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fuchs
Joined: 27 Jun 2012
Posts: 153
Location: the NL
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| Posted: Tue Dec 11, 2012 9:53 pm Post subject: |
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| Runslikeapenguin wrote: | Well a trip to Radioshack, and a wallet rape (As usual) has yielded success!
BNC to RCA to S video |
it works!
Well keep in mind that cheap s-video-> video adapters , like you bought, are technically not even supposed to exist and are about the worst possible solution to get an image on screen. Some of them don't even manage to produce colour images at all. It does prove, however, that the projector does 'something'  which is a good start.
Another thing to keep in mind is that cranking the 'contrast' setting on the projector all the way up, will most likely result in bad focus whatever you try.
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onkel fuchs' cheapskate cinema
NEC plain 9PG
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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: Tue Dec 11, 2012 9:56 pm Post subject: |
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An old CRT projector is always going to appear to be soft compared to a digital display. There are lens focusing adjustments on each lens, and there are electronic focusing adjustments under the top cover. The rest of the alignment needed is called convergence, and that's done with those 30-40 controls under the cover as well.
A big note regarding convergence. There are probably 3-4 unmarked trimpots under the top cover, more if you look at other PC boards away from the convergence controls. DO NOT tweak those unmarked pots! I did it a few years ago with a PT-201, a slightly higher end version of the 101, thinking I could correct a couple of issues. End result? It took 6 hours of following the service manual to get the unmarked pots to the correct settings with scopes and meters to undo the mess I did in 30 seconds. 
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Tue Dec 11, 2012 10:28 pm Post subject: |
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| fuchs wrote: | | Well keep in mind that cheap s-video-> video adapters , like you bought, are technically not even supposed to exist and are about the worst possible solution to get an image on screen. Some of them don't even manage to produce colour images at all. |
Huh? The cable he posted was an s-video to BNC Y/C cable. There is nothing hinky about that - it's just converting from one physical connector to another. I used the same cable for years to connect a prosumer video camera with s-video output to a professional desktop monitor with BNC Y/C input.
SC
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fuchs
Joined: 27 Jun 2012
Posts: 153
Location: the NL
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| Posted: Tue Dec 11, 2012 10:43 pm Post subject: |
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| ecrabb wrote: | | Huh? The cable he posted was an s-video to BNC Y/C cable. There is nothing hinky about that - it's just converting from one physical connector to another. I used the same cable for years to connect a prosumer video camera with s-video output to a professional desktop monitor with BNC Y/C input. SC |
Oh. It's a dual-BNC indeed. You are right.
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onkel fuchs' cheapskate cinema
NEC plain 9PG
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Dec 12, 2012 1:58 am Post subject: |
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| gjaky wrote: | | Runslikeapenguin wrote: |
The game console would be a great way to test this because i happen to have every game console ever made here in my house right now, going all the way back to an OG Nintendo, however none of them have BNC connectors. Only the OG Nintendo has a coax cable and thats not the same as BNC right? But if i get the BNC to RCA converters i could hook up one of the game systems. |
HAHA, CasetheCorvetteman will be you new best friend 
That wallmart s-video to BNC cable looks fine for hoking it up. |
Yeah mate, he must be a somewhat decent bloke if he has every retro console
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Runslikeapenguin
Joined: 11 Dec 2012
Posts: 9
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| Posted: Wed Dec 12, 2012 8:32 am Post subject: |
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I'm going to attempt to hook this beast up to an X-box right now using the RGB adapters to see if the quality gets any better.
But as for focus, I'm going to have to pick an exact distance from a white wall or backdrop and focus it specifically on that point for everything to be dialed in right? I mean if i take the cover off to focus the lenses.
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Runslikeapenguin
Joined: 11 Dec 2012
Posts: 9
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| Posted: Wed Dec 12, 2012 8:52 am Post subject: |
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So the RGB inputs for the Xbox work but only in 480i mode. BUT the blue channel is dead apparently. Doesn't even light up when the Xbox is plugged into it.
next try is a nintendo.
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Runslikeapenguin
Joined: 11 Dec 2012
Posts: 9
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| Posted: Wed Dec 12, 2012 9:09 am Post subject: |
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Can't find my 10v power adapter for my SNES so Genesis it is.
quality looks pretty decent for not being focused and not being set up. Way better than the S video in.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Wed Dec 12, 2012 9:29 am Post subject: |
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Yeah mate, the Mega Drive is incredibly sharp in RGB, its hardly wirth the effort to do the mid to get the s-video from it. The SNES RGB will be softer due to the design of the console its self.
You absolutely have to line it up with the wall nice and square and also the right distance back for whatever phosphor youre using.
Start with the adjustment closest to the tubes, then the front adjustment which does the outer focus, go between the 2 and get them both dialed in. Im not sure if the phosphor grain / binoculars method will work with those lenses.
Youll probably need to look at the astigmatism too, if its simular to the comparable Sony machines, its very easy to set and takes hardly any time.
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