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skidooseadoo
Joined: 01 Feb 2017
Posts: 10
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 Link Posted: Thu Feb 09, 2017 8:39 pm Post subject: |
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Im so glad I joined this forum....thank you Kal for the info.
His name is Mike Osadciw from the Highest Fidelity.
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 17860
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Link Posted: Thu Feb 09, 2017 9:14 pm Post subject: |
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I've heard of him (though don't know him). I believe I remember seeing him on AVSforum years ago... back when I was more heavily involved with that forum. I would make sure to confirm he has Sony G70 experience. Sony CRT projectors can be a bit confusing, especially if you haven't touched any CRT projector in a while.
Let us know how it goes!
Kal
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My basement/HT/bar/brewery build 2.0
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skidooseadoo
Joined: 01 Feb 2017
Posts: 10
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| Link Posted: Thu Feb 09, 2017 9:51 pm Post subject: |
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| kal wrote: | | skidooseadoo wrote: | | The projector is installed on the ceiling and its bang on IMO. |
Bang on how? How did you calculate the throw distance?
Reason I ask is if you used the Sony calculator / recommended throw, it's too far and you won't use enough phosphor/won't wear evenly/won't put out as much light/will wear faster than it should. Manufacturer recommended throw distances are very conservative.
More info: http://www.curtpalme.com/TubeCondition.shtm
(third page has the best way to determine correct throw distance)
Kal |
We used PjCal. It was 2" closer approx than the Sony Spec.
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skidooseadoo
Joined: 01 Feb 2017
Posts: 10
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| Link Posted: Thu Feb 09, 2017 9:54 pm Post subject: |
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| kal wrote: | I've heard of him (though don't know him). I believe I remember seeing him on AVSforum years ago... back when I was more heavily involved with that forum. I would make sure to confirm he has Sony G70 experience. Sony CRT projectors can be a bit confusing, especially if you haven't touched any CRT projector in a while.
Let us know how it goes!
Kal |
He has done many installations of G70 and 90's. Hasn't done one in a while though.
He had no problem offering referrals to previous Sony Installations.
Thanx for the help.
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 17860
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Link Posted: Thu Feb 09, 2017 10:15 pm Post subject: |
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| skidooseadoo wrote: | | We used PjCal. It was 2" closer approx than the Sony Spec. |
That's what I was afraid of. It's too far back if you want to be optimal. PjCalc is Sony's tool and is very conservative.
I'm going to quote someone else because it's easier than typing myself: 
| ecrabb wrote: | | PJcalc is super conservative and was designed to be very forgiving for many different installations and less-than-careful installers. In our HTs where time isn't money, we can be much more exact about how we set them up. That's why you should use the "sunglasses / maximize-rasters" method - and pretty much ignore what the manual or PJcalc says. You can use PJ calc to get rough numbers but realize - it's could be as much as 10% on the long side for throw distance. |
Read more: http://www.curtpalme.com/forum/viewtopic.php?p=41473#41473
(He's one of our forum mods and owned a G70)
The "look in the tubes while adjusting width and moving the projector back and forth" is the method I recommend as well. I documented it about half way down this page:
http://www.curtpalme.com/TubeCondition_PoorInstall.shtm
Kal
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My basement/HT/bar/brewery build 2.0
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AFryia
Joined: 09 Mar 2006
Posts: 956
Location: S.E. Michigan VPH-G70Q
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| Link Posted: Thu Feb 09, 2017 11:44 pm Post subject: |
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| skidooseadoo wrote: | | kal wrote: | | skidooseadoo wrote: | | The projector is installed on the ceiling and its bang on IMO. |
Bang on how? How did you calculate the throw distance?
Reason I ask is if you used the Sony calculator / recommended throw, it's too far and you won't use enough phosphor/won't wear evenly/won't put out as much light/will wear faster than it should. Manufacturer recommended throw distances are very conservative.
More info: http://www.curtpalme.com/TubeCondition.shtm
(third page has the best way to determine correct throw distance)
Kal |
We used PjCal. It was 2" closer approx than the Sony Spec. |
In the "for what its' worth department" This is my actual setup with rasters very much maxed. You could scale your vertical height to mine and figure out a corresponding throw distance.
http://www.curtpalme.com/forum/album_page.php?pic_id=1152
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My Volt Blog
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 17860
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Link Posted: Fri Feb 10, 2017 2:28 am Post subject: |
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| AFryia wrote: | | In the "for what its' worth department" This is my actual setup with rasters very much maxed. You could scale your vertical height to mine and figure out a corresponding throw distance. |
Cool!
FYI however - it's the width that matters. Scale to fit the width. Tubes are 4x3 surfaces and we all tend to use 16x9 or wider screens these days so it's width that runs out first.
Kal
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Support our site by using our affiliate links. We thank you!
My basement/HT/bar/brewery build 2.0
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skidooseadoo
Joined: 01 Feb 2017
Posts: 10
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| Link Posted: Fri Feb 10, 2017 1:45 pm Post subject: |
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| kal wrote: | | skidooseadoo wrote: | | We used PjCal. It was 2" closer approx than the Sony Spec. |
That's what I was afraid of. It's too far back if you want to be optimal. PjCalc is Sony's tool and is very conservative.
I'm going to quote someone else because it's easier than typing myself:
| ecrabb wrote: | | PJcalc is super conservative and was designed to be very forgiving for many different installations and less-than-careful installers. In our HTs where time isn't money, we can be much more exact about how we set them up. That's why you should use the "sunglasses / maximize-rasters" method - and pretty much ignore what the manual or PJcalc says. You can use PJ calc to get rough numbers but realize - it's could be as much as 10% on the long side for throw distance. |
Read more: http://www.curtpalme.com/forum/viewtopic.php?p=41473#41473
(He's one of our forum mods and owned a G70)
The "look in the tubes while adjusting width and moving the projector back and forth" is the method I recommend as well. I documented it about half way down this page:
http://www.curtpalme.com/TubeCondition_PoorInstall.shtm
Kal |
Thanx Guys,
Looks like ill be moving the projector.
Its currently mounted at 107 1/4 from the screen face to the center of the PSS mount bolt.
Or 90 7/8 from the tube face to the center of the screen.
I thought I had it close!!!  (
That's with a 44x78 16:9 screen.
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 17860
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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