[Milsurplus] Professionally converted radios

[David Edsall]

Jay and the group,

The NASA soldering standard document is at this URL:

http://www.hq.nasa.gov/office/codeq/doctree/canceled/solder/sldrbch1.pdf

Best 73, David W1TDD

----- Original Message ----- 
From: <jcoward5452 at aol.com>
To: <nerd at verizon.net>
Cc: <milsurplus at mailman.qth.net>
Sent: Friday, November 27, 2009 12:08 PM
Subject: Re: [Milsurplus] Professionally converted radios


>
> I forget how I found it but the NASA soldering standards manual is online 
> somewhere.Lots of pictures and drawings showing  proper technique.
> Jay
>
>
>
> -----Original Message-----
> From: Peter Gottlieb <nerd at verizon.net>
> Cc: milsurplus at mailman.qth.net
> Sent: Fri, Nov 27, 2009 8:52 am
> Subject: Re: [Milsurplus] Professionally converted radios
>
>
> NASA used to have a very nice, thorough, and effective soldering
> ourse.  I still use those techniques quite effectively to this day.
> Good workmanship is more than soldering; the appropriate components and
> echanical layout are needed, and it all must be consistent with good
> lectronic design.  To do a great modification job requires an extensive
> et of skills that few have.
>
> Mike Morrow wrote:
>> There is good work, usable work, and shoddy work...
>>
>
> During my years an officer on a nuclear submarine, I was
> in charge of the Reactor Controls division.  These were
> USN nuclear-trained Electronics Technicians 2/C through
> ETCS.  I usually had to keep myself from interfering when
> observing the soldering skills of many of my people.  They
> were all professionals dealing with some fairly critical
> equipment, yet at least half just did not have the touch
> when it came to making a proper solder joint.
>
> This was a USN-wide problem, so finally schools were
> established to deal with nothing but soldering techniques.
> That helped, except for it not emphasizing the need to use
> *non-conductive* liquid solder flux on PCBs!
>
> Mike / KK5F
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