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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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 Link Posted: Tue May 05, 2009 3:34 am Post subject: Ampro Lens Flapping |
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Ampro owners might be able to help with this.
I was thinking of adding lens flapping to my PJ and I have a complete setup from a 4000. My question revolves arround the way Ampro have designed the lens and LC tank. Since its the lens that moves there must be a gap between the rear of the lens and the the C element on the LC tank. How do you keep dust out of this gap as there doesn't seem to be anything that actually seals this area or have I missed something??
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cmjohnson
Joined: 03 Apr 2006
Posts: 1677
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| Link Posted: Wed May 13, 2009 1:59 am Post subject: |
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You're not missing anything. It's how AmPro did it.
To provide some measure of dust rejection, you can get thin blankets of silicone rubber (in black, ideally) and use them to form an air
seal around the system.
If you can't find silicone rubber blankets, just take a few pieces of canvas and cover them in a thin layer of black silicone RTV.
CJ
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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Wed May 13, 2009 7:46 am Post subject: |
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Thanks CJ
Just wondering if the benefits out weigh the problems. I might yet just stay with the Barco LC tanks.
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Mark_A_W
Joined: 15 Mar 2006
Posts: 3068
Location: Sunny Melbourne Australia
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| Link Posted: Wed May 13, 2009 8:49 am Post subject: |
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Umm...duct tape?
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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Wed May 13, 2009 9:21 am Post subject: |
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I can't understand the thinking at Ampro about this. Then again they are have gone out of business. How could they leave such an important part of the projection system open to dust and any other foriegn material that might find its way behind the lens. Duct tape aside you would think the lens system would be factory sealed.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 18074
Location: Langley, BC
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| Link Posted: Wed May 13, 2009 2:43 pm Post subject: |
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THe only set I've had issues with regarding dust between the tube and lens are the Sony 12XX series (air coupled).
Never had any issues with any dust getting into the small gap in an Ampro LC Unit.
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stefuel
Joined: 07 Mar 2006
Posts: 3205
Location: Green Harbor MA USA
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| Link Posted: Wed May 13, 2009 9:23 pm Post subject: |
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| km987654 wrote: | | I can't understand the thinking at Ampro about this. Then again they are have gone out of business. How could they leave such an important part of the projection system open to dust and any other foriegn material that might find its way behind the lens. Duct tape aside you would think the lens system would be factory sealed. |
You won't have to worry about it as you'll never own one.  Dust will get in there but it is no worse off than any AC projector. The dust that eventually does get in there is out of the focal point and won't be seen on screen. As far as AmPro being "out of business" I beg to differ. VDC is still producing them for the military along with the Marquee line. However, Barco and Sony have $hit the bed in the CRT market so stick that in your pipe and smoke 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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perisoft
Joined: 29 Aug 2007
Posts: 2903
Location: Ithaca, NY
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| Link Posted: Thu May 14, 2009 1:44 am Post subject: |
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| km987654 wrote: | | I can't understand the thinking at Ampro about this. |
Well, they figure that a little dust in there hardly matters if the damn thing never turns on to begin with... 
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AnalogRocks
Moderator
Joined: 08 Mar 2006
Posts: 20968
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Link Posted: Thu May 14, 2009 1:48 am Post subject: |
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| perisoft wrote: | | km987654 wrote: | | I can't understand the thinking at Ampro about this. |
Well, they figure that a little dust in there hardly matters if the damn thing never turns on to begin with... |
HEY NOW!! THey turn on! Then they make a pretty blue/purple arc and the lights in my appartment go out.
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CRT.
HD done right!
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stefuel
Joined: 07 Mar 2006
Posts: 3205
Location: Green Harbor MA USA
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| Link Posted: Thu May 14, 2009 2:25 am Post subject: |
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| perisoft wrote: | | km987654 wrote: | | I can't understand the thinking at Ampro about this. |
Well, they figure that a little dust in there hardly matters if the damn thing never turns on to begin with... |
So I have to ask. Is this from your own experiance OR is this just the ramblings of yet another clueless AmPro basher AKA z-photo converts
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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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perisoft
Joined: 29 Aug 2007
Posts: 2903
Location: Ithaca, NY
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| Link Posted: Thu May 14, 2009 2:45 am Post subject: |
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| stefuel wrote: | | perisoft wrote: | | km987654 wrote: | | I can't understand the thinking at Ampro about this. |
Well, they figure that a little dust in there hardly matters if the damn thing never turns on to begin with... |
So I have to ask. Is this from your own experiance OR is this just the ramblings of yet another clueless AmPro basher AKA z-photo converts |
Oh, hell, I've never laid eyes on one of them, but I know a good opportunity to sharpen my tongue when I see it! 
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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Thu May 14, 2009 9:16 am Post subject: |
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| stefuel wrote: | | km987654 wrote: | | I can't understand the thinking at Ampro about this. Then again they are have gone out of business. How could they leave such an important part of the projection system open to dust and any other foriegn material that might find its way behind the lens. Duct tape aside you would think the lens system would be factory sealed. |
You won't have to worry about it as you'll never own one. Dust will get in there but it is no worse off than any AC projector. The dust that eventually does get in there is out of the focal point and won't be seen on screen. As far as AmPro being "out of business" I beg to differ. VDC is still producing them for the military along with the Marquee line. However, Barco and Sony have $hit the bed in the CRT market so stick that in your pipe and smoke it |
Its always the same extremists do more damage to their cause than good. This was basically just a technical question with a flippant remark to get interest it doesn't require the extremist Bull Sh!t that pours so redily from some peoples keyboards. Dust in the lens system does matter as enough of the stuff will effect brightness and probably contrast. You couldn't possibly know what I could own but you make stupid statements anyway. Based on your attitude the five Ampros I dissmantled for parts was probably the best thing I could have done so stick that in your extremist pipe and puff hard!!
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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Thu May 14, 2009 9:21 am Post subject: |
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| Curt Palme wrote: | THe only set I've had issues with regarding dust between the tube and lens are the Sony 12XX series (air coupled).
Never had any issues with any dust getting into the small gap in an Ampro LC Unit. |
Thanks for this Curt its just what I wanted to know.
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stefuel
Joined: 07 Mar 2006
Posts: 3205
Location: Green Harbor MA USA
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| Link Posted: Fri May 15, 2009 9:23 pm Post subject: |
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Hey everybody, I'm a "extremist"?
What does my attitude have to do with you're parting out of "five" AmPro's? Did you part out five 4600's or five 4000G's???
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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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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Fri May 15, 2009 11:11 pm Post subject: |
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Well Chip I have read a lot of threads with posts from you and you have very strong views on Ampros. Those views are probably made even stronger by the ribbing others give Ampro projectors so to some degree I can understand your position. It gets a bit much though when you try to tell me or anyone else that "You won't have to worry about it as you'll never own one" and its that type of statement that in my view makes your views extreme. For the record it was 5 4000G.
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stefuel
Joined: 07 Mar 2006
Posts: 3205
Location: Green Harbor MA USA
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| Link Posted: Sat May 16, 2009 4:09 am Post subject: |
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I have very strong views about negative comments made by people about a projector they've never seen before. So what's more extreme, a person badmouthing a projector they've never seen before or the owner of the exact modle in question defending it. The only thing in common a 4000G has with a 4600 is the name. Nine times out of ten, when I back someone in a corner about their comments, they break down and admit they've never actually even seen one and are basing their comments on what they've heard. I don't know if you are basing your negative comments on your experiance with the 4000G's or what you have heard by others. Either way, you are mis-informed and wrong. Spreading rumors is wrong. If you think pointing it out is extreme then I guess I'm extreme and there isn't a damn thing you have to say that will change it. This conversation is over for me as you don't have the experiance with projector I'm talking about. Have a nice weekend.
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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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km987654
Joined: 25 Jul 2007
Posts: 1561
Location: Australia
TV/Projector: Barco BG808s 9
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| Link Posted: Sat May 16, 2009 4:29 am Post subject: |
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| stefuel wrote: | | I have very strong views about negative comments made by people about a projector they've never seen before. So what's more extreme, a person badmouthing a projector they've never seen before or the owner of the exact modle in question defending it. The only thing in common a 4000G has with a 4600 is the name. Nine times out of ten, when I back someone in a corner about their comments, they break down and admit they've never actually even seen one and are basing their comments on what they've heard. I don't know if you are basing your negative comments on your experiance with the 4000G's or what you have heard by others. Either way, you are mis-informed and wrong. Spreading rumors is wrong. If you think pointing it out is extreme then I guess I'm extreme and there isn't a damn thing you have to say that will change it. This conversation is over for me as you don't have the experiance with projector I'm talking about. Have a nice weekend. |
There you go again. You know it all and clearly in your mind others don't know much. I don't recall comparing any Ampro to any other Ampro. I have no negative comments about Ampro, personally I think they are hard done by by most, my flipant remark about the company was just that and nothing more.
I have owned the projector I was commenting on and asking a technical question about, in fact I have owned 5 of them and its clear that when your backed into a corner your only come back is "This conversation is over".
Not sure what you are refering to when you refer to rumours.
IMO I doubt I would be the first or last to see your views as extreme.
Thanks for the nice weekend wish I will take it.
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