Re: USB extension cables

From	Mark Lloyd <not.email@all.invalid>
Subject	Re: USB extension cables
Newsgroups	alt.comp.os.windows-10, alt.comp.os.windows-11, sci.electronics.repair
References	<ptmvuk5f1ahmdklavmhkp158hhef3iujfb@4ax.com> <n5b57mFbrsU1@mid.individual.net> <69f0f75d$2$26$882e4bbb@reader.netnews.com> <n5ciguF78d2U1@mid.individual.net>
Date	2026-04-29 17:34 +0000
Message-ID	<69f24133$0$25$882e4bbb@reader.netnews.com> (permalink)

Cross-posted to 3 groups.

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On Tue, 28 Apr 2026 21:10:06 +0100, Andy Burns wrote:

[snip]

>> If you know much about electricity, you know that watts/amps don't flow
>> unless there's some kind of load.
> 
> Sure, current is pulled rather than pushed, but the comms between source
> and sink device can set the supply to 48V which most devices won't be
> ready for.

Why would they set something they can't use? IIRC, 48V can't be set unless 
the cable has a working chip in it.

>> Also, the damaged chip is likely to be non-functional, and the power is
>> limited to 60W.
> 
> Latest USB PD3.1 spec caters for up to 240W

IIRC, 60W is the limit without a functioning chip in the cable. It doesn't 
matter if the source and/or load are capable of more. 

BTW, I haven't yet seen one of these devices, although C to C cables are 
often marked for 240W.

-- 
Mark Lloyd
http://notstupid.us/

"When I was a child there were many witches, and they bewitched both
cattle and men, especially children." [Martin Luther]

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Thread

USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-04-27 18:07 -0400
  Re: USB extension cables Hank Rogers <Hank@nospam.invalid> - 2026-04-27 17:30 -0500
  Re: USB extension cables Jeff Liebermann <jeffl@cruzio.com> - 2026-04-27 15:56 -0700
    Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-04-27 23:40 -0400
      Re: USB extension cables Frank Slootweg <this@ddress.is.invalid> - 2026-04-28 10:26 +0000
        Re: USB extension cables Andy Burns <usenet@andyburns.uk> - 2026-04-28 11:41 +0100
        Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-04-29 16:18 -0400
      Re: USB extension cables Paul <nospam@needed.invalid> - 2026-04-28 11:53 -0400
  Re: USB extension cables "Carlos E.R." <robin_listas@es.invalid> - 2026-04-28 03:08 +0200
  Re: USB extension cables Andy Burns <usenet@andyburns.uk> - 2026-04-28 08:17 +0100
    Re: USB extension cables Paul <nospam@needed.invalid> - 2026-04-28 12:41 -0400
    Re: USB extension cables Sam E <no.email@here.invalid> - 2026-04-28 18:07 +0000
      Re: USB extension cables Andy Burns <usenet@andyburns.uk> - 2026-04-28 21:10 +0100
        Re: USB extension cables Mark Lloyd <not.email@all.invalid> - 2026-04-29 17:34 +0000
      Re: USB extension cables Daniel70 <daniel47@nomail.afraid.org> - 2026-04-30 19:35 +1000
        Re: USB extension cables Mark Lloyd <not.email@all.invalid> - 2026-04-30 18:08 +0000
          Re: USB extension cables "Carlos E.R." <robin_listas@es.invalid> - 2026-05-01 13:41 +0200
            Re: USB extension cables Paul <nospam@needed.invalid> - 2026-05-01 12:38 -0400
              Re: USB extension cables Daniel70 <daniel47@nomail.afraid.org> - 2026-05-02 20:46 +1000
              Re: USB extension cables Mark Lloyd <not.email@all.invalid> - 2026-05-02 19:06 +0000
                Re: USB extension cables Paul <nospam@needed.invalid> - 2026-05-02 19:01 -0400
                Re: USB extension cables Nioclás Pól Caileán de Ghloucester <thanks-to@Taf.com> - 2026-05-07 19:39 +0000
              Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-05-10 02:08 -0400
                OT: electrical pioneers (was: Re: USB extension cables) "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-05-10 11:39 +0100
                Re: OT: electrical pioneers (was: Re: USB extension cables) Jeroen Belleman <jeroen@nospam.please> - 2026-05-10 21:18 +0200
                Re: OT: electrical pioneers (was: Re: USB extension cables) micky <NONONOmisc07@fmguy.com> - 2026-05-10 15:41 -0400
                Re: OT: electrical pioneers "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-05-11 13:16 +0100
          Re: USB extension cables Daniel70 <daniel47@nomail.afraid.org> - 2026-05-02 20:41 +1000
            Re: USB extension cables Paul <nospam@needed.invalid> - 2026-05-02 10:39 -0400
    Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-04-29 16:24 -0400
      Re: USB extension cables "Kerr-Mudd, John" <admin@127.0.0.1> - 2026-04-30 09:09 +0100
        Re: USB extension cables Daniel70 <daniel47@nomail.afraid.org> - 2026-04-30 19:39 +1000
          Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-04-30 10:28 -0400
            Re: USB extension cables Paul <nospam@needed.invalid> - 2026-04-30 12:00 -0400
      Re: USB extension cables legg <legg@nospam.magma.ca> - 2026-05-03 08:06 -0400
        Re: USB extension cables The Horny Goat <lcraver@home.ca> - 2026-05-08 10:14 -0700
          Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-05-09 20:05 -0400
            Re: USB extension cables Jeff Liebermann <jeffl@cruzio.com> - 2026-05-09 18:35 -0700
              Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-05-10 02:02 -0400
                Re: USB extension cables Jeff Liebermann <jeffl@cruzio.com> - 2026-05-10 08:47 -0700
                Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-05-10 15:38 -0400
                Re: USB extension cables Daniel70 <daniel47@nomail.afraid.org> - 2026-05-11 20:33 +1000
                Just OT (was: Re: USB extension cables) "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-05-11 13:10 +0100
      Re: USB extension cables Jeff Liebermann <jeffl@cruzio.com> - 2026-05-03 10:33 -0700
        Re: USB extension cables Mark Lloyd <not.email@all.invalid> - 2026-05-03 18:22 +0000
        Re: USB extension cables "J. P. Gilliver" <G6JPG@255soft.uk> - 2026-05-03 19:47 +0100
        Re: USB extension cables micky <NONONOmisc07@fmguy.com> - 2026-05-09 20:07 -0400

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