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Adding Composite/component/s-video inputs?
What would it take to add an input to a tv that did not come with said input? I have seen a YouTube video of a 70s RCA XL-100 table top with component jacks hacked into it. Has anybody undertaken such a project?
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Game Room TV's: 1997 RCA Colortrak 27" Console 1987 Zenith 19" V3912W |
#2
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Last edited by andy; 11-20-2021 at 03:14 PM. |
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Some tube sets will take a composite signal easily. Most Zenith and RCA tube color sets will take it decently after the detector.
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Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4 |
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Also Tube sets have no rejection circuits like solid state sets, and will display copy protection, which will also effect how things are viewed. Some copy protection is quite violent and will mess with the contrast, dimming and brightening it, which on a tube set with no amplifier makes it unwatchable. Some very early solid state sets also display the copy protection. For instance, The first 5" Sony Trinitron portable set from 1972, a KV5000, will display copy protection and has issues with it. The replacement for the KV5000, the 1976 KV5100, has no issues and can reject copy protection and displays a perfect, flawless image. |
#5
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I am definitely talking about solid state sets. Would a component-ready set take S-video relatively easily? Also, how would you access an "auxiliary" channel if there was not one on the tv's tuner or jungle ic?
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Game Room TV's: 1997 RCA Colortrak 27" Console 1987 Zenith 19" V3912W |
Audiokarma |
#6
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Why not just hook up an RF modulator?
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"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#7
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It's doable, but every conversion means a loss in quality. Plus video game systems can have terrible RF output
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Game Room TV's: 1997 RCA Colortrak 27" Console 1987 Zenith 19" V3912W |
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A good quality one, you will not be able to tell the difference that it's RF. The quality is simply that good. Mine is a model 15-2525, I couldn't find it on ebay, but it's the best money can buy so it's a little rare. I got really lucky and found it for a dollar at goodwill. |
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Seems like a heck of a lot less effort to me....
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"Restoring a tube TV is like going to war. A color one is like a land war in Asia." |
#10
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Supposedly you get a better picture. On Phil Nelson's website he shows a side by side comparison of a test pattern using composite and RF:
http://antiqueradio.org/A-V_AdapterForVintageTVs.htm |
Audiokarma |
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That's the point. We all know the older sets are as good as and mabye better than the later BPC sets in terms of quality, but not having AV really handicaps them. I have an 80s low line Zenith that I would love to hack a mono AV into. It would really make a good picture if it had a fresh CRT and RCA inputs.
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Game Room TV's: 1997 RCA Colortrak 27" Console 1987 Zenith 19" V3912W |
#12
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You can also use a VCR. VCRs usually have better than normal modulators and will give the best picture RF can deliver. For higher quality, you would have to put in a composite connection and some tubes simply won't be able to accept the signal.
Also they're cheaper. It'd be hard to convince that old tubes without even composite on the chassis had a better image than a set with composite inputs. The tubes were designed with the chosen input in mind unless they were shared. |
#13
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In theory, S-video would give the best picture, if you can figure out where it inject it. You'd have to find in the set where the separated luma and chroma signals are, what voltage amplitudes and polarity you'd need, and delay between the luma and chroma is needed (maybe zero).
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