CurtPalme.com Home Theater Forum

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

How big and bad of a task would this be??

Anyone taken this on? Is the LC chamber siliconed etc?

Ben

Mark_A_W · Posted: Tue Jan 22, 2008 4:17 am Post subject:

Yes, I've done it 6 times.

It's a big job, but nothing is particularly difficult.

You need turps to soak the housing off the AC tube, and a bunch of clamps and a simple jig to get the LC housing off the LC tube.

They are both siliconed on, but I would not soak the LC housing as the bellows may get destroyed (and you don't need to).

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

6 times?? Wow....

what are turps?

Let me know if you need any XG bits...I'll send 'em, I promise!

Ben

**AnalogRocks** · Posted: Tue Jan 22, 2008 6:11 am Post subject:

Turps=turpentine?

Mark_A_W · Posted: Tue Jan 22, 2008 8:30 pm Post subject:

Yes, turps = mineral turpentine. Might be called mineral spirits over there.

It's about the only solvent that will loosen up silicone. Takes ~3 days or so.

dbaisey · Posted: Tue Jan 22, 2008 8:42 pm Post subject:

I have seen a couple DIY's. Tube was siliconed in crooked. Doug

Mark_A_W · Posted: Tue Jan 22, 2008 8:50 pm Post subject:

LOL, you need a weight with a hole in the middle of it.

It's not rocket science.

dbaisey · Posted: Tue Jan 22, 2008 8:53 pm Post subject:

I didn't even ask.....

Mark_A_W · Posted: Tue Jan 22, 2008 8:56 pm Post subject:

And you need 4 little rubber/plastic spacers 0.2mm thick - just like NEC used (the red dots).

kschmit2 · Posted: Wed Jan 23, 2008 8:55 am Post subject:

Mark, didn't you have a website where you documented your tube transfer?

Mark_A_W · Posted: Wed Jan 23, 2008 9:29 am Post subject:

http://members.optusnet.com.au/~mswilcock/gallery.html

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

nice link...man, some of you guys can get stellar geometry from your NEC's. I don't think i've ever been able to get such straight lines!

Although I have a totally roasted PG now, and my lines are straighter than any projector I've owned...I think there is some unworkable variation among certain NEC's.

Do you think it's possible to make a PGXtra, a PGXtraLC? I think the Xtra can be almost as sharp as an XG, and I prefer it's chassis to the XG chassis...

I know there is a guy in Canada who somehow did this...any thoughts?

Ben

kschmit2 · Posted: Wed Jan 23, 2008 9:13 pm Post subject:

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

I wish I was german...I guess It's just a matter of getting the LC chambers and c-elements mounted properly within the plus chassis.

Mark, did you ever think you should have gone this way, or do you prefer the XG chassis?

Ben

Mark_A_W · Posted: Thu Jan 24, 2008 12:25 am Post subject:

I like the centre Astig controls, and the improved Line Distortion etc.

I like the fact the Def heatsink runs cool.

I dislike the tendency for the Back Raster to show (that'll make you learn to do a mech white balance..).

I dislike the lack of robustness in syncing/clamping/image wrap compared to an Xtra.

The extra fan noise doesn't bother me - put a resistor in series with the def fan to knock the whine out of it, then it's about the same as an Xtra.

But I don't know how Bradad squeezed them into an Xtra. The 3 LC tubes are wider than the gap in the chassis..

Fitting G70 tubes would be awesome, if you could fit them, in either chassis, G70 flapping is AWESOME.

kschmit2 · Posted: Thu Jan 24, 2008 9:20 am Post subject:

Mark, matti_u used G70 housings.

He used a GP3000 donor chassis and slighly modified the housings to be able to use the GP3000 mounting bracket.

Due to the fact that HD-18 lenses are shorter than HD-144 lenses he moved the entire lens assembly a bit to the front.

The Sony housings are 25mm higher than the NEC housings, and had to be mounted 10mm lower to maintain the horizontal optical axis. He achieved that by removing the power line filter/mains filter. That way the mountings fit into the NEC chassis. The mains filter was replaced by an external filter.

He had to rotate the green tube by 180 degree. HV cable is long enough for that, but neckboard cables are too short. So he desoldered them and re-attached them to the back of the board. Incl. G2 and ground pins. Cables to the green neckboard had to be extended a bit.

Deflection and G2 boards also had to be moved to different places - further back (they were originally attached to the mounting bracket).

Ohh, and he mentions your method of removing NEC tubes from their housings Smile

Mark_A_W · Posted: Thu Jan 24, 2008 11:30 am Post subject:

Yep, I Google translated Matti's page, and was chuffed (that means pleased) to see me mentioned Smile

Can't get the translation to work now for some reason...doh.

Matti is da man. It's really impressive what he did.

I've had idle thoughts about dropping an XG 1101 into a GP5000 chassis or something like one day I have a whole 1101 board set and powersupply (well, Mike P has my neckboards now). Just make adapter plates to fit the smaller tubes in big lenses. Pity the GP5000 has no flapping, but with careful setup that's not the end of the world.

Just need a GP5000 Smile

For some reason there seems to be a whole bunch in Queensland but none here in Melbourne.