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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sat Oct 23, 2010 4:52 am Post subject: Thomas tubes in a Marquee made easy! |
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With the assistance of Tse, who graciously provided me with the pre-designed circuit board files,
I am making the commitment to have a short run of adapter PC boards made that will allow you to simply plug
your Marquee neck card right on to the neck of a Thomas (or Sony) CRT.
If there is a need for such a thing, I can also have them made for the reverse application: Putting Panasonic pinout
CRTs into a projector with neck cards set up for Sony CRTs. It's not a lot of work to make those changes.
The boards are now ordered with the PC board house, and I should soon have the sockets and pins I need.
Pricing will be set once I figure my actual cost to make these, Parts plus a little bit of labor and a couple of bucks
to make it worth my while.
I'm GUESSING that I can bring them in at about 50 to 75 dollars for a set of 3.
The adapter consists of two small PC boards connected together, stacked. One has pins to mate with your neck card,
and the other has sockets to mate with your CRT. All the conversion wiring is printed on the PC boards.
I currently have four full sets of Thomas CRTs that don't show a trace of wear. But I haven't powered them up yet,
either. Pending successful testing, my plan is to keep one set and sell what's left over that's good.
When I sell those off, I'll include socket adapters if you need them, at no additional cost.
CJ
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sat Oct 23, 2010 5:52 pm Post subject: |
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CJ
You want pins and sockets now???
You can have them in gold plated on the cheap. Go to the shack and pick up a couple of crimp type sub D male and female connectors. The pins are the correct size and the female sockets obviously fit the pins. $1.99 a pack.
I've already done it 
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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 Oct 23, 2010 5:56 pm Post subject: |
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| stefuel wrote: | CJ
You want pins and sockets now???
You can have them in gold plated on the cheap. Go to the shack and pick up a couple of crimp type sub D male and female connectors. The pins are the correct size and the female sockets obviously fit the pins. $1.99 a pack.
I've already done it |
Yep, i have them too. I think its easier to mod the VNB. And i was measuring distance, the VNB comes out to far toward the rear heat sink. I like to keep it further away from the EMI noise possibly created on the rear heat sink boards.
But ti still be neat to be able to swap back and forth different tubes.
Athanasios
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Marquee High Performance Bellows now shipping!!
Marquee Modifications and Performance Enhancement
Marquee C-element and Bellow removal
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sun Oct 24, 2010 3:15 pm Post subject: |
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That's the point of this. You don't have to butcher your neck card. This is particularly nice for those of you who don't have good soldering
skills and/or just don't want to make major changes to a valuable neck card.
It's a big time saver, as well.
CJ
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Sun Oct 24, 2010 4:17 pm Post subject: |
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My first attempt at making adapters that plug onto the existing key of the tube, rewire and add a second key salvaged from a old tube would work fine but adds almost 7/8ths of a inch to the overall length of the assembly which makes it to long to get the neckboard on without sliding the tube forward. I did not want that, so I re-wired the board.
After thinking about it, I could probably cut that down to about 1/4th inch if I was willing to chance removing the key and bending the pins 90 degrees and re-wire externally. Not going there. Mod the board.
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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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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Sun Feb 13, 2011 5:06 pm Post subject: |
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Chris did you ever get these made, standard MArquee VNB to Thompson pin-out adapter?
EDit: oops, I see now it's Thomas tubes which I'm guessing are different from the old Thompson tubes of the early 90"s?
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kaylee18
Joined: 22 Feb 2011
Posts: 17
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| Posted: Tue Feb 22, 2011 11:41 pm Post subject: |
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This work with LC models?
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MikeEby
Joined: 24 Jun 2007
Posts: 5237
Location: Osceola, Indiana
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| Posted: Tue Feb 22, 2011 11:52 pm Post subject: |
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Let me know if you would like me to run them through the wave solder machine at work....If you want to avoid all the hand soldering...I could also have our PCB quote quote you on the boards. I'm assuming you have a Gerber file?
Mike
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Wed Feb 23, 2011 2:44 pm Post subject: |
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I've got the boards on order. And they can't be wave soldered as it consists of two boards sandwiched together with short connecting
pins running between them, in a cage-like construction method. It only takes a minute or two to solder them by hand, anyway.
LC or AC, as far as these adapters are concerned, it doesn't matter. But, when's the last time you saw air coupled 9" tubes? I never have.
So they'll ALWAYS be used in an LC application, of course.
CJ
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