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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Nov 12, 2012 5:27 pm Post subject: |
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| macgyver655 wrote: | | gjaky wrote: | | They did a preselection in the factory: the better performers got higher rates, the worse ones speced at lower rates, . |
Are you saying.... that you think these are all the same manufactured part and they are assigned different part number based on their individual performance tests? |
Are you serious? I think most of them are the same, of course some of them are differently constructed. referring to your post if a 65MHz speced ic could do 100MHz then why not selling it as a 100MHz part what you could sell for more money. But if a specific IC can do of say 75MHz they can not sell that as 80Mhz, so they sell as 65MHz. The test what they did in the factory (if they did at all) were either not precise enough or they must have produced a certain number of every type per day, so it could easily happend that higher quality chip was speced at lower rate. The 160MHz as maximal bandwidth maybe was the absoulte maximum that they could reach with that specific design.
If you look at the attached videochip overview you can see that there are groups with exactly the same specs except for the bandwidth, for me it's a sign, of course I could be wrong.
But whatever is the truth we can only say that the chips in PG plain, and PG plus are specified at 65MHz typ; we have no certain information how they performing in reality. The only thing what was majorly redesigned (regard of the RGB line) between the transition to PG xtra was the Video output driver stage, and the neck board in the PG xtra performs noticeably better. Also the chips are in the PG plain and plus could be any good, but the chips in the PG xtra are much better without doubt.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
Last edited by gjaky on Mon Nov 12, 2012 6:52 pm; edited 1 time in total
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Nov 12, 2012 5:27 pm Post subject: |
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-double post-
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
Last edited by gjaky on Mon Nov 12, 2012 6:46 pm; edited 1 time in total
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Nov 12, 2012 5:59 pm Post subject: |
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WOW...I mean wow. You actually believe that all these chips are manufactured the same and as they come off the assembly line they are "each" tested and then given a part number based on their tested performance? No internal modifications or differences in manufacturing process or materials? WOW.... I mean wow.
First you guys are saying the advertised speed is it's maximum speed and when I show you other wise you change it to something else. And that is they are all the same.... WOW..... 
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Nov 12, 2012 6:15 pm Post subject: |
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Mac, have you already disassembled any Sanyo video amps? They were manufactured with some sort of thick film technology, with this every, I mean EVERY part is trimmed individually, during trimming it isn't hard to perform a fast quality test.
Note the circuit configuration is the same for all.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Nov 12, 2012 6:36 pm Post subject: |
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Mac, please note that this is my thread, and I wasn't saying anything on your comment on 'that 65MHz is more or less?' until today, so I did not change my mind 
I said 65MHz for the VPH06s, and calculated with that, because that is the only thing what is SURE about them. Mac, do you have any evidence about how good performing VPH06s were used in NECs? Because I don't, that is why I referred to it with it's advertised specs, did I make a mistake?
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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kabuby77
Joined: 28 Mar 2011
Posts: 147
Location: Italy
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| Posted: Tue Nov 13, 2012 1:09 am Post subject: |
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Surely you have a lot of imagination 
Please note that the working voltage and speed are inversely proportional. Those chips are not the same, the selection of which you have spoken is done for pc's CPU
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Nov 13, 2012 2:16 am Post subject: |
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| macgyver655 wrote: | WOW...I mean wow. You actually believe that all these chips are manufactured the same and as they come off the assembly line they are "each" tested and then given a part number based on their tested performance? No internal modifications or differences in manufacturing process or materials? WOW.... I mean wow.
First you guys are saying the advertised speed is it's maximum speed and when I show you other wise you change it to something else. And that is they are all the same.... WOW..... |
Hahahaha!!! Seems as though you really mean it eh? 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue Nov 13, 2012 10:59 pm Post subject: |
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| gjaky wrote: |
I said 65MHz for the VPH06s, and calculated with that, because that is the only thing what is SURE about them. Mac, do you have any evidence about how good performing VPH06s were used in NECs? Because I don't, that is why I referred to it with it's advertised specs, did I make a mistake? |
Give me specifics as to what your looking for as far as specs and/or info. What devices in particular?
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Wed Nov 14, 2012 10:55 am Post subject: |
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Unfortunately I can't step forward until I get a PWC-3715 GAIN CTL board...
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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hansilili
Joined: 09 Mar 2007
Posts: 302
Location: Köln, Germany
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| Posted: Thu Nov 15, 2012 1:37 pm Post subject: |
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Guys, there are non native english speaker and readers involved here and I am of that kind too. Could you please try to use precise language for the technical part of the diskussion and clearly separate and indicate any kind of irony or emotionally motivated statements...
Irony on <because I bloody German don't sense any humor> irony off.
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HansA, alles andere ist euer Bier!
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Nov 15, 2012 10:53 pm Post subject: |
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Im Australian, and i dont speak english either
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kabuby77
Joined: 28 Mar 2011
Posts: 147
Location: Italy
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| Posted: Fri Nov 16, 2012 8:08 am Post subject: |
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| CasetheCorvetteman wrote: | | Im Australian, and i dont speak english either |
  there are a lot of funny guys here
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Fri Nov 16, 2012 8:10 am Post subject: |
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We aim to entertain
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sat Dec 15, 2012 1:38 pm Post subject: |
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Thanks to Mr. Curt Palme I now got two GAIN CTL boards to play with, the real experimenting will begin soon...
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Sun Jan 27, 2013 4:40 pm Post subject: |
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Slight update, the new experimental CTL board is ready, hopefully I can adjust in the next few days or so.
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_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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Zolzar
Joined: 26 Jun 2009
Posts: 252
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| Posted: Mon Jan 28, 2013 2:29 am Post subject: |
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Very interesting....I am looking forward to your results.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Jan 28, 2013 5:58 am Post subject: |
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Yes me too.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Jan 29, 2013 4:14 pm Post subject: |
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Ok, the work has been done. The board and the concept works in general, I made to fit the CXA1779 in place of the CXA1209, without the need of recalibrating the whole machine. However, I'd lie if would say the new board looks better, but it's not worse either (at least), they do look exactly the same to me.
Also as usually an unforseen side effect occurred in the new board: somehow it doesn't like if any portion of the horizontal back porch is blanked out, otherwise it will streak badly and shifts the color balance, which I may try to eliminate later or may not.
Of course these are only first impressions, I'll throw the board in normal use, and further testing will come.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Jan 31, 2013 2:52 am Post subject: |
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What happens if you use position shift? My 9PG doesnt like too much of that being used.
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