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nidi
Joined: 17 Aug 2008
Posts: 305
Location: Switzerland
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| Posted: Thu Jun 24, 2010 1:56 am Post subject: Marquee Neckboards - 8" vs. 9" - difference? |
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Hello guys,
are there any differences between a Marquee 8" to a 9" Neckboard?
if yes, can a 8" neckboard be upgraded to a 9" ?
Thanks
Michael
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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nidi
Joined: 17 Aug 2008
Posts: 305
Location: Switzerland
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| Posted: Thu Jun 24, 2010 2:06 am Post subject: |
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| Nashou66 wrote: | just the cut out in the PCB board, the 9 inch need to be cut to work on the 8 inch I believe. its the shape of the socket on the tubes.
Athanasios |
Thanks,
any values thght be different from on 8" one to 9" ?
Michael
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Nashou66
Joined: 12 Jan 2007
Posts: 16171
Location: West Seneca NY
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Sparky015
Joined: 12 May 2009
Posts: 1185
Location: Cleveland / Akron, OH
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| Posted: Thu Jun 24, 2010 2:35 am Post subject: |
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yep, I just upgraded my 8500 to be a 9500. Used the same neckboards. I had to mod them, but only because I'm not running stock tubes.
_________________
~Paul
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Jun 24, 2010 2:36 am Post subject: |
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You might want to ask Tse for confirmation on this, but I THINK the beam current limiter is also set to a higher limit for 9" tubes.
CJ
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nidi
Joined: 17 Aug 2008
Posts: 305
Location: Switzerland
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| Posted: Thu Jun 24, 2010 2:41 am Post subject: |
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| cmjohnson wrote: | You might want to ask Tse for confirmation on this, but I THINK the beam current limiter is also set to a higher limit for 9" tubes.
CJ |
Thanks CJ,
hope someone can tell me how easy the limiter can be changed to the value of a 9" tube
Michael
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Jun 24, 2010 2:47 am Post subject: |
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It's not an adjustment you can make in the field. It's in the "x-ray critical protection" section of the circuitry and the procedure isn't documented, nor will you have much luck trying to figure it out without directions. It requires test equipment and fixturing that I think
nobody has but VDC.
But there's really no need to worry about it. You won't have any problems running either the 8 or 9 inch cards on either the 8 or 9 inch tubes. The only time you'd ever have to worry about this setting is if you had a card with a badly set BCL or damaged BCL circuit and
it was causing HV shutdown without good reason.
CJ
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