YES- 75 ohm BNC and RCA connectors most certainly DO exist: Refer to the site URL that I posted previouly in this thread.
Digital cable optimal length?
Last time I asked about optimal phono cable length, i got mostly answers like 1.5 m or less. I had experimented since then using 6 ft long RCA/RCA as phono cable and compared with same make 1.5 RCA/RCA cable as phono for along time with all my three TT set ups and result was same.
it does DETERIORATE the sound quality drastically as the cable gets longer (i had tried 4ft long also)
Now the question about digital cable.
Would having 3 m long BALANCED /BALANCED digital cable have similar results?
Have you tried?
Thanks,
it does DETERIORATE the sound quality drastically as the cable gets longer (i had tried 4ft long also)
Now the question about digital cable.
Would having 3 m long BALANCED /BALANCED digital cable have similar results?
Have you tried?
Thanks,
- ...
- 23 posts total
Rodman, I have to admit to a little skepticism about that Canare RCA connector. In the page you link to, a special joining method is cited as part of the 75-ohm connection. The RCA plug itself is not claimed to be a 75-ohm device. Elsewhere I believe I have seen a Canare RCA plug which the company identified as "true 75-ohm", but this claim is in conflict with statements from other sources concerning the impedance inherent to the RCA design. I certainly would like there to be a 75-ohm RCA plug and would be happy to be shown one whose impedance figure could be trusted beyond the shadow of a doubt. |
Tobias- Read the Jan 2,1997 entry in it's entirety: (http://www.soundstage.com/feedback/resp01.htm) You would think that the people marketing, or the thousands that have purchased Canare 75ohm RCAs over the years, would have noticed if they did not deliver a true 75 ohms by now. (http://www.markertek.com/SearchProduct.asp?item=RCAP%2DC3A&off=6&sort=prod&skuonly=0&search=rca&pagesize=20) "Beyond a shadow of a doubt"? Buy a pair(they'll cost you under $10), attach them to some 75 ohm cable, and use an ohmeter on the assembly. I'm certain thousands of others have tested the RP-C4 RCAs, and LV-61S cables, to remove their doubts too. (http://www.avbestbuy.com/webpage/sayaboutcanare.htm) It seems some companies are buying Canare products, disguising/relabeling them, and selling them as their own(interesting)! =8^) |
The link Rodman provided to Markertek's catalog entry for the Canare connector is fairly persuasive, I think ("200MHz performance/vswr less than 1.1"), assuming it is factual. Also, note that the connector is designed to be crimped, which perhaps answers Dazzdax's question. I should point out, though, that an ohmmeter will be of no help in determining the impedance of a connector (or a cable, for that matter). It will indicate an open circuit (infinity ohms), because impedance and vswr (reflection) effects only come into play at high frequencies. Specialized test equipment that feeds a high (e.g., rf) frequency signal into the device under test would be required to make a meaningful measurement. Regards, -- Al |
How come NONE of you have referred to this article which seems to give some reasons for using 1.5m length for digital cables??? http://www.positive-feedback.com/Issue14/spdif.htm |
- 23 posts total