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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Tue Nov 22, 2011 5:54 pm Post subject: Mirror |
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Hi Guys,
I'm moving into an apartment and need to find a new way to install my projector (NEC XG110LC). I would like to mount it vertically in a hush box with a mirror immediately above the projector. To accomplish this I need a first surface mirror. I haven't been able to find an inexpensive mirror locally.
I was wondering if one of you forum members would happen to have such a mirror that they would be willing to let go for a reasonable price. Please let me know.
Brian
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Nov 22, 2011 7:01 pm Post subject: |
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Try to find a worn out CRT RPTV, they are equiped with very good mirrors.
_________________
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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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Tue Nov 22, 2011 9:00 pm Post subject: |
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Thanks gjaky,
I've looked around on craigslist and kijiji here in Montreal and for some reason everyone seems to think that their 480p 50" TVs are still worth 200$  Needless to say I haven't had too much luck looking for used ones.
So if anyone has one they think might work please give me a shout!
Brian
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Nov 22, 2011 9:09 pm Post subject: |
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 Here in Hungary I can get free mirror, but CRT projectors are often overpriced... (or we have less money to afford it)
_________________
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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opv
Joined: 18 May 2010
Posts: 202
Location: Emek Hefer,Israel
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| Posted: Wed Nov 23, 2011 7:13 am Post subject: |
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Hi MrGogo,
I have one I'll be happy to give for free, it's also mounted in a aluminium frame for vertical mounting, but I live in Israel... 
Just a word of advice regarding vertical mounting, I mounted my previous PJ, BG808s vertically and I got a very large picture, but no matter what I tried I couldn't get a picture quality I could live with.
First of all, any tension on the mirror causes terrible artifacts on the picture.
The light that comes back from the screen to the mirror causes a huge degradation in contrast.
And last of all, the picture was too big for the room, so I had to use less phosphor to shrink it, and the sharpness was terrible.
My current BG1209s, is mounted to the ceiling, the picture is relatively small, 80" at 16:9, but the picture is amazing.
Regards,
Or
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Wed Nov 23, 2011 3:03 pm Post subject: |
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Hi Or,
I had never thought about the light bouncy back off the mirror. But I'm still going to give it a try. Unfortunately ceiling mounting is out of the question because I'm going to be renting the apartment and I don't think my land lord would appreciate holes in her ceiling! I wonder how much it would cost to ship the mirror from Israel to Canada, I suspect a lot, it probably wouldn't be worth it.
Any North American's got a old front surface mirror needing a good home?
Thanks,
Brian
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Nov 23, 2011 3:48 pm Post subject: |
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If you do come across a RPTV check the mirror type before you buy. Some of the later models use a material with a mirror like coating. Looks like a mirror but it's stretched material and very flexible. Mounting would be critical.
And some dont use first surface.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Nov 23, 2011 4:04 pm Post subject: |
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| macgyver655 wrote: | If you do come across a RPTV check the mirror type before you buy. Some of the later models use a material with a mirror like coating. Looks like a mirror but it's stretched material and very flexible. Mounting would be critical.
And some dont use first surface. |
Was going to say this as well, ive opened up a few with something simular to what you speak of, and i have also seen a few that use a plain glass mirror, and not a first surface ( numerous Sega 50 inch arcade cabs i have seen the plain glass mirror in, Mitsubishi sets in most.... ).
I had an LG open just over a week ago that had a plastic first surface mirror that would do the job, mounting would still be pretty critical cause it was still flexy. This set had P16 tubes in it too...
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Wed Nov 23, 2011 4:09 pm Post subject: |
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| CasetheCorvetteman wrote: | | macgyver655 wrote: | If you do come across a RPTV check the mirror type before you buy. Some of the later models use a material with a mirror like coating. Looks like a mirror but it's stretched material and very flexible. Mounting would be critical.
And some dont use first surface. |
Was going to say this as well, ive opened up a few with something simular to what you speak of, and i have also seen a few that use a plain glass mirror, and not a first surface.
I had an LG open just over a week ago that had a plastic first surface mirror that would do the job, mounting would still be pretty critical cause it was still flexy. This set had P16 tubes in it too... |
Did you know that when RPTV's first came out some used what looked like aluminum foil. If you fiddled with it, it would wrinkle just like foil. And felt like it too. Maybe they had stock in Reynolds wrap, lol.....
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Wed Nov 23, 2011 4:25 pm Post subject: |
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Hey Guys,
Thanks for the advice, I was planning on fixing it to a piece of MDF with some spray glue so that there wouldn't be any distortion. Has anyone tried a glass mirror? This is only going to be temporary (if you can consider 1.5years temporary) How bad would the ghosting be with a regular mirror?
Brian
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noos@xp37+
Joined: 17 Jun 2008
Posts: 464
Location: Berlin/Munich
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| Posted: Wed Nov 23, 2011 5:17 pm Post subject: |
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Try to get the mirrors from Sony RVP professional rear projectors. I have some, but you can forget it to ship them save to Canada from Germany.
Super high grade, no distortions, no halos....nothing. Two sizes inside, oneis the minimal size for 7" AC and 8" LC, and one for 9". Both on plasic frames.
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Nov 24, 2011 2:07 am Post subject: |
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| macgyver655 wrote: | | CasetheCorvetteman wrote: | | macgyver655 wrote: | If you do come across a RPTV check the mirror type before you buy. Some of the later models use a material with a mirror like coating. Looks like a mirror but it's stretched material and very flexible. Mounting would be critical.
And some dont use first surface. |
Was going to say this as well, ive opened up a few with something simular to what you speak of, and i have also seen a few that use a plain glass mirror, and not a first surface.
I had an LG open just over a week ago that had a plastic first surface mirror that would do the job, mounting would still be pretty critical cause it was still flexy. This set had P16 tubes in it too... |
Did you know that when RPTV's first came out some used what looked like aluminum foil. If you fiddled with it, it would wrinkle just like foil. And felt like it too. Maybe they had stock in Reynolds wrap, lol..... |
Ha!! never seen anything that old myself, in the mid to late 90s we started getting a few different brands of rear pro CRTs coming in way under the cost of a Panasonic or Sony, General Electric was one i remember opening up wayyyyy back, AC coupled, glass regular mirror, full on analog convergence with the trim pots on the back left hand side... Picture was total rubish... If you werent right in front at the right distance and right height, the picture was real dim.....
MrGogo, this mirror i saw in the LG had screws down the sides, 2 or 3 a side i didnt really take much notice, so you could just screw it to the MDF and it would be fine. I know the Panasonic GAOO sets had something very simular to that, and so did the Toshiba.
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Thu Nov 24, 2011 8:42 pm Post subject: |
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Hey Guys,
Gary that is exactly what I have in mind! I want to make a box out of black particle board melamine to hold the projector all on locking casters so I can move it around easily with some sound absorbing materials padding the inside and low speed fans blowing up from the bottom to help cool it, why fight convection right. Then mount the mirror above it. I read the thread you linked to on the AVSforum, (Wow been a long time since I wandered over there) and he said he was using a regular mirror. I guess the only way to know how bad the ghosting is would be to try it.
Its encouraging to see someone else actually do it. I'll post some pictures when I get it setup. Theres still lost of other stuff to do before I move in.
Brian M.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Fri Nov 25, 2011 2:30 am Post subject: |
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I doubt youll see much if any ghosting, youll just not get the same brightness from it.
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garyfritz
Joined: 08 Apr 2006
Posts: 12088
Location: Fort Collins, CO
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| Posted: Fri Nov 25, 2011 3:59 am Post subject: |
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You could ask Paul (-Pjackso). He's still around in this forum, though not real active.
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-Pjackso
Joined: 31 Mar 2006
Posts: 791
Location: Oklahoma
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| Posted: Fri Nov 25, 2011 7:18 pm Post subject: |
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Hi guys,
...sorry for not being so 'active'. Between my 2-yr old, classes for my masters degree, work, and other family requirements - I don't have much extra free time.
Anyways, regarding the mirror approach. If you use a regular mirror, you WILL see some ghosting. Mostly in the vertical axis. You'll see a faint ghost about 1/2 'pixel' above and below. It'll be faint, but it will be there. On my original setup, the picture was huge (11 ft wide), and hence the light output was on the lower edge (dimmer) of viewing preference. Nice thing about that was that the ghosting was even dimmer - and hence I didn't notice it.
We recently moved to another house, and the picture was reduce to more normal size (8-ft wide). The light output was much better, but unfortunately the ghosting was much more noticable (brighter).
In short, depending on your circumstance - expect some ghosting. It'll still be a very watchable picture, but it'll be 'soft' regardless of how well you focus it.
I never found a first-surface mirror, so i can't comment. But a first-surface mirror should eliminate the 1st and 2nd refractive ghosting images.
...Also, I wouldn't put your hush-box on casters. Once you find the right location, you most likely won't move it for months - if not years.
enjoy!
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-Nothing relevant to add.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Nov 26, 2011 3:36 am Post subject: |
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Thats a 2nd on the castors, bad idea that!! Move it a couple mil and youre going through the setup again 
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MrGogo
Joined: 07 Sep 2006
Posts: 21
Location: MTL, QC
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| Posted: Wed Nov 30, 2011 4:38 pm Post subject: |
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Hi Guys,
Thanks for the feedback. I guess I will try it out and see how it goes. Hopefully I will be able to get to work building it this weekend, but i need to get some friends over to help me get the projector down from the ceiling.
What do you guys think about 4 locking casters? You guys are probably right. I won't exactly be moving it around a lot once its setup. I just really like putting casters on everything I build because it make it SOOO much easier to move heavy things. Ever since a buddy of mine said he wouldn't help me build my MAME arcade cabinet unless we put casters on it I realized just how great they are on heavy objects.
-Pjackso do you have any pictures of your previous or current setup. I'd love to get some inspiration from someone who has actually put one of these setups together.
Brian
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Thu Dec 01, 2011 12:32 am Post subject: |
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No casters. None. Not any. You dont want them...
Use some adjustable feet instead.
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