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Marquee dynamic stig VS. 6-pole flare rings

643 Views 17 Replies 7 Participants Last post by tse, Dec 29, 2005

draganm

Discussion Starter · Dec 27, 2005

I did a stig + flare adjustment on an 8110 last night. If your not familiar, the 8110 comes stock with 6-pole flare rings and no dynamic stig circuit. Prior to this I had done a few 8500's with the stig circuit + the stock 2-pole rings. I must say, the "manual" method on the 8110 is a lot easier to do. All you have to do is ramp focus up and down to get iether rings (stig) or dots +rings (flare), no entering the Util. menu, pass-code, Stig menu and back again.

Also from the perespective of the results achived, the 6 pole rings gave excellent results, nice round rings everywehere on the screen. As opposed to the stock 8500 circuit which usually leaves some guitar-pick shaped circles somewhere on the screen.

what gives, is dynamic stig circuit just a marketing tool?

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1 - 18 of 18 Posts

draganm

Discussion Starter · #2 · Dec 28, 2005

I can't believe no one has a comment on this? If your running a pre-ultra 9500 this affects you as well. i'm saying the stock stig circuit on the pre Ultra 8500/9500's is CRAP, or has no -one here gotten that far in their set-up skills? Hello Spikolli, anyobody, anybody?

Tim in Phoenix

· #3 · Dec 28, 2005

Say Dragan

The triangular dots are an issue not solveable with zone stig, only the six-pole yoke addresses that; triangular dots could be a focus yoke issue or the gun itself on a given tube, I have not had the spare time lately to determine which. Passive stig adjust by magnet rings does not let you correct just the sides or corners which zone does allow for.

draganm

Discussion Starter · #4 · Dec 28, 2005

thanks Tim, I hadn't considered the ability to do different zones with the dynamic stig circuit. I have seen the triangle sahpes even on new panny tubes, so it might be the focus coil? I see now why the new Ultra's have both dynamic stig and 6-pole manets, your covered no matter what kind of anomloy the stig adjustment might throw at you.

ChrisWiggles

· #5 · Dec 28, 2005

IMO, I think it's odd that most stock marquee only come with 2-pole magnet adjustments. Seems like a miniscule thing to have at least 2/4 rings on there.

cmjohnson

· #6 · Dec 28, 2005

MOST of the Marquees I've owned came with 2-pole and 4-pole rings on them. The 8110 Plus came with 2, 4, and 6 pole magnets. Only two 8500s were equipped with flare only rings.

My own suggestion is, if you have anything BUT the 2,4,6 pole full set, take them off,

throw them in the trash can, and order new 2,4,6 pole ring sets from VDC Display Systems,

Canaveral, FL.

I would not use any other ring combination on one of my own projectors.

The more work can be done with the rings, the less work has to be done electronically.

Simple reason.

CJ

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secstate

· #7 · Dec 28, 2005

Quote:

Originally Posted by cmjohnson
My own suggestion is, if you have anything BUT the 2,4,6 pole full set, take them off,

throw them in the trash can, and order new 2,4,6 pole ring sets from VDC Display Systems,

Canaveral, FL.

CJ

Are they selling them again? There was post a year or so ago that claimed you couldn't order them anymore. I would love to get a set for my Barco.

I had a VDC rebuild, no longer in the projector, that had a triangular spot. It wasn't the focus coil because the same focus coil on a new P16 produced nice round dots. BTW the zone astig on Barco isn't any better at dealing with triangular dots.

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ChrisWiggles

· #8 · Dec 28, 2005

I think someone just mentioned it in another thread (maybe it was you CJ) that the rings were like $40 or so each? Or total, or something like that. Curious what the cost is from VDC.

cmjohnson

· #9 · Dec 29, 2005

If I remember right, they told me about 45 bucks each.

CJ

draganm

Discussion Starter · #10 · Dec 29, 2005

well $135. for 3 rings ain't exactly cheap, but nothings too good for my baby

The beauty of Marquee's is no matter what you put in your 8500 it will all swap over to your 9500LC dream machine one day.

BTW Chrsi, all 2 dozen or so 8500's I've seen had the 2 pole rings stock. the 8000's had 4 pole, and the 2 8110's had the 6-pole. So even a set of rings from an old 8000 would be an upgrade to an 8500.

tse

· #11 · Dec 29, 2005

Electrohome shipped projectors with all the different combinations of rings. VDC only ships with the 2, 4, 6 pole sets. That's all that is available nowadays. Not sure that VDC will sell them as they are getting harder and harder to get.

Ok, if your projector has dynamic stig capability you don't necessarily need the four and six pole sets. The dynamic circuit is capable of adjusting the stig correction in the middle of the picture. It does use a tiny bit of power to do that, though.

If your dots are round in the center you don't need the six pole mags. If they are triangular then you will need them for best focus.

A wild ass guess is that about 1/4 or less of the CRTs (I think it is the CRT) will end up with triangular, guitar pick, shaped spots in the center. The six pole mags will help you here but if they are in the corner(s) the neck mags do you no good.

So, do not despair. Odds are that you won't need the full sets and if you do probably one set will be enough.

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draganm

Discussion Starter · #12 · Dec 29, 2005

"Not sure that VDC will sell them as they are getting harder and harder to get. " how can you not be sure, I thought you were and em-ploy-ee ? The triangle shapes are usually on the sides in my expereince. I think I could use zone to make the center guitar pik shaped as well, and then use the 2-4-6 rings to make them ALL round at the same time. What-ya think, have I had a stroke of genius here or am I just stroking it?

cmjohnson

· #13 · Dec 29, 2005

It has occurred to me that there's no reason that a spare set of rings couldn't be degaussed and then re-magnetized as 6-pole magnets. First run them through a degaussing coil, and then place six small pairs of strong disc magnets on your pair of rings to be repurposed. Place them evenly and set up so that each alternating pair of magnets is in opposite polarity to the next pair. Let them sit for a while, (maybe a few days) and then carefully remove the

disc pairs, being careful to pull them straight away and not slide them around the ring at all.

I think this would work. Install the remagnetized rings in a test magnet group and see what happens.

Paint the tabs in a distinctive color so you know which rings you remagnetized.

CJ

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tse

· #14 · Dec 29, 2005

Quote:

Originally Posted by cmjohnson
It has occurred to me that there's no reason that a spare set of rings couldn't be degaussed and then re-magnetized as 6-pole magnets. First run them through a degaussing coil, and then place six small pairs of strong disc magnets on your pair of rings to be repurposed. Place them evenly and set up so that each alternating pair of magnets is in opposite polarity to the next pair. Let them sit for a while, (maybe a few days) and then carefully remove the

disc pairs, being careful to pull them straight away and not slide them around the ring at all.

I think this would work. Install the remagnetized rings in a test magnet group and see what happens.

Paint the tabs in a distinctive color so you know which rings you remagnetized.

CJ

Another good idea. Why wouldn't that work? The rings look like they are the same material all the way around. The company that originally made them had a way to magnetize them in six poles. There's gotta be a way.

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cmjohnson

· #15 · Dec 29, 2005

I think it wouldn't be that tough a project to machine out a pair of magnet holder rings for the disc magnets, which you'd just put the magnet ring set in between, and then close the holder and let the magnets magnetize the rings for a while.

I've been toying with the idea of making such a device. It doesn't seem too tough.

CJ

tse

· #16 · Dec 29, 2005

Quote:

Originally Posted by draganm
"Not sure that VDC will sell them as they are getting harder and harder to get. " how can you not be sure, I thought you were and em-ploy-ee ? The triangle shapes are usually on the sides in my expereince. I think I could use zone to make the center guitar pik shaped as well, and then use the 2-4-6 rings to make them ALL round at the same time. What-ya think, have I had a stroke of genius here or am I just stroking it?

Yeah, I think you're getting close to the short strokes, now.

Sorry, I couldn't resist.

The dynamic four pole mags are made at 45 degrees from each other. The six pole mags are two groups of magnets made 120 degrees from each other.

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4

Curt Palme

· #17 · Dec 29, 2005

I think this post makes cm the true Frankenstein doctor of the forum..

A bit of more info for the 6 pole magnet. NEC says to look at the TOP of the dot pattern and use the 6 pole to make the dots as round as possible from a triangle, don't use the middle. I would assume you could apply the same to the Marquee.

tse

· #18 · Dec 29, 2005

Interesting tid-bit. Next chance that I get I'm gonna try that out. They've always been adjusted in the center with the Marquee, AFAIK.

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