection amplifier running full output (16 Amp peak to peak deflection current). One 50V power supply for +50V rail at >4.5A, one 50V power supply for -50V rail at >4.5A. That baby is blowing out >450W of heat. Feels pretty good right about now.

Scott

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Must feel strange having to have the heat on down there in sweatbucket. Heard its suppose to be 80 in a few days. Better hurry up and finish that project.

emdawgz1 · Joined: 14 Mar 2006 Posts: 7949

It's 21degrees F outside right now... Crying or Very sad

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

ESCP projector, right? Yeah, I got the impression that they crank out the heat when I saw the heat sinking on each channel's drive amplifier.

I wonder what the typical cost of an ESCP is to the customer? If it's less than 60,000 dollars, I'd be surprised. How's tube life on them?

CJ

Shoujiki · Posted: Tue Jan 12, 2010 9:39 pm Post subject:

21F! I wish i was there. It was 116F here yesterday!

Spanky Ham · Joined: 22 Mar 2006 Posts: 5643 Location: Comedy Central

Kurt,
Maybe I reading the wrong thing, but I just checked and I saw a high of 107F. That is still hot, but your humidity was low. It looks like you are fine now with an 80F range. Having spent time at 29 Palms, I thought 100 with no humidity wasn't to bad. 120F was pretty hot, though. Smile

Scott,
Is this going to be part of the tour when I swing by VDC the next time? Smile

ecrabb · Posted: Wed Jan 13, 2010 10:42 pm Post subject:

I've always been fascinated with the calligraphic/vectorscope stuff... I've always loved the vector look... The super-sharp lines and lack of pixels was always fascinating to me. So, did some the vectorscope arcade machines like Star Wars, Battlezone, and Asteroids need big giant power supplies like this one, or this because it's for a super-bright, tightly-controlled projection tube?

SC

tse · Joined: 03 May 2006 Posts: 1014 Location: Sweatbucket, Fl.

I don't know if the games use this technology. It would probably be too expensive.

The projector uses regular Pany tubes, LCPs or Lugs.

Calagraphic mode is generally just used to make the real intense light points like you see at the airports. The background picture is raster scanned just like regular CRT projectors. During the vertical retrace the calagraphic mode is used to draw the light points. The deflection amplifier moves the cut-off spot to the light position, stops moving the spot, then turns on the beam for a short time. That is how they get the intense spots. Scary, stay too long on the light point and burn the phosphor.

Scott

km987654 · Posted: Thu Jan 14, 2010 2:29 am Post subject:

jask · Joined: 17 Mar 2006 Posts: 10187 Location: kamloops BC

Damn!! how much does that thing weigh?

Shoujiki · Posted: Thu Jan 14, 2010 12:57 pm Post subject:

Spanky Ham, our temps here were 45c + 80%> humidity! We had thunder clouds rolling in and rain one night, then back to 40 again the next day before the cool change came through. You sweat just sitting there! Horrible.