CurtPalme.com Home Theater Forum

[Curt Palme]

I got an email today from a customer in the Norfolk, Va area that has eight Marquee 8500/Ultras used for 3D applications with P43 green tubes. He's complaining of poor focus, wants a bit more 'snap' out of the image.

From the emails, I don't think there's a projector problem per se, I'd say that it's more a setup/astig issue.

I need someone that can do a service call and full setup on these sets. Mike Parker? Terry?

Email me at curtpalme@shaw.ca.

For this one, we need more than the casual user that will do a tweak for a couple of cases of beer..

[Curt Palme]

I got an email today from a customer in the Norfolk, Va area that has eight Marquee 8500/Ultras used for 3D applications with P43 green tubes. He's complaining of poor focus, wants a bit more 'snap' out of the image.

From the emails, I don't think there's a projector problem per se, I'd say that it's more a setup/astig issue.

I need someone that can do a service call and full setup on these sets. Mike Parker? Terry?

Email me at curtpalme@shaw.ca.

For this one, we need more than the casual user that will do a tweak for a couple of cases of beer..

[Ohmess]

Hey Curt -- I'm not your guy for this one, but I'm workin on becoming the Virginia casual user that will do a tweak for a couple of cases of beer.

[Tim in Phoenix]

Guys!


That is typical of P43, it has maybe 20% less output and a pastel tendency, so do not expect to tweak it to regular 8500 performance.


.

[zGman]

Well, I have recently tested a PT22-30, which I understand to have the P43 phosphor.
Certainly the focus was comparable to the P19LUG, and I didn't experience issues
with color balance or output either, using the colorfacts gear. So I have been wondering
why Tim has had a different experience? Admittedly - I was not going for a full-on setup -
just checking out tubes down in the shop. But from what I saw, I don't mind using it at all.
G

[Chuchuf]

I am traveling in TX doing setups right now and returning to Altanta this weekend.
I can certainly be available for this next week if these folks want a pro setup.
You or they can call me at 404-557-6351 or email to terfer@comcast.net.
I can't email out right now so I can't email you on this.

Thanks,

Terry

[Tim in Phoenix]

[zGman]

Hi Tim,

Actually I still had the clear c-element installed (barco housing) - so that may have
increased output somewhat. I took a spectrum (i think) and planned to compare
it to a normal LUG and then the PT22-30 with the grn c-element - but as always
ran out of time for more testing.

I have wondered if you had some data on the P43 spectral output, and whether
your experience indicates the output would be lower solely due to the shorter
persistance, or a less efficient phosphor overall?

I have thought that the P43 might give better contrast running 72Hz, which
is one reason I wanted to try it in my next machine.

Any more experience or tech info you can share on this would be much
appreciated and an interesting subject - for me at least...

Thanks,
Galen

[Chuchuf]

OK since the cat has been let out of the hat...........
This P43 stuff not being good for HT is an old wives tale from my experiences.
I actually perfer the P43 G tubes for a few reasons.
First they focus better than the regular tubes.
Next I believe they produce a better cleaner picture because of the fast persistance.
And of course going to 72 hz refresh is where these tubes really shine. If fact I have wondered if the "softness of 72hx on some PJ's could be improved by going to the P43.
I'm not sure you could see the small amount of light reduction of the P43 if there is any.

Terry