so i don'tt kno what is better coald heat or rizestance can some one advise 
pleas i need to position the work and the solder then put the end on the work 
and feal that it is on the solder then aply the heat i don't want to be aplying 
heat whair it is'nt wanted 
  ----- Original Message ----- 
  From: Don 
  To: [email protected] 
  Sent: Tuesday, December 12, 2006 9:01 PM
  Subject: Re: [BlindHandyMan] soaldering


  Great post, Tom, some really good information in your post.. Don
  ----- Original Message ----- 
  From: Tom Fowle 
  To: [email protected] 
  Sent: Tuesday, December 12, 2006 12:51 PM
  Subject: Re: [BlindHandyMan] soaldering

  Lenny,
  the "cold heat" soldering device is what might be called a resistance 
soldering
  device.

  The tip is two carbon pointed thingies with a small gap between them.
  You put them against the joint so as to get a good contact and the current
  from a batch of AA cells flows through work and it gets hot.

  It is quite difficult to get a good connection.
  there is an LED on the thing which is supposed to tell you
  when you've got a good connection but reading this with a light probe
  would take too many hands.

  It isn't an entirely bad idea, but should never be used on any solid state
  electronics as the sparks you will surely get while arranging a good contact
  will cause static discharges that will probably distroy any sensative
  electronics.

  We have one here and tried it and we're pretty experienced solderers
  and we didn't think much of it.

  I doubt it'd handle anything bigger than maybe number 18 AWG wire even if it
  worked.

  My sighted wife who is very good with a soldering iron, tried it
  and had also nothing good to say about it.

  Might work for some folks but I'd not spend the money.

  A medium pencil iron with a good stand which won't
  allow it to slip out is a good starter.

  Guns are also a pain for different reasons,

  Read our soldering series in the Smith-Kettlewell
  Technical File at:
  http://www.ski.org/rerc/sktf

  Tom

  [Non-text portions of this message have been removed]



   

[Non-text portions of this message have been removed]



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