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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Fri Dec 18, 2009 1:56 am Post subject: SMB video cable/connector for Marquee |
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By an amazing coincidence the hole spacing on a panel mount SMB connector almost perfectly matches the hole spacing on the PCBs for the mini RCA connectors on the VIM and Neck cards. A couple of tiny 0-80 screws, nuts, and washers will mount the connector to the board. I'm sure there is a suitable metric size, too. You have to put small diameter washers between the connector body and PCB on the top side and between board and nuts on the other side to keep from shorting signal to ground. There is a big hole to fill to connect the signal to the PCB. Someone will think of a good way to connect the two. A cable with right angle connectors and you got it. Coming soon to new VDC projectors. (Unless someone knows where to get the right angle male mini-RCA connectors?)
Scott
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Fri Dec 18, 2009 1:59 am Post subject: |
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Nice! Hey Scott, looking at those pix reminds me of something:
Why not ask the bosses at VDC if you can put out a 'DIY' Marquee projector.. something like Heathkits... for big boys! 
Hell, only give the schematics in the box, and a messload of parts. We can have a competition here as to who can make it work first. I'd be the first to buy one, but as with Heathkit way back when, allow people to buy the chassis only... without the pix tubes. THat would drop the price, and I've got enough tubes here for mine...
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Fri Dec 18, 2009 2:02 am Post subject: |
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Barry - Joust suggested SMA's for that very connection about 2 years ago.
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HD done right!
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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JustGreg
Joined: 07 Mar 2006
Posts: 3098
Location: Kenosha, WI
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| Posted: Fri Dec 18, 2009 10:02 am Post subject: |
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Count me in. I'd buy a set of high quality cables from you! 
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Greg
"Is it ignorance or apathy? Hey, I don't know and I don't care!" --Jimmy Buffett
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat Dec 19, 2009 12:17 am Post subject: |
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Hi Scott, I got a responce back form Connect tech:
Hi Athanasios,
Thank you for your inquiry and we are very pleased to quote the following:
I am very pleased to quote the following:
Part number: CTP-175-10A
US$0.85/each for 50 pcs
US$0.68/each for 100 pcs
US$0.51/each for 500 pcs
US$0.41/each for 1K pcs
Note:
1. All prices for PER SHIPMENT QUANTITY and FOB warehouse in California.
2. Lead time 6-8 weeks if out of stock (3-4 weeks by int'l express with an adder).
3. Minimum order 50 pcs
4. Stock status: In stock ~ 5000 pcs
So they must have got them in stock, want me to order 50 PC to see what they are like and I can send you some to test?
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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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat Dec 19, 2009 12:56 am Post subject: |
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How about something a little different. What if you soldered the video cable direct to the boards on both ends and put male/female BNC connectors on the fly?
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Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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| Posted: Sat Dec 19, 2009 1:01 am Post subject: |
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| stefuel wrote: | | How about something a little different. What if you soldered the video cable direct to the boards on both ends and put male/female BNC connectors on the fly? |
Your in my head Chip? I was thinking this long time ago when i was looking for connectors. I wanted to solder a short coax
cable fitted with the BNC end aon both boards, and actually make the VNB coax about 6 inches long so you would not have to remove the Metal Cage each time you wanted to test for a bad VNB, just pop off the BNC and swap them with no cage removal.
On Another Note, I have been looking over the RGB schematics on the Ampro Chip 
Looks like some changes can be made 
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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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sat Dec 19, 2009 2:39 am Post subject: |
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| Curt Palme wrote: | Nice! Hey Scott, looking at those pix reminds me of something:
Why not ask the bosses at VDC if you can put out a 'DIY' Marquee projector.. something like Heathkits... for big boys!
Hell, only give the schematics in the box, and a messload of parts. We can have a competition here as to who can make it work first. I'd be the first to buy one, but as with Heathkit way back when, allow people to buy the chassis only... without the pix tubes. THat would drop the price, and I've got enough tubes here for mine... |
Huh. I wonder if anyone would buy the pj without the tubes and lenses? That would cut the cost way down. I think the only way it would work is if there was a 900 number (are there still 900 numbers?) for the tech service. I imagine there would be alot of calls.
Scott
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Sat Dec 19, 2009 2:42 am Post subject: |
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| Nashou66 wrote: | Hi Scott, I got a responce back form Connect tech:
Hi Athanasios,
Thank you for your inquiry and we are very pleased to quote the following:
I am very pleased to quote the following:
Part number: CTP-175-10A
US$0.85/each for 50 pcs
US$0.68/each for 100 pcs
US$0.51/each for 500 pcs
US$0.41/each for 1K pcs
Note:
1. All prices for PER SHIPMENT QUANTITY and FOB warehouse in California.
2. Lead time 6-8 weeks if out of stock (3-4 weeks by int'l express with an adder).
3. Minimum order 50 pcs
4. Stock status: In stock ~ 5000 pcs
So they must have got them in stock, want me to order 50 PC to see what they are like and I can send you some to test?
Athanasios |
You know, I have samples of that part. The purchasing person told me that there was some sort of problem with them or getting them. I'll have to check it out on Monday. I wonder how you put them together and if they would take the pulling and tugging on them to unplug from the boards?
Scott
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Nashou66
Joined: 12 Jan 2007
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Location: West Seneca NY
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Mon Dec 21, 2009 4:19 am Post subject: |
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I thought about going to SMA or SMB cables several years ago. But I didn't pursue it as I didn't, and still don't, know how it will affect
performance to be using 50 ohm cables and connectors on what I must presume to be a nominal 75 ohm circuit. I didn't want to get into
extra work if it wasn't going to make for a better product.
How does the new version with SMB cabling work out? Any bandwidth or ghosting issues?
CJ
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Mon Dec 21, 2009 2:32 pm Post subject: |
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75 ohm cables and connectors are available in SMB. The circuit is nominally 75 ohms but if isn't, exactly. The back termination resistors for red and green on the VIM are 24 ohms. The blue back termination resistor is 75 ohms.
I will probably test the SMB idea with 50 ohm cables. Those I ordered from Digi-key already made. I would have to make 75 ohm ones. That will come later.
Scott
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HK-Steve
Joined: 15 Jul 2006
Posts: 849
Location: Switzerland
TV/Projector: Marquee 9500, Epson 8100
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| Posted: Tue Dec 22, 2009 7:41 am Post subject: |
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Curt, I also like the DIY idea,
Especially for the VNB, which the pics shows.
Then we could have the latest design without buying a New projector.
Maybe a DIY VIM also??
Wasn't there a big thread on the VNB cables were 50 ohm OEM??
Not 75 ohm.
Cheers
Steve
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1031
Joined: 22 Mar 2006
Posts: 657
Location: Finland
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Tue Dec 22, 2009 2:05 pm Post subject: |
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Part number for new, bare neck card PCB is 65518-01 Rev C.
Don't forget the new heatsink.
Scott
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Tue Dec 22, 2009 2:13 pm Post subject: |
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IIRC, the majority of Marquee boards are built by a board house in Ontario, aren't they?
With no local board manufacturing, getting blank boards to stuff yourself would be a challenge. Plus many of the parts used in some
boards like the HDM are available from a very limited number of distributors.
Here's a suggestion that I think is reasonable, though: Board refurbishment and updating to latest revisions, at VDC, for a reasonable
price. Provided the board you have is suitable for updating.
Here's a tech question for you as well, Scott. I've got an HDM which develops a rapid "jiggle" but only at 1080p. And only when it's
been running at THAT mode for several minutes. It's like something heats up when running at 1080p but not when running at lower
resolutions, and when it gets hot enough, these shakes start up. They're strongest at the top of the picture and the shake is so
rapid that it's almost a blur. Any idea what's going south here?
CJ
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Tue Dec 22, 2009 2:27 pm Post subject: |
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| cmjohnson wrote: | IIRC, the majority of Marquee boards are built by a board house in Ontario, aren't they?
With no local board manufacturing, getting blank boards to stuff yourself would be a challenge. Plus many of the parts used in some
boards like the HDM are available from a very limited number of distributors.
Here's a suggestion that I think is reasonable, though: Board refurbishment and updating to latest revisions, at VDC, for a reasonable
price. Provided the board you have is suitable for updating.
Here's a tech question for you as well, Scott. I've got an HDM which develops a rapid "jiggle" but only at 1080p. And only when it's
been running at THAT mode for several minutes. It's like something heats up when running at 1080p but not when running at lower
resolutions, and when it gets hot enough, these shakes start up. They're strongest at the top of the picture and the shake is so
rapid that it's almost a blur. Any idea what's going south here?
CJ |
Hmm, Curt what about you doing this?
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Nashou66
Joined: 12 Jan 2007
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Tue Dec 22, 2009 6:31 pm Post subject: |
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| cmjohnson wrote: | Here's a suggestion that I think is reasonable, though: Board refurbishment and updating to latest revisions, at VDC, for a reasonable
price. Provided the board you have is suitable for updating.CJ |
having worked in manufacturing for decades I can say with certaintly the cost of having a company do that would be more than the cost of a brand new board.
| tse wrote: | Huh. I wonder if anyone would buy the pj without the tubes and lenses? That would cut the cost way down. I think the only way it would work is if there was a 900 number (are there still 900 numbers?) for the tech service. I imagine there would be alot of calls.
Scott |
LOL, you would need to hire a whole team of people to man the phones, and that would be just for the first few chassis's sold.  If you guys decide to sell chassis's minus tubes it would have to be to qualified tech's who know what they're doing. Otherwise you'de be selling a can of worms.
I think the better option is to have an affordable board package but the real problem is no matter how affordable you made it the market isn't really there to support the costs. The average HT enthusiast, even one who loves CRT, is hard pressed to drop even a few hundred bucks anymore.
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