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Hypno89
Joined: 06 Aug 2020
Posts: 13
Location: Czech Republic, Prague
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| Posted: Mon Aug 24, 2020 8:14 pm Post subject: Barco Genesis 7120a |
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Hello 
during my ebay browsing I repeatedly see offer of this projector:
https://www.ebay.de/itm/122776368235?mkcid=1&mkrid=707-53477-19255-0&siteid=77&campid=5337600554&toolid=20008&mkevt=1
It is a caligrapgic-crt projector used for simulation. I am curious about it, but unfortunately I didn’t find much technical information. So questions stands:
1) What is the specification of this projector? HScan, VScan, bandwidth.
2) In what regards it is different and superior to Barco 1209s?
3) Which components are shared with classic CRT projectors like 1209s, Cine 9, 909?
4) I started my interest in CRT projectors mainly because of gaming (no response, no motion blur, possibility of improving and gaining more refresh rate than at CRT monitors), beside watching movies. It is Barco 7120a usable in this way? If not, are there any possible modifications to be so?
Thank you
Hypno
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Mon Aug 24, 2020 9:41 pm Post subject: |
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Yup
These used LUG tubes but in "stoplight"" mode, you can't lay it flat and watch it. Parts are non-existent.
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Aug 24, 2020 10:31 pm Post subject: |
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I bought one of those for $150.. and $500 shipping to get it to me. Insanely complex unit, missing all 3 tubes, needed 220 volts to run on. I threw it out. 
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Hypno89
Joined: 06 Aug 2020
Posts: 13
Location: Czech Republic, Prague
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| Posted: Tue Aug 25, 2020 1:52 pm Post subject: |
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Thank you guys for information.
I read the thread, interesting. How far must be the screens curved? I guess it has to be at least a bit adjustable. Until some level of curve it would be acceptable for games.
It is possible to change the lenses for HD120 for example? The mounting of lenses seem different to BG 1209s and already not straight, but I am judging just from photo.
| Curt Palme wrote: | | I bought one of those for $150.. and $500 shipping to get it to me. Insanely complex unit, missing all 3 tubes, needed 220 volts to run on. I threw it out. Smile |
Power supply and getting there video signal is another story, except of other things. But would it be possible to do some hardware adjustment to get it working? I mean the people of your knowledge and experience, or Greg Eismann.
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Tue Aug 25, 2020 2:20 pm Post subject: |
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| Hypno89 wrote: | | I read the thread, interesting. How far must be the screens curved? I guess it has to be at least a bit adjustable. Until some level of curve it would be acceptable for games. |
No idea, but it's usually pretty extreme.
| Quote: | | It is possible to change the lenses for HD120 for example? The mounting of lenses seem different to BG 1209s and already not straight, but I am judging just from photo. |
Again, no idea.
| Curt Palme wrote: | | I bought one of those for $150.. and $500 shipping to get it to me. Insanely complex unit, missing all 3 tubes, needed 220 volts to run on. I threw it out. Power supply and getting there video signal is another story, except of other things. But would it be possible to do some hardware adjustment to get it working? I mean the people of your knowledge and experience, or Greg Eismann. |
You can certainly try anything you like, but keep in mind that board level techs like Curt threw out units like this and they have (or had) every CRT board and part in existence in the world. That should give you some idea of the success rate you should expect. 
Use the forum search feature for previous discussions on CRT projectors used in simulators. You'll find tons of discussion that goes back years. Usually the exact same questions as you when someone finds something available for sale for cheap (or free) and is wondering how to make it work for regular HT use.
Kal
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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: Tue Aug 25, 2020 5:15 pm Post subject: |
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| Tim in Phoenix wrote: | Yup
These used LUG tubes but in "stoplight"" mode, you can't lay it flat and watch it. Parts are non-existent. |
This was the unit used for projecting the HUD and the bad guys wasn't it?
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Tech support for nothing
CRT.
HD done right!
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banzairun
Joined: 10 Jul 2006
Posts: 129
Location: NJ
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| Posted: Wed Aug 26, 2020 11:45 pm Post subject: |
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| AnalogRocks wrote: |
This was the unit used for projecting the HUD and the bad guys wasn't it? |
They are for "level D" flight simulators. Typically 3 of them arranged on the top of the sim, firing onto the screens, which is why they are vertically oriented. These projectors do a vector (calligraphic) scan in the vertical interval to highlight certain things to bring more realism to the image.
Say, if you were doing a landing in an B744 sim from the 90s, things in the projected image you might see like runway lighting would be brightened by the vector scan, since it can slow the beams over the phosphor for a longer period of time.
It's an interesting effect that you kinda need to see in person.
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