Groups > sci.electronics.design > #519148

Re: guard ring?

From	"Tim Williams" <tiwill@seventransistorlabs.com>
Newsgroups	sci.electronics.design
Subject	Re: guard ring?
Date	2018-10-13 04:51 -0500
Organization	A noiseless patient Spider
Message-ID	<ppsf6u$970$1@dont-email.me> (permalink)
References	(1 earlier) <ppr5sh$3mq$1@dont-email.me> <b782sdhv8gtok4b8br9pjpik68m6rf15qt@4ax.com> <ppre16$cpu$1@dont-email.me> <pprker$6d5$1@dont-email.me> <ppscr9$145q$1@gioia.aioe.org>

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<DecadentLinuxUserNumeroUno@decadence.org> wrote in message 
news:ppscr9$145q$1@gioia.aioe.org...
> "Tim Williams" <tiwill@seventransistorlabs.com> wrote in
> news:pprker$6d5$1@dont-email.me:
>
>> Hot air machines are super cheap, and don't melt anything but what
>> they're pointed at.  Assuming the only thing melting is solder.
>
> With PCBs that have heavy via and high via counts near heavy parts even a
> single hot air jet can be detrimental to a board.

Well, you set it too high then (somewhere north of 260C).

And yeah, if you have too much thermal mass for this to work, you need a 
preheater.

Tim

-- 
Seven Transistor Labs, LLC
Electrical Engineering Consultation and Design
Website: https://www.seventransistorlabs.com/

Thread

guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-12 14:01 -0700
  Re: guard ring? TTman <kraken.sankey@gmail.com> - 2018-10-12 23:06 +0100
    Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-12 15:38 -0700
      Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-12 19:26 -0500
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-12 21:16 -0500
          Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 09:11 +0000
            Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-13 04:51 -0500
              Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 09:58 +0000
      Re: guard ring? George Herold <gherold@teachspin.com> - 2018-10-12 18:12 -0700
    Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-13 00:02 +0000
  Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-13 06:59 +0000
  Re: guard ring? Robert Baer <robertbaer@localnet.com> - 2018-10-13 22:45 -0700
    Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-14 09:44 -0700
      Re: guard ring? John S <Sophi.2@invalid.org> - 2018-10-14 12:45 -0500
        Re: guard ring? krw@notreal.com - 2018-10-14 14:28 -0400
      Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-14 19:28 +0000
        Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-14 20:57 +0000
          Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-15 05:20 +0000
            Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-15 10:59 +0000
      Re: guard ring? "nuny@bid.nes" <alien8752@gmail.com> - 2018-10-14 17:39 -0700
  Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-14 14:56 -0700
    Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-15 07:23 +0000
    Re: guard ring? <698839253X6D445TD@nospam.org> - 2018-10-15 07:54 +0000
      Re: guard ring? DecadentLinuxUserNumeroUno@decadence.org - 2018-10-15 11:21 +0000
        Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-15 07:52 -0700
  Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-16 10:31 -0700
    Re: guard ring? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-16 14:23 -0400
    Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-16 17:09 -0500
      Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-16 16:02 -0700
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-17 03:57 -0500
          Re: guard ring? John Larkin <jjlarkin@highlandtechnology.com> - 2018-10-17 04:52 -0700
      Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 11:00 -0700
        Re: guard ring? Steve Wilson <9fe142ac@gmail.com> - 2018-10-17 12:13 -0700
        Re: guard ring? Steve Wilson <9fe142ac@gmail.com> - 2018-10-17 12:19 -0700
          Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 12:39 -0700
        Re: guard ring? Jasen Betts <jasen@xnet.co.nz> - 2018-10-17 19:15 +0000
        Re: guard ring? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2018-10-17 15:33 -0400
          Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 12:56 -0700
            Re: guard ring? John Larkin <jjlarkin@highland_snip_technology.com> - 2018-10-17 13:15 -0700
        Re: guard ring? "Tim Williams" <tiwill@seventransistorlabs.com> - 2018-10-17 16:34 -0500

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