CurtPalme.com Home Theater Forum

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

Hi everybody,

I am using a modded NEC 10PG on an mildly curved AT screen. Recently the point convergence board died, but to me the pictire is still acceptable. I also have a second machine as spare. Both units have really good tubes.

Now I could get a Marquee 9500LC Ultra, seller says it's a VDC built ca.2004, mild masks, plus 1 blue and 1 redThomson tube with a modded b Board no masks. Don't know it the c-elements are coloured.

I have been using and fixing NECs eversince and feel pretty familiar with the PGs. Never seen a Marquee yet. I think I would change if:

1 light output is at least as much as with the 10PG
2 colours are not too much worse. Hope this can be coped with the PC colour management which is already used to calibrate the 10PG
3 the Marquee gives hope to be more reliable with respect to recent repots of dieing caps in the older PG sets

Changing the projector mount, rebuilding the hush box, getting familiar with Marquee specific setup, researching about usefull mods (miose, cooling, picture quality) - this all means some effort. But if this means I won't have trouble ahead because the Marquees are more reliable than the old PGs, then its probably worthwhile to check out. What do you think? Is there an advantage to the Thomson tubes?

Thanks
hansilili

barclay66 · Posted: Wed Mar 27, 2013 10:39 am Post subject:

Hi,

1 light output is at least as much as with the 10PG
-> Absolutely: 1300 peak lumens vs. 1000.

2 colours are not too much worse. Hope this can be coped with the PC colour management which is already used to calibrate the 10PG
-> Although I would recommend a red C-element (the green one is standard on the Marquee), I've seen stock machines running without and the picture was still ok without CMS after delicate G2 and gain adjustments.

3 the Marquee gives hope to be more reliable with respect to recent repots of dieing caps in the older PG sets
-> If the Marquee is from 2004 You should be quite safe. And it should be easier to get parts if needed...

One note on the Thomson tubes. These are more or less worthless if You don't have the following:
- A complete set of Thomson tubes
- An old style HVPS as they require a higher voltage (40KV instead of 34.9KV)
- Neck boards for the Thomson tubes
- A very clean HV cable routing in order to avoid arcing (due to higher voltages)

Mixing Thomson tubes with regular P19LCP is not an option. And I've read somewhere that they wore out quite quickly...

Regards,
barclay66

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

I had Electrohome, and still have NEC so I think I can give some insight.
A stock marquee don't have red C-element, only green, while the NEC have both, while the C-element is the same in both machine but it is a royal PITA to remove from the NEC.
The raw bandwidth of the Marquee is much higher than the PG's. Going to marquee from a NEC will give you the impression that you lost the control over the geometry adjustments, the marquee have far less adjustments for both geometry and convergence (maybe problematic for your curved screen).
I am not sure about the thomson tubes, because the very first series of marquee 9000s were equipped with real thomson tubes that used 40kV HVPS that went bad quite often for this reason. While the newer tubes using still thomson made coils (that can bee seen through the holes) but the raw tube is panasonic (what you don't see directly). In theory the tubes from the 10PG also could work in the Marquee, but I guess no one did this yet...

Anyway do you have lens for curved screen? That would help for the NEC too.

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

Thanks for your replies,

So Thomson isnt' realy better (don't know why I hat the impression) only different? And can't be mixed with Panasonic.

Would be interesting to know if 10PG tubes fit into an 9500 ultra. If so, then I could swap the red tube assembled with the C-element. Curt, that possible?

I use GT17 lenses with the NEC already and live with the compromise of smearing optical edge focus.

Cheers
hansilili

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

hansilili · Joined: 09 Mar 2007 Posts: 302 Location: Köln, Germany

barclay66 · Posted: Wed Mar 27, 2013 11:36 am Post subject:

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

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia

GeorgeSong used NEC tubes in a Marquee im sure of it, they were from a GP5000 i think.

Motobias · Posted: Wed Mar 27, 2013 4:00 pm Post subject:

how much is the marquee ?
if you can score a good deal, definitely take it Smile

going up the a1 north anytime soon ? you can drop in for a coffee at my place and have a look at my (not yet properly set up) 9500lc

i recently discovered they are great projectors and really nice to work on Wink

if you don't want it...i might take it.

CIR Engineering · Posted: Wed Mar 27, 2013 7:32 pm Post subject:

My opinion is that you should keep the NEC over the Marquee. You have spare parts for the NEC already, and the Marquee will not be more reliable anyway.

my 0.02

craigr

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

First off I bet those Thompson tubes are not Thompson tubes. If the seller just opened up the metal access cover on the Marquee tube he would see a Thompson sticker. Thompson also makes the Deflection coil and focus coils so that is the sticker he sees. the Tube sticker is further up and out of sight.

See here

Athanasios

km987654 · Posted: Thu Mar 28, 2013 11:26 am Post subject:

And then there is Thomson and Thompson Confused

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

CasetheCorvetteman · Joined: 09 Nov 2008 Posts: 6326 Location: Australia