I only heard directionality on 3 out of many cables, 2 with el cheapo plastic semi transparent green and violet the other with a bit nicer black wire with magnetic gold tinted metal connectors. All were RCA to RCA obtained locally from electronic component shops and I noted directional difference on sibilance on Dolly Parton's "House of the Rising Sun" and Norah Jones' "Don't Know Why". No measurement attempted, I simply discarded the cables due to suspicion of defect. But it seems that Dan has access to more reliable sources of directional cables. Perhaps he can help you.
Chris,
The Avro Arrow was the most advanced fighter of it's time. The prototypes were actually built on a production line. The line was then modified as the prototypes changed. This was done to save time, definitively not money. as the USSR's Bison bomber was thought to be a major threat.
The engines targeted for it were not ever produced by others, again Canadian ones were designed for it. They used titanium for the second stage compressor fans. A great choice of metal except the source was the USSR. It also had the problem that they did not have good ways to work with the metal so that really raised the costs.
Then as this was implementing essentially what we call fly by wire systems for the first time, they had neither the experience or even the parts to do a superb job. However keep in mind the plane was designed before silicon transistors, so they did get it to work, but it was again quite expensive to build and was a bit of a reliability problem.
Then came the issue of the avionics, radar and fire control. A Canadian design attempt was abandoned as too costly and the RCA alternative designed in was never put into production. So another cost increase to refit to a much less capable Hughes system.
Now it would have been the first operational Mach 2+ aircraft had it gone into service. But for the mission on intercepting Bison bombers which were only slightly faster than a P51 piston aircraft, they were an expensive bit of overkill. Then the issue was the original over estimate of the number of Bison aircraft. The Soviets in displaying them in public would have them circle around many times to make it appear they had lots of them.
During the rush for the Avro Arrows design they thought there would be almost a thousand of them. The actual production of all models was less than one hundred.
Yes the Canadian military really wanted them, but the politicians though the money would be better spent on missile defense program.
The real death knell was of course no foreign sales. The US was not invented here unavailable, the Brits thought they had invented all this and could do better and no one else would be allowed access to all the secret sauce.
The Avro Arrow was the most advanced fighter of it's time. The prototypes were actually built on a production line. The line was then modified as the prototypes changed. This was done to save time, definitively not money. as the USSR's Bison bomber was thought to be a major threat.
The engines targeted for it were not ever produced by others, again Canadian ones were designed for it. They used titanium for the second stage compressor fans. A great choice of metal except the source was the USSR. It also had the problem that they did not have good ways to work with the metal so that really raised the costs.
Then as this was implementing essentially what we call fly by wire systems for the first time, they had neither the experience or even the parts to do a superb job. However keep in mind the plane was designed before silicon transistors, so they did get it to work, but it was again quite expensive to build and was a bit of a reliability problem.
Then came the issue of the avionics, radar and fire control. A Canadian design attempt was abandoned as too costly and the RCA alternative designed in was never put into production. So another cost increase to refit to a much less capable Hughes system.
Now it would have been the first operational Mach 2+ aircraft had it gone into service. But for the mission on intercepting Bison bombers which were only slightly faster than a P51 piston aircraft, they were an expensive bit of overkill. Then the issue was the original over estimate of the number of Bison aircraft. The Soviets in displaying them in public would have them circle around many times to make it appear they had lots of them.
During the rush for the Avro Arrows design they thought there would be almost a thousand of them. The actual production of all models was less than one hundred.
Yes the Canadian military really wanted them, but the politicians though the money would be better spent on missile defense program.
The real death knell was of course no foreign sales. The US was not invented here unavailable, the Brits thought they had invented all this and could do better and no one else would be allowed access to all the secret sauce.
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Thanks, and I'm curious about the recent findings.
I was perfectly serious in both my comments, the second is already proven. 😉.
Dan.
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You think you can claim victory with a cheap insult?
Proof is the one thing that is totally lacking with all your ideas.
If you put some acoustic resonators in a room you can change how the room sounds. In some cases the room may sound 'larger'. This is hardly the alien military technology usually employed by John's friends.
All this cable talk;
Is this for single ended or balanced?
Has anyone stated a balanced cable is directional?
Mike
Is this for single ended or balanced?
Has anyone stated a balanced cable is directional?
Mike
Bill Whitlock has shown how to make a balanced cable directional and the maths does show it works better one way. But that is due to capacitive coupling of the shield at one end.
Which is why I was asking.
I'm not a cable is directional believer but I can see connectors and shields doing something, maybe, we have seen these items already posted.
Even with my words above I've spent enough time in the studio with 50 foot mic cables carrying mV signals.... It's going to take a lot to convince me.
I'm not a cable is directional believer but I can see connectors and shields doing something, maybe, we have seen these items already posted.
Even with my words above I've spent enough time in the studio with 50 foot mic cables carrying mV signals.... It's going to take a lot to convince me.
The case I quoted was very specific and would only cause a difference if certain problems existed. It's like the case where if you need to use starquad and Neutrix EMC series connectors you know why you need them 🙂.
Not intended as any kind of insult, please don't take it that way.
The measured proofs will come soon enough, in the meantime I encounter and investigate for myself subjective findings that others also have spoken of in the past.
Others have given suggestions on how to discriminate this cable directional property, and when results are shown there will be a rational explanation of course.
I don't lose sleep over this, but I do consider it to be a strong variable/confounder in the case of some audio systems and requiring qualifying.
Dan.
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XLR cables aren't straightforward to use in arbitrary direction because of the gendered connectors. Unless you have gender-changing adapters people have little chance to test for potential XLR cable directionality, so not much info to be found.
I know of at least one semi-pro cable maker who states directivity for the raw cable material he uses for XLRs.
It is not beyond the bounds of possibility that some makers imply something they do not personally believe but think their customers believe it so it is good for marketing. They need not lie to do this; just say that they always maintain cable orientation.
Richard, Audioquest cables are marked for direction, and they are solid core which is the easiest to hear the direction of.
https://www.audioquest.com/theory-education/article/83-directionality-its-all-about-noise
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