The most important measurement by far, is the shield end-to-end resistance.
The best cables have 0.008 Ohms per meter or less.
(It takes a good 4 terminal Ohm-meter to measure that low)
The best cables have 0.008 Ohms per meter or less.
(It takes a good 4 terminal Ohm-meter to measure that low)
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or pass a known current along the screen and measure the end to end voltage drop.
0r008 passing 1.000A will show 8.0mV
Two significant figures is better than 0.008ohms which is only one significant figure if the dedicated milli-ohm meter is that accurate.
Is the shield connected to the ground at some point or is it just floating?
Some manufacturers use the floating shield adequately spaced from signal conductors.
That is worth further experimenting.
Once upon a time there was a thread here which has been deleted in the meantime.
That implementation of dielectric biasing was very, very successful.
A true shield is an extension of the enclosure. An example of this would be the shield around a twisted pair. The shield is connected to the enclosure at both ends.
Which are you referring to?
The dielectric between the signal cores, or the dielectric between signal and shield?
Chord Chameleon VEE 3 stereo RCA interconnect The Chord Company
"...fully floating high frequency effective, high density braid and foil shielding..."
I owned that cable (older version) and checked that fact. It was true. Shield was not connected to anything.
http://www.audioquest.com/wp-content/uploads/2011/12/DBS.pdf
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Perhaps successful in a marketing sense. I tested them and found that the performance claims were complete nonsense.
I am not arguing with you Andrew, I am just sharing an information that someone could maybe comment or explain in order to encourage the further experimenting (diying).
I had several Van Den Hul Cables (D102, D300, First, First Ultimate).
For D102 and D300 (terminated by Serbian authorized seller) shield was for some reason connected to one end.
VDH also advocates this for the RCA connection of some models in its technical paper.
http://www.vandenhul.com/download/CAwdEAwUUkNEW0I=
2 has unusually high capacitance - don't use long lengths with a high source impedanceeuro21 said:
4 and 5 have rather high resistance - not high enough to do any damage, but perhaps a sign of peculiar construction?
1 and 3 are what cables should look like
Now let me guess: the electrically inferior cables are the most expensive?
If you say so.
I won't argue with moderator
Just a note: You can argue with SY as much as you like. He posts as a normal user and should be treated as such. All mods have to 'power up' to go into mod mode. You will see a cop hat when he does that.
Mods do not moderate threads they are active in from what I undestand. So SY is without any special powers.
Hehehe....
Mogami Neglex 2534 was the most used instrumental cable in analogue studios...do you know 600R symmetrical...
1.) Belden 1964A is true 75R cable with 75R connectors. I use it as SPDIF cable. As interconnect it has mediocre presentation.
3.) This is my "second line" interconnect (used for about ten years). Better than most of boutique interconnects, but not as refined as silver ones.
Its has about 3-3.5 feet 28 AWG spiralled silver conductor in both (hot and cold) sides.
The shielded one is my interconnect between MC transformer and phono. The shield (99% covered copper) is "floating" type, only MM phono side grounded.
The unshielded is my usually used interconnect between my tube preamp and tube amplifier.
No, the Mogami is one of the cheapest. 🙂
If I remember correctly, the average lenght of this cable was few ten meters in the studios.
I have no idea what this means. I assume you do not mean it gives boring speeches?euro21 said:
I have no idea what this means. I assume you were not referring to metal ore refining?
A few tens of metres of high capacitance cable could affect treble in a domestic system. Hopefully in a studio the sources are well-engineered and can cope? Of course, originally '600 ohm line' really was 600 ohm as the telephone people added the necessary inductors to define impedance and reduce dispersion. I guess in most studios it is not, so cable which is nothing like a real 600 ohm line can be used.
I think low capacitance cables are better, also shorter better. Please could you elaborate?