Groups > sci.electronics.repair > #86924

Re: World's Worst Soldering!

From	Cursitor Doom <curd@notformail.com>
Newsgroups	sci.electronics.repair, sci.electronics.design
Subject	Re: World's Worst Soldering!
Date	2018-10-07 20:06 +0000
Organization	A noiseless patient Spider
Message-ID	<ppdp0g$mrp$9@dont-email.me> (permalink)
References	<ppdb22$mrp$7@dont-email.me> <3ofkrd1vvsq2oanbnoh5ku6sljpr79rm5v@4ax.com>

Cross-posted to 2 groups.

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On Sun, 07 Oct 2018 10:36:05 -0700, Jeff Liebermann wrote:

> There may be hope for you yet:

Unfortunately not!

> 1.  How many watts is your soldering iron?  It looks like the mess made
> by too low power or too fine a tip.  75 watt seems about right.

I have 15W, 25W, 40W and 80W irons. This atrocity was carried out with 
the 15W one which has a pointed tip for some reason.

> 2.  Is the soldering iron temperature controlled?  If yes, raise the
> temperature and work fast.  Mine runs at 750F (400C) for 60/40 lead-tin.
>  If no, go shopping and buy a decent adjustable temperature controlled
> soldering station.  Get a fine tip for fine work, and a thicker tip for
> the big stuff (so that the tip doesn't go cold as soon as you touch the
> work).

You're very kind in attributing this train wreck of a repair to my having 
the wrong tools, Jeff. Sadly I don't believe it's the case. This kind of 
work requires a steady hand and a keen eye and I possess neither.

> 3.  Are those 3300uF 25V caps 85C caps or 105C?  The photo looks like
> 85C.  If so, they'll last about 6 months inside a hot oscilloscope.

I followed the original spec as far as possible. The originals were 
5500uF, 30VDC and 85C. I couldn't get the right capacitance within the 
space available so used 33's in parallel. The old 85C's lasted for 
decades so your 6 month assessment may be a bit pessimistic.

> 4.  Clean the enamel off the wires with sandpaper before you solder.
> Tin the wire ends before attaching to a lug or PCB rivet.

Yes, I did do that. I know what I *should* do but it doesn't help.

> Also, if you don't have a hot air SMD workstation, this might be a good
> time to get one because they often include an adjustable temperature
> controlled soldering iron.

Can you imagine the carnage I'd leave behind attempting SMD stuff?? :-D

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Thread

World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-07 16:08 +0000
  Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-07 09:35 -0700
    Re: World's Worst Soldering! Chris <cbx@noreply.com> - 2018-10-07 16:41 +0000
      Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-07 11:19 -0700
  Re: World's Worst Soldering! Jeff Liebermann <jeffl@cruzio.com> - 2018-10-07 10:36 -0700
    Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-07 11:22 -0700
    Re: World's Worst Soldering! John Robertson <spam@flippers.com> - 2018-10-07 11:58 -0700
      Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-07 12:57 -0700
      Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 13:26 -0700
        Re: World's Worst Soldering! <698839253X6D445TD@nospam.org> - 2018-10-07 20:36 +0000
          Re: World's Worst Soldering! "jfeng@my-deja.com" <jfeng@my-deja.com> - 2018-10-07 15:06 -0700
            Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-07 18:37 -0400
          Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 15:46 -0700
        Re: World's Worst Soldering! John Robertson <spam@flippers.com> - 2018-10-07 13:41 -0700
      Re: World's Worst Soldering! Jeff Liebermann <jeffl@cruzio.com> - 2018-10-07 19:09 -0700
    Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-07 20:06 +0000
      Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-07 13:34 -0700
        Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-07 18:33 -0400
      Re: World's Worst Soldering! Jeff Liebermann <jeffl@cruzio.com> - 2018-10-07 19:44 -0700
        Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-07 23:30 -0400
        Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-08 10:55 +0000
        Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-08 08:33 -0700
          Re: World's Worst Soldering! Jeff Liebermann <jeffl@cruzio.com> - 2018-10-08 11:44 -0700
            Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-08 17:17 -0400
            Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-09 05:57 -0700
      Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 21:26 -0700
        Re: World's Worst Soldering! bitrex <user@example.net> - 2018-10-08 02:20 -0400
        Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-08 10:57 +0000
    Re: World's Worst Soldering! bruce2bowser@gmail.com - 2018-10-13 04:47 -0700
      Re: World's Worst Soldering! Allodoxaphobia <knock_yourself_out@example.net> - 2018-10-13 13:09 +0000
        Re: World's Worst Soldering! bruce2bowser@gmail.com - 2018-10-13 09:23 -0700
  Re: World's Worst Soldering! Steff <e-post.nu@gmx.com> - 2018-10-07 19:56 +0200
  Re: World's Worst Soldering! <698839253X6D445TD@nospam.org> - 2018-10-07 18:58 +0000
    Re: World's Worst Soldering! DecadentLinuxUserNumeroUno@decadence.org - 2018-10-08 01:00 +0000
      Re: World's Worst Soldering! Phil Allison <pallison49@gmail.com> - 2018-10-07 20:02 -0700
        Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-07 23:39 -0400
      Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-07 23:36 -0400
  Re: World's Worst Soldering! bitrex <user@example.net> - 2018-10-07 21:36 -0400
    Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 19:34 -0700
      Re: World's Worst Soldering! bitrex <user@example.net> - 2018-10-07 22:58 -0400
        Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-07 20:59 -0700
      Re: World's Worst Soldering! John Robertson <spam@flippers.com> - 2018-10-07 22:53 -0700
        Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-08 01:08 -0700
          Re: World's Worst Soldering! John Robertson <spam@flippers.com> - 2018-10-08 08:26 -0700
            Re: World's Worst Soldering! bitrex <user@example.net> - 2018-10-08 11:45 -0400
            Re: World's Worst Soldering! Allodoxaphobia <knock_yourself_out@example.net> - 2018-10-08 17:13 +0000
              Re: World's Worst Soldering! John Robertson <spam@flippers.com> - 2018-10-08 11:00 -0700
      Re: World's Worst Soldering! <698839253X6D445TD@nospam.org> - 2018-10-08 07:42 +0000
      Re: World's Worst Soldering! tabbypurr@gmail.com - 2018-10-08 08:25 -0700
  Re: World's Worst Soldering! Jasen Betts <jasen@xnet.co.nz> - 2018-10-08 02:13 +0000
    Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-08 10:39 +0000
  Re: World's Worst Soldering! The Real Bev <bashley101@gmail.com> - 2018-10-07 22:33 -0700
    Re: World's Worst Soldering! John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-08 01:12 -0700
      Re: World's Worst Soldering! <698839253X6D445TD@nospam.org> - 2018-10-08 15:01 +0000
        Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-09 17:45 +0000
          Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-09 17:47 +0000
  Re: World's Worst Soldering! Look165 <look165@numericable.fr> - 2018-10-08 11:08 +0200
    Re: World's Worst Soldering! Cursitor Doom <curd@notformail.com> - 2018-10-08 10:49 +0000
      Re: World's Worst Soldering! Look165 <look165@numericable.fr> - 2018-10-08 13:05 +0200
  Re: World's Worst Soldering! "pfjw@aol.com" <peterwieck33@gmail.com> - 2018-10-08 04:12 -0700
    Re: World's Worst Soldering! Ralph Mowery <rmowery28146@earthlink.net> - 2018-10-08 11:25 -0400
      Re: World's Worst Soldering! "pfjw@aol.com" <peterwieck33@gmail.com> - 2018-10-08 09:26 -0700
        Re: World's Worst Soldering! "jfeng@my-deja.com" <jfeng@my-deja.com> - 2018-10-08 12:34 -0700
          Re: World's Worst Soldering! "pfjw@aol.com" <peterwieck33@gmail.com> - 2018-10-09 04:03 -0700
  Re: World's Worst Soldering! Stephen Wolstenholme <steve@easynn.com> - 2018-10-08 16:57 +0100
  Re: World's Worst Soldering! Tom Gardner <spamjunk@blueyonder.co.uk> - 2018-10-08 17:00 +0100
  Re: World's Worst Soldering! Kellerman <"kellerman(snot)2007"@gmail.com> - 2018-10-27 14:07 +0100
    Re: World's Worst Soldering! Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-27 12:36 -0400
      Re: World's Worst Soldering! Kellerman <"kellerman(snot)2007"@gmail.com> - 2018-11-01 10:46 +0000
        Re: World's Worst Soldering! Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-11-01 10:06 -0400
          Re: World's Worst Soldering! Kellerman <"kellerman(snot)2007"@gmail.com> - 2018-11-02 11:47 +0000

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