Source of 4 core screened PTFE cable - Page 1
Forum section: electronics / general

author: perdrix
author_rank: Frequent Contributor
timestamp: January 31, 2018, 07:30:44 am
content: I found Lapp Ölflex 0091331 which is a four core 0.75mm2screened PTFE cable which looks ideal for test leads, but RS in UK only sell it in 50 mtr drums at GBP650.41 (£13 per meter).Does anyone know of something reasonably close to equivalent that's a) available in shorter lengths (preferably in the UK), and b) isn't quite so eye wateringly costly?ThanksDave

author: fcb
author_rank: Super Contributor
timestamp: January 31, 2018, 08:20:29 am
content: Talk to Lapp directly in the UK. In my experience the cable is substantially marked up by RS!

author: voltsandjolts
author_rank: Unknown
timestamp: January 31, 2018, 08:34:57 am
content: Screened 4 core with a lower temperature rating (non-PTFE) is much cheaper but maybe you need high temp?

author: tggzzz
author_rank: Super Contributor
timestamp: January 31, 2018, 09:26:36 am
content: Minimum bend diameter 50mm; you may find it is stiffer than you expect.I have some of thishttps://www.ebay.co.uk/itm/Belden-89182-22-1P-150-Ohm-Twinaxial-Plenum-Teflon-Duofoil-Shielded-Cable-50ft/162587832647going spare, but be warned it is stiff.

author: quarks
author_rank: Frequent Contributor
timestamp: January 31, 2018, 10:33:24 am
content: Just in case you are not aware of it, this ÖLFLEX HEAT 260 cable has nickel-plated copper.For my own metrology grade leads I much prefer silver- over nickel-plating.

author: razvan784
author_rank: Regular Contributor
timestamp: January 31, 2018, 07:54:15 pm
content: If it helps, TME has 15m of 0091307 in stock (PTFE, unshielded):https://www.tme.eu/en/details/heat260mc-4x0.75/heat-resistant-cables/lapp-kabel/0091307/They will also sell you the 0091331 in 5m pieces, supposedly with a 3 week lead time:https://www.tme.eu/en/details/heat260cmc-4g0.75/heat-resistant-cables/lapp-kabel/0091331/

author: MK
author_rank: Regular Contributor
timestamp: January 31, 2018, 07:54:54 pm
content: One of the Volt Nut mails from some years ago said that NPL were using a starquad cable made in the uk for their in house leads.

author: ap
author_rank: Frequent Contributor
timestamp: February 01, 2018, 08:26:54 am
content: For those interested, I do offer a 4-wire, silver plated, PTFE cable, see my webpage.

author: thermistor-guy
author_rank: Frequent Contributor
timestamp: February 02, 2018, 12:44:08 am
content: Quote from: Flinstone on February 01, 2018, 05:03:50 amTeflon cable is great, with one caveat. It has a "knee" in the propagation delay versus temperature curve, at around 20 deg. C. The change in teflon's structure at this temperature causes some hysteresis in the delay characteristic. This is something to keep in mind if you use coax. cables in setups involving critical delay or impedance/reflectance measurements.http://przyrbwn.icm.edu.pl/APP/PDF/119/a119z4p17.pdfhttp://www.microwavejournal.com/articles/8360-phasetrack-ii-thermally-stable-coaxial-cables

author: dl1640
author_rank: Regular Contributor
timestamp: February 02, 2018, 12:50:10 am
content: Quote from: MK on January 31, 2018, 07:54:54 pmhttps://www.belden.com/blog/broadcast/How-Starquad-Works

author: thermistor-guy
author_rank: Frequent Contributor
timestamp: February 02, 2018, 02:18:19 am
content: Quote from: dl1640 on February 02, 2018, 12:50:10 amThis is getting away from the OP's topic, but Cat5 LAN cable outperforms star-quad here:https://www.prosoundtraining.com/2010/03/15/the-emi-project-part-2-point-source-field/

author: LaserEng
author_rank: Regular Contributor
timestamp: November 12, 2018, 11:38:43 am
content: Quote from: ap on February 01, 2018, 08:26:54 amCan you let me know what the voltage rating of the cable is? I know that is I connected the cable with uninsulated spades that the cable should be used with SELV voltages but was wondering how much voltage the actual cable can handle, also would be good to know it's rated current? Thanks.

author: CJay
author_rank: Super Contributor
timestamp: November 12, 2018, 11:55:53 am
content: Quote from: perdrix on January 31, 2018, 07:30:44 amWe tried and tried to find suitable PTFE high temperature cable for an automotive diagnostics application and ended up having it made for us, it was PTFE tape wrapped and cost us around £3 a metre but we had to buy a lot of metres worth (5000 ISTR) so if you need a lot it might be worth opening a conversation with a custom cable company?

author: doktor pyta
author_rank: Frequent Contributor
timestamp: November 12, 2018, 02:16:28 pm
content: I can recommend wire bought from ebay user empiredon:https://www.ebay.com/sch/empiredon/m.html?_nkw=&_armrs=1&_ipg=&_from=

author: TERRA Operative
author_rank: Super Contributor
timestamp: November 12, 2018, 03:58:50 pm
content: Quote from: CJay on November 12, 2018, 11:55:53 amWhat automotive application needs crotical cabling parameters?I'm interested to know, as I can't think of anything that can't be handled by the usual PVC coated wire.

author: Kosmic
author_rank: Super Contributor
timestamp: November 12, 2018, 05:02:11 pm
content: I bought my cables from this seller on ebayhttps://www.ebay.ca/usr/ayumitubesLook like he just have NOS so his stock is running out.Edited:I just double-checked and he doesn’t have shielded 4 cores anymore.

author: coppercone2
author_rank: Super Contributor
timestamp: November 12, 2018, 05:18:38 pm
content: Ptfe is when you god something worked out and you need hardcore generally awesome internal wiring or maybe for a electrometer. Avoid using it as test leads at all costs. Silicone.

author: CJay
author_rank: Super Contributor
timestamp: November 13, 2018, 06:13:51 am
content: Quote from: TERRA Operative on November 12, 2018, 03:58:50 pmIt wasn't an automotive application, that'd be fine with high temp or even normal spec PVC, it was an automotive diagnostics application, specifically an insertion probe that measured engine oil temperature which is outside the temperature range of 'usual' PVC which only does 70C, high temperature PVC is not up to the job either, it's usually only good to 130C* and degrades fairly quickly when exposed to the mixture of hot hydrocarbons in an engine sump.Non contact methods were not acceptable, by regulation and/or client specification.PTFE was ideal, oil resistant, 130C is just a mild spring day for it, it's slippery so it doesn't snag, it doesn't degrade and leave lumps of material in the engine to clog the oilways (unless some muppet managed to get it wrapped round the crankshaft) and when all things were considered, it really wasn't expensive compared to the other options which were either fatter, too stiff or not stiff enough and were working at the extremes of their specification anyway.*130C is getting to the extreme upper end of 'normal' engine oil temperatures for road vehicles but some of our clients were running engines in ways where extremes could be more the norm.