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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun May 15, 2011 1:14 am Post subject: NEC e8510 tubes in 6pgextra |
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Not sure if anyone is interested, but with an abundance of spare parts and some free time I have manged to get a e8510 (gp3000) tube working in a 6pg extra. I've only done very limited testing but, the G2 is ok, focus looks decent and geometry is adjustable. If anyone is interested I will update my progress as I go along.
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Thu May 19, 2011 4:23 pm Post subject: |
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sure, please post your findings 
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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: Thu May 19, 2011 5:52 pm Post subject: |
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NO, no one here wants to hear about anything CRT related in this forum 
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Fri May 20, 2011 12:10 am Post subject: |
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| AnalogRocks wrote: | | NO, no one here wants to hear about anything CRT related in this forum |
Oh, in that case I won't tell anyone about how it works near perfect (no astig need 36.5mm focus yokes) I've only tested the green tube so far, but I have all alignment and focus controls working, and these tubes appear very sharp. Hopefully I'll have time to rewire/mod the neck-boards for blue/red tubes and post up some screens of it all converged. If I manage to get it working 100% in the PG extra, I will try the same for an XG.
/e
| kschmit2 wrote: | please share all your findings with us.
I do have at least one set of pristine e8510 tubes here |
I've never seen a gp3000 with worn out tubes, I wonder why
Last edited by A Rogers on Fri May 20, 2011 5:56 pm; edited 1 time in total
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kschmit2
Joined: 09 Mar 2006
Posts: 1141
Location: Heidelberg, Germany
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| Posted: Fri May 20, 2011 11:47 am Post subject: |
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please share all your findings with us.
I do have at least one set of pristine e8510 tubes here
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Wed Sep 19, 2012 8:40 am Post subject: |
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So what about this stuff, did you manage all three tubes to work? What about sharpness and brightness?
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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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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Sep 24, 2012 11:17 am Post subject: |
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Whats the difference between those and E8508s?
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Mon Sep 24, 2012 11:37 am Post subject: |
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One thing sure: the E8510 has the thick neck as the most of other tubes out there.
Once I had one green E8510, but I threw it out, because it had a "No input" burn in, however it was pristine otherwise, now thinking back it could've worked in 16:9 
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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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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Sep 25, 2012 3:32 am Post subject: |
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Thick neck you say? Like a P19 thick?
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Sep 25, 2012 5:15 am Post subject: |
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| CasetheCorvetteman wrote: | | Thick neck you say? Like a P19 thick? |
Yes.
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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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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Sep 25, 2012 10:16 am Post subject: |
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Ok, so now that thick necks are in, whats to stop the use of P19s in an XTRA or XG?
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Sep 25, 2012 11:01 am Post subject: |
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| CasetheCorvetteman wrote: | | Ok, so now that thick necks are in, whats to stop the use of P19s in an XTRA or XG? |
Not a big deal, the PG10's tubes also have thick neck, also we discussed this before (check)
So in a PG10 chassis it could work, but I don't have a PG10 laying around nor good P19 tubes, otherwise I'd happly play with them, also generously offer my PG xtra for this experiment 
Another thing: everyone says that E8505 tubes are not compatible with PG xtra, however I found one thread where Mark_A_W states he managed to work E8505 red and blue tubes in a PG xtra, but he also said the green doesn't work, but did not explain WHY?
AFAIK tubes are not that hard to use:
-they need a proper G2 setting (which can be done with the "do not touch" pots )
-and proper cathode voltage I think this also can be tweaked.
-do not exceed the maximal anode voltage (rarely a problem)
The harder nut is connecting the coils/yokes.
Anyway I don't see much point in tweaking a PG xtra to be a 9" machine, because probably it won't exceed the ready made 9" EM machines, with XG mod it worth a bit longer thinking, but in that case the problem is the constructional difference between the PG and XG chassis, so it would be an extreme machine work just for catching the top three.
_________________
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: Tue Sep 25, 2012 11:08 am Post subject: |
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Another interesting thing that Sony G90s are famous for they mighty unrepairable YA board failure, I haven't heard any G70 transplantation to G90 either, G70s are seem to be more reliable, and the performance gap is thin -at least on paper.
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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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