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#1
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Component video really need 75 ohm cable?
Hi Folks,
I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan |
#2
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan Why do you think the "regular" cable is not 75 ohm? -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#3
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan Why do you think the "regular" cable is not 75 ohm? -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#4
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan Why do you think the "regular" cable is not 75 ohm? -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#5
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan Why do you think the "regular" cable is not 75 ohm? -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#6
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Component video really need 75 ohm cable?
CJ,
Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan |
#7
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Component video really need 75 ohm cable?
CJ,
Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan |
#8
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Component video really need 75 ohm cable?
CJ,
Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan |
#9
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Component video really need 75 ohm cable?
CJ,
Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan |
#10
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Component video really need 75 ohm cable?
There are reasonably priced 3-up 75 ohm RCA connector cable sets for
component video. I've seen some from GE or maybe it was RCA for around $15 if memory serves right. the "video" cable in your composite video/stereo cable set is likely 75 ohm already. the audio channels may or may not be, same for the connectors. Look for ghosts or lines parallel to edges in the image. These would be indicative of reflections caused by impedance mismatch. Cheap lossy cables could also cause a loss of sharpness of the image. Don't buy monster cables. Very excessive profit there. The GE or RCA ones are fine at a good price. "François Yves Le Gal" wrote in message ... On Tue, 4 May 2004 13:47:42 -0400, "Ethan Winer" ethanw at ethanwiner dot com wrote: Hence the question as to whether cables in this particular application really do matter. Using quality 75-ohm coax could help, yes. But you don't have to buy any of those "premium" videophile cables: get some serious industrial stuff. |
#11
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Component video really need 75 ohm cable?
There are reasonably priced 3-up 75 ohm RCA connector cable sets for
component video. I've seen some from GE or maybe it was RCA for around $15 if memory serves right. the "video" cable in your composite video/stereo cable set is likely 75 ohm already. the audio channels may or may not be, same for the connectors. Look for ghosts or lines parallel to edges in the image. These would be indicative of reflections caused by impedance mismatch. Cheap lossy cables could also cause a loss of sharpness of the image. Don't buy monster cables. Very excessive profit there. The GE or RCA ones are fine at a good price. "François Yves Le Gal" wrote in message ... On Tue, 4 May 2004 13:47:42 -0400, "Ethan Winer" ethanw at ethanwiner dot com wrote: Hence the question as to whether cables in this particular application really do matter. Using quality 75-ohm coax could help, yes. But you don't have to buy any of those "premium" videophile cables: get some serious industrial stuff. |
#12
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Component video really need 75 ohm cable?
There are reasonably priced 3-up 75 ohm RCA connector cable sets for
component video. I've seen some from GE or maybe it was RCA for around $15 if memory serves right. the "video" cable in your composite video/stereo cable set is likely 75 ohm already. the audio channels may or may not be, same for the connectors. Look for ghosts or lines parallel to edges in the image. These would be indicative of reflections caused by impedance mismatch. Cheap lossy cables could also cause a loss of sharpness of the image. Don't buy monster cables. Very excessive profit there. The GE or RCA ones are fine at a good price. "François Yves Le Gal" wrote in message ... On Tue, 4 May 2004 13:47:42 -0400, "Ethan Winer" ethanw at ethanwiner dot com wrote: Hence the question as to whether cables in this particular application really do matter. Using quality 75-ohm coax could help, yes. But you don't have to buy any of those "premium" videophile cables: get some serious industrial stuff. |
#13
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Component video really need 75 ohm cable?
There are reasonably priced 3-up 75 ohm RCA connector cable sets for
component video. I've seen some from GE or maybe it was RCA for around $15 if memory serves right. the "video" cable in your composite video/stereo cable set is likely 75 ohm already. the audio channels may or may not be, same for the connectors. Look for ghosts or lines parallel to edges in the image. These would be indicative of reflections caused by impedance mismatch. Cheap lossy cables could also cause a loss of sharpness of the image. Don't buy monster cables. Very excessive profit there. The GE or RCA ones are fine at a good price. "François Yves Le Gal" wrote in message ... On Tue, 4 May 2004 13:47:42 -0400, "Ethan Winer" ethanw at ethanwiner dot com wrote: Hence the question as to whether cables in this particular application really do matter. Using quality 75-ohm coax could help, yes. But you don't have to buy any of those "premium" videophile cables: get some serious industrial stuff. |
#14
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Component video really need 75 ohm cable?
Rocky,
around $15 if memory serves right. Yeah, that's more like it. The store I deal with is not big into wire gouging, and the video cables they offered were $50. But I know full well that "even" $50 is excessive, which is why I refused. Don't buy monster cables. Very excessive profit there. Believe me, I'm quite aware of that, and I spend a lot of time explaining to folks that heavy enough lamp cord is every bit as good as $1,000 speaker cables. But I'm new to high-res video and it makes sense that 75 Ohms may really be needed. NOT expensive cable! Just 75 Ohms. If I weren't so darn lazy I'd just make the cables myself... Thanks. --Ethan |
#15
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Component video really need 75 ohm cable?
Rocky,
around $15 if memory serves right. Yeah, that's more like it. The store I deal with is not big into wire gouging, and the video cables they offered were $50. But I know full well that "even" $50 is excessive, which is why I refused. Don't buy monster cables. Very excessive profit there. Believe me, I'm quite aware of that, and I spend a lot of time explaining to folks that heavy enough lamp cord is every bit as good as $1,000 speaker cables. But I'm new to high-res video and it makes sense that 75 Ohms may really be needed. NOT expensive cable! Just 75 Ohms. If I weren't so darn lazy I'd just make the cables myself... Thanks. --Ethan |
#16
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Component video really need 75 ohm cable?
Rocky,
around $15 if memory serves right. Yeah, that's more like it. The store I deal with is not big into wire gouging, and the video cables they offered were $50. But I know full well that "even" $50 is excessive, which is why I refused. Don't buy monster cables. Very excessive profit there. Believe me, I'm quite aware of that, and I spend a lot of time explaining to folks that heavy enough lamp cord is every bit as good as $1,000 speaker cables. But I'm new to high-res video and it makes sense that 75 Ohms may really be needed. NOT expensive cable! Just 75 Ohms. If I weren't so darn lazy I'd just make the cables myself... Thanks. --Ethan |
#17
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Component video really need 75 ohm cable?
Rocky,
around $15 if memory serves right. Yeah, that's more like it. The store I deal with is not big into wire gouging, and the video cables they offered were $50. But I know full well that "even" $50 is excessive, which is why I refused. Don't buy monster cables. Very excessive profit there. Believe me, I'm quite aware of that, and I spend a lot of time explaining to folks that heavy enough lamp cord is every bit as good as $1,000 speaker cables. But I'm new to high-res video and it makes sense that 75 Ohms may really be needed. NOT expensive cable! Just 75 Ohms. If I weren't so darn lazy I'd just make the cables myself... Thanks. --Ethan |
#18
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. It's all about length. One meter? No sweat! 50 feet? 75 ohm seems to be in order. BTW, I wouldn't be so sanguine about impedance mismatch if this was high res, high-refresh computer video. |
#19
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. It's all about length. One meter? No sweat! 50 feet? 75 ohm seems to be in order. BTW, I wouldn't be so sanguine about impedance mismatch if this was high res, high-refresh computer video. |
#20
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. It's all about length. One meter? No sweat! 50 feet? 75 ohm seems to be in order. BTW, I wouldn't be so sanguine about impedance mismatch if this was high res, high-refresh computer video. |
#21
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Component video really need 75 ohm cable?
Ethan Winer wrote:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. It's all about length. One meter? No sweat! 50 feet? 75 ohm seems to be in order. BTW, I wouldn't be so sanguine about impedance mismatch if this was high res, high-refresh computer video. |
#22
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Component video really need 75 ohm cable?
Ethan Winer wrote:
CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#23
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Component video really need 75 ohm cable?
Ethan Winer wrote:
CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#24
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Component video really need 75 ohm cable?
Ethan Winer wrote:
CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#25
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Component video really need 75 ohm cable?
Ethan Winer wrote:
CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Seriously, the component video looks okay, and is slightly better than the composite output. Mostly the colors are better and less washed-out looking. I was also expecting a meaningful improvement in overall sharpness and clarity, and I'm not getting that. Hence the question as to whether cables in this particular application really do matter. I *know* that cables don't matter most of the time even though audio stores try to convince you they do. Thanks. --Ethan -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
#26
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Component video really need 75 ohm cable?
CJT wrote:
Ethan Winer wrote: CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Right. If you are going some distance, RG6 with copper core would be more appropriate. If the environment is noisy, double or triple shielding might be in order. BTW, none of this stuff costs serious money. Markertek would cut and terminate for a reasonable cost. |
#27
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Component video really need 75 ohm cable?
CJT wrote:
Ethan Winer wrote: CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Right. If you are going some distance, RG6 with copper core would be more appropriate. If the environment is noisy, double or triple shielding might be in order. BTW, none of this stuff costs serious money. Markertek would cut and terminate for a reasonable cost. |
#28
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Component video really need 75 ohm cable?
CJT wrote:
Ethan Winer wrote: CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Right. If you are going some distance, RG6 with copper core would be more appropriate. If the environment is noisy, double or triple shielding might be in order. BTW, none of this stuff costs serious money. Markertek would cut and terminate for a reasonable cost. |
#29
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Component video really need 75 ohm cable?
CJT wrote:
Ethan Winer wrote: CJ, Why do you think the "regular" cable is not 75 ohm? Well, I know what RG59 looks like, and the thin RCA cables I'm using now ain't them. :-) Well, RG59 isn't the only 75 ohm cable made. Right. If you are going some distance, RG6 with copper core would be more appropriate. If the environment is noisy, double or triple shielding might be in order. BTW, none of this stuff costs serious money. Markertek would cut and terminate for a reasonable cost. |
#30
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Component video really need 75 ohm cable?
Here is a website that seems to be a reasonably accurate answer to
your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. When plugging in the P'b and P'r, do you see a loss in image detail and are there color distortions in the fine detail? If so, the audio cables may be degrading the color information. The above website suggests that you are not likely to have a significant problem and with good reason: The color channel bandwidths are signficantly lower than the luminance component. The human visual system has much better spatial resolution with respect to luminance than to color. Of course, you might also consider a DIY cable set. Given your absolutely outstanding technical qualifications, this would be a trivial (but annoying) undertaking! :-) "Ethan Winer" ethanw at ethanwiner dot com wrote in message ... Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan |
#31
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Component video really need 75 ohm cable?
Here is a website that seems to be a reasonably accurate answer to
your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. When plugging in the P'b and P'r, do you see a loss in image detail and are there color distortions in the fine detail? If so, the audio cables may be degrading the color information. The above website suggests that you are not likely to have a significant problem and with good reason: The color channel bandwidths are signficantly lower than the luminance component. The human visual system has much better spatial resolution with respect to luminance than to color. Of course, you might also consider a DIY cable set. Given your absolutely outstanding technical qualifications, this would be a trivial (but annoying) undertaking! :-) "Ethan Winer" ethanw at ethanwiner dot com wrote in message ... Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan |
#32
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Component video really need 75 ohm cable?
Here is a website that seems to be a reasonably accurate answer to
your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. When plugging in the P'b and P'r, do you see a loss in image detail and are there color distortions in the fine detail? If so, the audio cables may be degrading the color information. The above website suggests that you are not likely to have a significant problem and with good reason: The color channel bandwidths are signficantly lower than the luminance component. The human visual system has much better spatial resolution with respect to luminance than to color. Of course, you might also consider a DIY cable set. Given your absolutely outstanding technical qualifications, this would be a trivial (but annoying) undertaking! :-) "Ethan Winer" ethanw at ethanwiner dot com wrote in message ... Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan |
#33
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Component video really need 75 ohm cable?
Here is a website that seems to be a reasonably accurate answer to
your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. When plugging in the P'b and P'r, do you see a loss in image detail and are there color distortions in the fine detail? If so, the audio cables may be degrading the color information. The above website suggests that you are not likely to have a significant problem and with good reason: The color channel bandwidths are signficantly lower than the luminance component. The human visual system has much better spatial resolution with respect to luminance than to color. Of course, you might also consider a DIY cable set. Given your absolutely outstanding technical qualifications, this would be a trivial (but annoying) undertaking! :-) "Ethan Winer" ethanw at ethanwiner dot com wrote in message ... Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Thanks for any advice. --Ethan |
#34
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Component video really need 75 ohm cable?
"JWV Miller" wrote ...
Here is a website that seems to be a reasonably accurate answer to your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. Actually it will show you *exagerated* artificial sharpness because the color subcarrier will make edges look sharper than they would if you were looking at just the Y (monochrome) signal. Agree that "industrial" 75 ohm cables are quite sufficient. If you went to the studios that produced that video, do you think you would find them wired with "Monster" or other boutique cable? Not bloody likely. If you really want "the good stuff" use Belden 8281 precision video coax. (Except that is so darn stiff and requires special connectors.) |
#35
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Component video really need 75 ohm cable?
"JWV Miller" wrote ...
Here is a website that seems to be a reasonably accurate answer to your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. Actually it will show you *exagerated* artificial sharpness because the color subcarrier will make edges look sharper than they would if you were looking at just the Y (monochrome) signal. Agree that "industrial" 75 ohm cables are quite sufficient. If you went to the studios that produced that video, do you think you would find them wired with "Monster" or other boutique cable? Not bloody likely. If you really want "the good stuff" use Belden 8281 precision video coax. (Except that is so darn stiff and requires special connectors.) |
#36
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Component video really need 75 ohm cable?
"JWV Miller" wrote ...
Here is a website that seems to be a reasonably accurate answer to your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. Actually it will show you *exagerated* artificial sharpness because the color subcarrier will make edges look sharper than they would if you were looking at just the Y (monochrome) signal. Agree that "industrial" 75 ohm cables are quite sufficient. If you went to the studios that produced that video, do you think you would find them wired with "Monster" or other boutique cable? Not bloody likely. If you really want "the good stuff" use Belden 8281 precision video coax. (Except that is so darn stiff and requires special connectors.) |
#37
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Component video really need 75 ohm cable?
"JWV Miller" wrote ...
Here is a website that seems to be a reasonably accurate answer to your question: http://members.aol.com/ajaynejr/compon.htm One thing that you might do is to plug in just the yellow cable to the yellow jacks. The resulting image will be monochrome but will show the maximum bandwidth (sharpness) possible. Actually it will show you *exagerated* artificial sharpness because the color subcarrier will make edges look sharper than they would if you were looking at just the Y (monochrome) signal. Agree that "industrial" 75 ohm cables are quite sufficient. If you went to the studios that produced that video, do you think you would find them wired with "Monster" or other boutique cable? Not bloody likely. If you really want "the good stuff" use Belden 8281 precision video coax. (Except that is so darn stiff and requires special connectors.) |
#38
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Component video really need 75 ohm cable?
"Ethan Winer" ethanw at ethanwiner dot com writes:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Practically all analogue consumer video interfaces are designed top use 75 ohm coaxial cable. This is the right cable to use in all those applications and gives guaranteed performance. If you use something else, then the results you cet can vary from good performance to poor performance depending the cable used, cable length and sometimes even on equipment used. Usually with showr wires od few meters the "normal RCA cables" do not cuase problems on normal TV signals. But when cables get longer or you have higher resolution signal (progressive video from DVD, HDTV signal, computer VGA signal), problems are more easily seen. The cable you used most propably is designed to have two different types of cables it. RCA terminated video cable is generally 75ohms. The audio wires are general purpose shielded audio cable, that can have considerably different impedance than 75 ohms and has generally considerable higher attenuation than video coax cables (bnecause of different insulation material used). I have also seen video + audio cabls where all three wires are all the same general purpose audio cable type.. Depending on the distance from the video source to display device distance, you might or might not benefit from the better cables. If your cables have length of one meter or so, then changing cables most propably do not have any noticable effect. If your cables are 10 meters long, you most propably can see some difference. -- Tomi Engdahl (http://www.iki.fi/then/) Take a look at my electronics web links and documents at http://www.epanorama.net/ |
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Component video really need 75 ohm cable?
"Ethan Winer" ethanw at ethanwiner dot com writes:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Practically all analogue consumer video interfaces are designed top use 75 ohm coaxial cable. This is the right cable to use in all those applications and gives guaranteed performance. If you use something else, then the results you cet can vary from good performance to poor performance depending the cable used, cable length and sometimes even on equipment used. Usually with showr wires od few meters the "normal RCA cables" do not cuase problems on normal TV signals. But when cables get longer or you have higher resolution signal (progressive video from DVD, HDTV signal, computer VGA signal), problems are more easily seen. The cable you used most propably is designed to have two different types of cables it. RCA terminated video cable is generally 75ohms. The audio wires are general purpose shielded audio cable, that can have considerably different impedance than 75 ohms and has generally considerable higher attenuation than video coax cables (bnecause of different insulation material used). I have also seen video + audio cabls where all three wires are all the same general purpose audio cable type.. Depending on the distance from the video source to display device distance, you might or might not benefit from the better cables. If your cables have length of one meter or so, then changing cables most propably do not have any noticable effect. If your cables are 10 meters long, you most propably can see some difference. -- Tomi Engdahl (http://www.iki.fi/then/) Take a look at my electronics web links and documents at http://www.epanorama.net/ |
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Component video really need 75 ohm cable?
"Ethan Winer" ethanw at ethanwiner dot com writes:
Hi Folks, I just upgraded to a new "progressive" DVD player and of course the salesman tried to sell me a $50 component video cable to connect it. So for now I'm using a regular three-wire RCA cable meant for composite video and Left/Right audio, and it works, but I'm wondering if I really would benefit from better cables. Practically all analogue consumer video interfaces are designed top use 75 ohm coaxial cable. This is the right cable to use in all those applications and gives guaranteed performance. If you use something else, then the results you cet can vary from good performance to poor performance depending the cable used, cable length and sometimes even on equipment used. Usually with showr wires od few meters the "normal RCA cables" do not cuase problems on normal TV signals. But when cables get longer or you have higher resolution signal (progressive video from DVD, HDTV signal, computer VGA signal), problems are more easily seen. The cable you used most propably is designed to have two different types of cables it. RCA terminated video cable is generally 75ohms. The audio wires are general purpose shielded audio cable, that can have considerably different impedance than 75 ohms and has generally considerable higher attenuation than video coax cables (bnecause of different insulation material used). I have also seen video + audio cabls where all three wires are all the same general purpose audio cable type.. Depending on the distance from the video source to display device distance, you might or might not benefit from the better cables. If your cables have length of one meter or so, then changing cables most propably do not have any noticable effect. If your cables are 10 meters long, you most propably can see some difference. -- Tomi Engdahl (http://www.iki.fi/then/) Take a look at my electronics web links and documents at http://www.epanorama.net/ |
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