[time-nuts] I love the smell of tantalum in the morning

Tom Van Baak tvb at LeapSecond.com
Sat Nov 5 16:20:48 EDT 2016

Ok, thanks, Chris! Some day I'll learn SMT but I don't think it's wise for me to use a 5071 main board as my first mistake. So I'll follow-up with your generous offer off-list.


  ----- Original Message ----- 
  From: Chris Waldrup 
  To: Tom Van Baak ; Discussion of precise time and frequency measurement 
  Sent: Saturday, November 05, 2016 12:58 PM
  Subject: Re: [time-nuts] I love the smell of tantalum in the morning

  Hi Tom,

  I'm a SMT rework technician for a large satcom and defense company. 
  I have a shop at home too and all the equipment to repair this if I can be provided with the replacement cap. 
  Please let me know if I can be of help. 


  On Nov 5, 2016, at 14:12, Tom Van Baak <tvb at LeapSecond.com> wrote:

    See C13 in the attached photo. I need to replace some blown caps on a few boards [1]. In one instance the cap got so hot it melted itself off the board. Quiet convenient, actually -- it acts like its own fuse -- but I don't think the 5071 designers had that clever feature in mind.

    Having not done SMT before, how should I do it with minimal risk to the very precious PCB. Or, what equipment should I use this as a good excuse to buy?


    [0] http://www.imdb.com/title/tt0078788/quotes
    [1] http://leapsecond.com/museum/hp5071a/A1-mother.htm

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