To reinforce the point, at the factory there turn out to be so many sources of RFI that meaningful measurements of emissions from our products are impossible. Apparently the electric motor in the security shutter on the demo room door is one of the worst offenders.
The engineers have identified a field some way away, far away from mobile phone masts etc, where the RFI noise floor is sufficiently low, and ship the measurement instruments there in a car.
Hi Gregg
I was just pointing out what I use, and as said not a given, etc. My other post was aimed more at the, let’s call it bickering that was going on, rather than joining the conversation.
But my take on anything like this, and well everything really. Is try for yourself, and see what happens. As everything is just a guide in life, and you find your own way.
I think bickering is a good description! I’d already decided it must have gone well past tedious for others so would let it lie.
All the best.
I get my stuff measured in a proper chamber where it is turned through 360 at 1 minute/10 degree intervals. For the reasons you mention, before they measure my devices, they calibrate the empty chamber at the start of every single day: an “unproductive” 36 minutes but important if you have CE compliance at stake. Once they had some unusual activity and found out that a recently installed microwave oven in the adjacent kitchen was the culprit!
Yes, we do too Nigel, for actual CE compliance measurements. For development work though we use the field. Luckily for us parts of Cambridgeshire are quite rural!
I purchased some other cables from BJC (actually their ‘Iconoclast’ line) via their site a year or two ago and the duty and VAT were added at checkout in that case. Delivery was straightforward and there was nothing further to pay. I have also, in the last several months, bought a watch from a shop in Japan that does internet sales. In that case Fedex delivered the item, but it was followed a few days later by an emailed invoice (from Fedex) for the VAT and a disbursement fee.
In their different ways both were fairly smooth purchases.
Hi Simon
The cable should with me in a day or two. Last update was that it had arrived at Stansted Airport.
There is a comment from BJC, that import duties will be taken care of if purchased via their UK site.
“Although Blue Jeans Cable is located in Seattle, Washington, USA, this site is designed to make purchasing in the UK as seamless as if we were a UK supplier. We are VAT-registered in the UK; our prices on this site are VAT-inclusive; and we use fast shipping methods to make sure things will get to you promptly. Additionally, we have set things up with our shipping companies to ensure that when you order from this site for UK delivery, you will not owe any customs duty or VAT upon delivery, regardless of the size of the order”.
This is very reassuring for UK customers, isn’t it. Concise and clear, and just what we would want to hear if considering placing an order.
I bought their Belden 1800F XLR’s (for my ATC SCM40A’s) from the US a few years ago and all was seamless and great value, though I obviously took the import duties hit at the time.
A cable shield is basically a Faraday cage which needs to be completely enclosed and fully grounded on both ends. In a shielded cable with only one-end grounded, the ungrounded end is a high-impedance/maximum voltage-differential point, which causes the shield to capacitively couple any noise directly onto the twisted-pair Ethernet signal carrying wires. The shield stops being a faraday cage and instead becomes a monopole antenna.
I highly recommend you get a good book on the subject, such as → this.
Alternatively, pick your favourite AI Chatbot or even a Google search (which activates Gemini) with the following prompt;
Explain why HF shielding is degraded when a shielded Ethernet cable is grounded at one end only.
Don’t get me wrong, I have absolutely no problem with anyone experientially liking such cables (even if it’s usually caused by expectation bias). It’s when someone tries to justify/explain it with mistaken science that I feel the need to jump in 
You are still wrong, Anup, and still patronisingly so, but let’s leave it there as requested by others.
Enjoy your music.
I was looking at their XLRs, were you pleased with their performance? (Not wanting to go off topic with my own post😀)
Thank you for the list.
Nigel - you might want to do what @Anupc said and run it through ChatGPT or any other AI agent.
I just did - it is exactly as Anup wrote. I highly encourage anyone else who is interested to do the same.
Without posting the entire ChatGPT reply, this one part told me all I needed to know:
An ungrounded end makes the shield:
a quarter-wave stub at certain frequencies,
or a simple long wire antenna.
It now receives and radiates RF energy instead of blocking it.
The shield becomes a coupler rather than a protector.
Best
Gregg
One thing I should have made clearer. If my memory of my RF course module serves correctly the power of RFI decreases proportionate to the cube of the distance from source to sink, whereas conducted ground plane noise is passed essentially unattenuated. Hopefully my colleagues @James will jump in if I have this bass ackwards.
@glevethan This is not how it works in the real world, you’re both ignoring where the noise supposedly pickup by this supposed antenna goes and how it thus affects the oneards signal path.
If you have tried such a cable in your own system and have listening experiences to share then I would be as interested as anyone else here in hearing of them.
I really don’t need people pointing me to internet sources which are only partially relevant to what we are discussing here: I know this stuff!
Yes! I tried them vs what at the time was almost the default, the Starquad stuff. The difference was subtle rather than profound but I really like it and they’ve stayed ever since.
Hi Guys,
(I deleted my original posting of this as I did it as a reply to one of the postings and it isn’t a reply to any one posting in particular and didn’t want it to be seen that way…)
I’m all for spirited discussion but it’s been flagged that this thread is getting a bit heated again - do I need to dig out the marshmallows and light the campfire…?
P
Fortunately you don’t have to Phil, since the facts are all well laid out for everyone to read 
It’s an interesting topic for sure, and great for a lay person as we don’t have to come up with solutions!
Taking Anupc’s book suggestion I did find a downloadable copy of the 2007 edition:
I had to do this as my wife baulked at the idea that the full price new edition on Amazon in any way constituted a Xmas gift.
On the topic of commercial offerings GY8 review of the Tokyo Audio show points to a new founding device from Increcable, their write up on the issues are probably too simplistic for experts here, but helped me…
Hi,
Be aware that grounding is a very careful consideration when a piece of audio kit is designed and developed … it isn’t something that is just left to chance.