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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sat Jan 26, 2008 6:58 pm Post subject: 9500 - mixed tubes |
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Hi,
My Marquee has the following tubes in it;
Green PT22-19
Red P19 LPB 03 RJA (taken from a Barco 1209s )
Blue P19 LCP 09 BMB
From what I can gather, the Red and Green are hi-resolution tubes ? The blue is stock.
This won't cause any problems will it? Everything appears to work okay but I just wondered if I might have any unexpected issues.
The Red neckboard has been modded for the tube as below;
Is there any other modding the neckboard might need to take advantage of the hi-res tubes?
Thanks,
Paul
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sat Jan 26, 2008 7:20 pm Post subject: |
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Hello
The PT22-19 is P43 and may give flicker issues, as well as lower output than standard green. Is it color filtered?
.
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sat Jan 26, 2008 10:06 pm Post subject: |
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Hi Tim,
Yes, it has a green (and a red ) C-Element in place. When you say flicker issues, do you mean at lower frequencies like say 48hz or so?
The projector is currently stripped down for maintenance at the moment so I can't check the G2 settings but presumably that plus brightness will need to be increased in relation to the other tubes?
Paul
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sat Jan 26, 2008 10:57 pm Post subject: |
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Is it just me or are those aquadag ground leads clipped onto the worng place? I can't find it now, but there was tech. bulletin that talked about removing the ground leads from the metal cage, bending the cage prongs out 30 degree's, and re-installing the ground leads to reduce video noise. In that bulletin i seem to remember it saying to NOT plug the leads onto any other place on the VNB?
If you look under the metal cage you will see there are 2 or 3 spark arrestors for safely discharging high voltage static build-up from the tube bell.
Last edited by draganm on Sun Jan 27, 2008 12:30 am; edited 1 time in total
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sat Jan 26, 2008 11:01 pm Post subject: Re: 9500 - mixed tubes |
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| PaulB wrote: | Is there any other modding the neckboard might need to take advantage of the hi-res tubes?
Thanks,
Paul |
oh yeah, you should replace those 2 little blue garbage capacitors with Nichikon 160 volt 105c temp. rated ones. I just fixed a "soft focus" issue on a marquee 8500 last night by swapping out those peices. fully resolved scan lines @ 1080P on a 4:3 screen afterwards 
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sun Jan 27, 2008 1:02 am Post subject: |
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The 'dag leads are in the wrong place. They should connect to the metal plate in the center of the card. The spark gaps aren't doing any good with the connections as shown.
Scott
_________________
"Were we directed from Washington when to sow and when to reap, we would soon want bread."
Thomas Jefferson
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Sun Jan 27, 2008 10:36 am Post subject: |
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| draganm wrote: | | Is it just me or are those aquadag ground leads clipped onto the worng place? |
| tse wrote: | The 'dag leads are in the wrong place. They should connect to the metal plate in the center of the card. The spark gaps aren't doing any good with the connections as shown.
Scott |
Well, thats interesting! This is how I received the pj when purchased. I saw the VNB was different when I tore down the Marquee for maintenance and took a photograph just to make sure I put the connectors back in the right place (the other unmodded neck boards have the connectors in the right place). I've had the pj running with the connectors in place as shown with no adverse effects - or at least none so far or that I know of  !
So even though its a modded VNB, the connectors should be as per the stock VNBs?
Thanks guys, sorry to be a pain!
Paul
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Jan 27, 2008 6:49 pm Post subject: |
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| PaulB wrote: | So even though its a modded VNB, the connectors should be as per the stock VNBs?
Thanks guys, sorry to be a pain!
Paul |
the mod in your pic simply moves the White G2 wire from pin 2 (stock tube), to Pin 6 for the LUG tubes and such. The 2 black wires should always go on the cage.
I also received a few Marquee's with the black ground leads plugged in like your pic. They were from an AFB where highly trained monkey's "serviced" a flight simulator 
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Tue Jan 29, 2008 8:08 am Post subject: Re: 9500 - mixed tubes |
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| draganm wrote: | | oh yeah, you should replace those 2 little blue garbage capacitors with Nichikon 160 volt 105c temp. rated ones. I just fixed a "soft focus" issue on a marquee 8500 last night by swapping out those peices. fully resolved scan lines @ 1080P on a 4:3 screen afterwards |
Thanks for that draganm. Is there any advantage in going from the quoted 22uf for these upto say 100uf as I've read elsewhere?
I have the 100uf's in hand and they will be a bugger to fit as they are much bigger than the stock 22uf ones!
Also, can you use non-polar caps in place of polarised ones?
Paul
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Tue Jan 29, 2008 8:20 am Post subject: Re: 9500 - mixed tubes |
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| PaulB wrote: | | draganm wrote: | | oh yeah, you should replace those 2 little blue garbage capacitors with Nichikon 160 volt 105c temp. rated ones. I just fixed a "soft focus" issue on a marquee 8500 last night by swapping out those peices. fully resolved scan lines @ 1080P on a 4:3 screen afterwards |
Thanks for that draganm. Is there any advantage in going from the quoted 22uf for these upto say 100uf as I've read elsewhere?
I have the 100uf's in hand and they will be a bugger to fit as they are much bigger than the stock 22uf ones!
Also, can you use non-polar caps in place of polarised ones?
Paul |
I think the 100's are too big id go no higher than 33 and no don't use non polar.
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
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PaulB
Joined: 26 Oct 2007
Posts: 359
Location: Bonnie (but rainy) Scotland
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| Posted: Tue Jan 29, 2008 8:29 am Post subject: |
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Blimey Athanasios! Do you ever sleep!!
Thank you for the prompt reply, that puts me back on track! I'll order up some new caps and hopefully get them installed next week when the Ohmites arrive from the US.
Thanks to all who replied, as always your advice and experience is much appreciated.
Athanasios - are you sure you're not MP posting under another name 
Paul
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Tue Jan 29, 2008 12:58 pm Post subject: |
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I wish I had MP's knowledge and experience!! i just Really Really really Got interested in all the MP maintenance stuff and kept researching thing about electronics and looked for more things Marquee related on this and AVS forum archives and have gone to all the chip makers web sites and read white papers on as much as i could handle before i realize i will only get 3 hours of sleep before i have to work! And owning my own Business helps, i don't have to worry about getting fired when looking up all this stuff at work!
Athanasios
_________________
Don't blame your underwear for your crooked ass~ unknown Greek philosopher
"Republicans believe every day is the Fourth of July, but the Democrats believe every day is April 15." --- President Reagan
One Smart Dog!!!
Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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