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Re: [OT] 3.5mm stereo to mono adapter with switch?

From "Carlos E.R." <robin_listas@invalid.es>
Newsgroups uk.d-i-y, comp.mobile.android, uk.telecom.mobile
Subject Re: [OT] 3.5mm stereo to mono adapter with switch?
Date 2016-11-20 14:22 +0100
Organization Aioe.org NNTP Server
Message-ID <4mk8gd-qa2.ln1@Telcontar.valinor> (permalink)
References <XnsA6C57F251CCBCD4AM2@81.171.92.183> <o0ph8g$imn$1@dont-email.me> <1mwyrnv.139vvo0lki9kuN%roger@hayter.org>

Cross-posted to 3 groups.

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On 2016-11-19 14:54, Roger Hayter wrote:
> Harry Bloomfield <harry.m1byt@NOSPAM.tiscali.co.uk> wrote:


>> DIY? Buy a short 3.5mm stereo extension lead (I bought a 12" long one
>> last week), cut into it to extricate the wires for both channels, then
>> add a small switch to short the two channels together. Cover switch and
>> cables after testing, with some Milliput.
> 
> It may well be commonly done, but it is not a good idea to short the
> stereo channels together.  Probably the amplifier is protected against
> electrical damage but as far as the difference signal is concerned the
> behaviour is probably not defined.  Either use just one channel or
> connect the two stereo channels through two resistors high enough to
> maintain linearity but low enough not to use all the power.  The value
> obviously depends what the load is and what load the amplifier is
> intended for.  

But the amplifier is not designed for that different output impedance,
so it is, at least, working out of specs. Probably distorting as well.
Maybe not. It has to be calculated or tested for each case.


-- 
Cheers, Carlos.

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[OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 12:29 +0000
  Re: [OT] 3.5mm stereo to mono adapter with switch? Andy Burns <usenet@andyburns.uk> - 2016-11-19 12:35 +0000
    Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 12:48 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? Andy Burns <usenet@andyburns.uk> - 2016-11-19 13:05 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 13:13 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? Andy Burns <usenet@andyburns.uk> - 2016-11-19 13:34 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-19 13:40 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? tabbypurr@gmail.com - 2016-11-19 07:47 -0800
          Re: [OT] 3.5mm stereo to mono adapter with switch? The Natural Philosopher <tnp@invalid.invalid> - 2016-11-19 16:33 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-19 19:43 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-19 14:55 +0100
        Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-19 14:11 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-19 14:43 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-19 15:07 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 15:23 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-20 14:27 +0100
          Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 13:59 -0500
            Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-20 20:01 +0000
              Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 15:43 -0500
          Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 14:22 -0500
            Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-21 01:47 +0000
              Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-21 19:26 -0500
              Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-21 19:39 -0500
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-22 04:23 +0100
                Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-22 01:51 -0500
                Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-22 11:22 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-21 15:03 +0100
              Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-21 14:50 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? John #9 <john#9@Invalid.invalid> - 2016-11-19 15:30 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? John #9 <john#9@Invalid.invalid> - 2016-11-19 15:37 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-11-19 17:48 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? Terry Casey <k.type@example.invalid> - 2016-11-19 18:08 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 19:01 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 14:27 -0500
          Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-20 14:19 +0100
        Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 18:56 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-20 04:10 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? The Natural Philosopher <tnp@invalid.invalid> - 2016-11-20 05:19 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-20 11:27 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-20 12:16 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-20 12:27 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-22 02:25 +0000
              Re: [OT] 3.5mm stereo to mono adapter with switch? tabbypurr@gmail.com - 2016-11-21 18:45 -0800
                Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-23 03:43 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? The Natural Philosopher <tnp@invalid.invalid> - 2016-11-23 06:15 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? tabbypurr@gmail.com - 2016-11-23 01:58 -0800
                Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-23 13:03 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-23 14:37 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-23 15:57 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-23 16:45 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-23 21:04 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-24 00:28 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-24 01:36 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? The Natural Philosopher <tnp@invalid.invalid> - 2016-11-24 08:58 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-24 13:54 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-24 01:57 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-24 14:42 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-24 15:36 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-24 05:58 +1100
          Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-20 14:20 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 13:50 -0500
      Re: [OT] 3.5mm stereo to mono adapter with switch? Martin Brown <|||newspam|||@nezumi.demon.co.uk> - 2016-11-23 08:35 +0000
  Re: [OT] 3.5mm stereo to mono adapter with switch? Harry Bloomfield <harry.m1byt@NOSPAM.tiscali.co.uk> - 2016-11-19 12:41 +0000
    Re: [OT] 3.5mm stereo to mono adapter with switch? tabbypurr@gmail.com - 2016-11-19 04:45 -0800
    Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 13:07 +0000
    Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-19 13:54 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 15:17 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-19 15:56 +0000
          Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-20 10:49 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-20 11:30 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? lew <citrustwosac@google.mailer.company.invalid> - 2016-11-20 02:48 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 14:32 -0500
          Re: [OT] 3.5mm stereo to mono adapter with switch? The Natural Philosopher <tnp@invalid.invalid> - 2016-11-20 22:08 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-20 14:22 +0100
  Re: [OT] 3.5mm stereo to mono adapter with switch? Neil <neil@myplaceofwork.com> - 2016-11-19 08:45 -0500
    Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-19 15:14 +0000
      Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-20 06:13 +1100
        Re: [OT] 3.5mm stereo to mono adapter with switch? Neil <neil@myplaceofwork.com> - 2016-11-19 14:36 -0500
          Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-20 08:19 +1100
            Re: [OT] 3.5mm stereo to mono adapter with switch? Neil <neil@myplaceofwork.com> - 2016-11-19 17:47 -0500
              Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-20 09:53 +1100
          Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-20 14:40 -0500
            Re: [OT] 3.5mm stereo to mono adapter with switch? Neil <neil@myplaceofwork.com> - 2016-11-20 14:53 -0500
            Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-21 07:40 +1100
            Re: [OT] 3.5mm stereo to mono adapter with switch? roger@hayter.org (Roger Hayter) - 2016-11-21 01:17 +0000
  Re: [OT] 3.5mm stereo to mono adapter with switch? "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-11-19 17:45 +0000
    Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-20 14:27 +0100
      Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-20 18:09 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? "Dave Plowman (News)" <dave@davenoise.co.uk> - 2016-11-20 18:43 +0000
        Re: [OT] 3.5mm stereo to mono adapter with switch? "Rod Speed" <rod.speed.aaa@gmail.com> - 2016-11-21 07:18 +1100
        Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-21 21:36 +0100
          Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-22 15:57 +0000
            Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-22 19:16 +0100
              Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-23 03:02 -0500
                Re: [OT] 3.5mm stereo to mono adapter with switch? "Carlos E.R." <robin_listas@invalid.es> - 2016-11-23 14:46 +0100
                Re: [OT] 3.5mm stereo to mono adapter with switch? micky <NONONOmisc07@bigfoot.com> - 2016-11-24 18:54 -0500
            Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-23 03:49 +0000
              Re: [OT] 3.5mm stereo to mono adapter with switch? pamela <invalid@nospam.com> - 2016-11-23 12:38 +0000
                Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-24 02:44 +0000
    Re: [OT] 3.5mm stereo to mono adapter with switch? Johnny B Good <johnny-b-good@invalid.ntlworld.com> - 2016-11-22 02:38 +0000

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