[hpsdr] Solder paste question

[Graham / KE9H]

John:

If you want to assemble Pennywhistle in a reflow oven (or similar)
using solder paste, then I second Bill's recommendation to buy
some solder paste from kd5ssj.  He sells it in about one-half
ounce syringes.  It only has a life of a month or two at room
temperature, so don't buy too much at once.  It will probably
last longer in a refrigerator.  One syringe is plenty to build one
Pennywhistle.

If you don't have access to a reflow oven, then some small
diameter solder with a rosin core, and a fine point temperature
controlled iron will work fine for Pennywhistle assembly.

I use Kester 44 solder, size 0.015 or 0.031.

If you want some extra flux, I recommend a flux pen such
as the #186 pen, sold by Mouser # 533-0186.  You do not have
to clean this flux, but if you want to, for aesthetic reasons,
it comes right off with rubbing alcohol and a "Q-tip."

I can't imagine that Home Depot would sell anything appropriate
for electronic reflow assembly.

--- Graham / KE9H

==


On 10/6/2012 10:50 AM, John Koster wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> So far we're talking about 2 different products.
>
> Us old timers remember a product called solder paste (sks flux) which was
> for soldering, but contained no solder. Typically we used rosin core
> solder and didn't use the paste alone for electronic soldering.  The paste
> was typically used for plumbing work.  This was all prior to lead free
> solder.
>
> Surface mount brought a true solder paste onto the market.  As I
> understand it, this is a combination of solder and the 'paste'.
>
> The product from Home depot mentioned by John contains no solder.
>
> On Sat, 6 Oct 2012, Bill Tracey wrote:
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Don't know on the Home Depot stuff -  I've been ordering Solder Paste
>> Syringes from
>> <http://www.kd5ssj.com/solderpaste>http://www.kd5ssj.com/solderpaste
>> with good results over the years.
>>
>> Regards,
>>
>> Bill (kd5tfd)
>>
>> At 09:35 AM 10/6/2012, John wrote:
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>>
>>>
>>> I need some soldering paste to build a TAPR Penny Whistle kit.  A
>>> local ham says he saw some at Home Depot.  I looked at the the Home
>>> Depot web site and found they carry Lincoln Electric Bridigit 4 oz
>>> solder paste (P/N BRPF4POP).
>>>
>>> Has anyone on the list used this product?  Is it definitely non-corrosive?
>>>
>>> The reason I ask is someone at work bought a large bottle of rosin
>>> base flux, but it was meant for wave solder.  The hand built boards
>>> began to corrode and I found this product was supposed to be washed
>>> off after assembly. Before this was discovered,  I used it on a
>>> prototype circuit board which I cleaned with alcohol on pipe
>>> cleaners, but traces under the IC's eventually opened up.  I would
>>> like to get some paste fast, but want to be sure it won't ruin the PC board.
>>>
>>> John,  WoGN
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