Wiring stereo jack directly to IC? [Repair]

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From: mm on 11 Jan 2010 01:10

On Sun, 10 Jan 2010 22:39:01 GMT, David
<postings(a)REMOVE-TO-REPLYconfidential-counselling.com> wrote:

>In article <afbik51666ll913td721atop30jggrcb9s(a)4ax.com>,
> mm <NOPSAMmm2005(a)bigfoot.com> wrote:
>
>>
>> (When I was a summer employee of the US Naval Avionics facility in
>> Indianapolis in 1965, they were working on a way to solder all the
>> connections on a circuit board at one time. They had a couple
>> "machines" each with river of solder a foot wide that they would
>> barely dip the whole circuit board into. They'd been working on this
>> for months or more, plus the three months I was there. I walked by
>> every day but didn't work in that department. I think my boss said it
>> was hard to keep the surface of river flat.
>>
>> Who did figure out how to do this, and do any of you know when it
>> happened?
>>
>> Do any of you know what the process is called?
>
>This is how Kriesler Australia soldered components to PCBs for their
>transister radios around 1960 - 64.
>
>The PCBs were on a sort of travelling frame which first took the board
>over a rosin spray then into the solder bath - the height was such that
>only the lower (etched) side of the board dipped into the molten solder.

Yes, exactly.

>After the solder bath the board went to a production line where first it
>was checked for dry joints, then aligned and tested for function.
>
>It was a proven process with thousand of sets made this way
>
>If only the Navy had thought to ask any of the radio set mfgs they could
>have saved themselves a lot of work, as I presume it wasn't only
>Kriesler that used this method.

I know it's popular to bash anything related to the government, but I
don't believe the Navy was't aware of what private industry had done.

I suspect they were looking for higher reliability or something.

If your transistor radio breaks, you do without it for a day until you
can get another one.

If your Walleye** missile breaks, you've wasted an entire expensive
missile, and allowed the enemy to escape and do whatever harm they had
planned to do. Plus a portion of everything it took to get the
plane to the battle-area.

**The were also working on the Wall-eye (sp?) air-to-land missile in
1965, with a camera on gimbals in the nose of the missile, with which
the pilot could aim the missile and it, with his help I think, could
keep the camera aimed at the target, and the missile brain would make
sure the missile was also heading for the target. When fully
operational, itt was supposed to be able to enter a doorway. In Viet
Nam I guess. I don't know if it ever worked then, but it was part of
the development of the missiles we saw in the first Gulf War in 1990.
I wish I knew the details of those 25 years.

Well, here's a little bit about it:
http://en.wikipedia.org/wiki/Walleye_missile
And it looks like the Walleye II is still operational;
http://en.wikipedia.org/wiki/File:A-6E_Intruder_releasing_a_Walleye_II.jpg

>David

From: mm on 11 Jan 2010 01:11

From: Sansui Samari on 11 Jan 2010 07:19

On Jan 10, 2:39 pm, David <posti...(a)REMOVE-TO-REPLYconfidential-
counselling.com> wrote:
> In article <afbik51666ll913td721atop30jggrc...(a)4ax.com>,
>
> mm <NOPSAMmm2...(a)bigfoot.com> wrote:
>
> > (When I was a summer employee of the US Naval Avionics facility in
> > Indianapolis in 1965, they were working on a way to solder all the
> > connections on a circuit board at one time. They had a couple
> > "machines" each with river of solder a foot wide that they would
> > barely dip the whole circuit board into. They'd been working on this
> > for months or more, plus the three months I was there. I walked by
> > every day but didn't work in that department. I think my boss said it
> > was hard to keep the surface of river flat.
>
> > Who did figure out how to do this, and do any of you know when it
> > happened?
>
> > Do any of you know what the process is called?
>
> This is how Kriesler Australia soldered components to PCBs for their
> transister radios around 1960 - 64.
>
> The PCBs were on a sort of travelling frame which first took the board
> over a rosin spray then into the solder bath - the height was such that
> only the lower (etched) side of the board dipped into the molten solder.
>
> After the solder bath the board went to a production line where first it
> was checked for dry joints, then aligned and tested for function.
>
> It was a proven process with thousand of sets made this way
>
> If only the Navy had thought to ask any of the radio set mfgs they could
> have saved themselves a lot of work, as I presume it wasn't only
> Kriesler that used this method.
>
> David

Thanks for the history lesson. I worked on wave solder, "and smt"
machines for years. Never really knew the history. The wave systems
stilll run pretty much exactly the same way, less some preheats, and
nitrogen gas here and there. I always thought it was neat that if you
dropped your wrench in the solder bath, it would float on top. Loved
those things.
------------------

From: Michael A. Terrell on 11 Jan 2010 15:35

David wrote:
>
> In article <afbik51666ll913td721atop30jggrcb9s(a)4ax.com>,
> mm <NOPSAMmm2005(a)bigfoot.com> wrote:
>
> >
> > (When I was a summer employee of the US Naval Avionics facility in
> > Indianapolis in 1965, they were working on a way to solder all the
> > connections on a circuit board at one time. They had a couple
> > "machines" each with river of solder a foot wide that they would
> > barely dip the whole circuit board into. They'd been working on this
> > for months or more, plus the three months I was there. I walked by
> > every day but didn't work in that department. I think my boss said it
> > was hard to keep the surface of river flat.
> >
> > Who did figure out how to do this, and do any of you know when it
> > happened?
> >
> > Do any of you know what the process is called?
>
> This is how Kriesler Australia soldered components to PCBs for their
> transister radios around 1960 - 64.
>
> The PCBs were on a sort of travelling frame which first took the board
> over a rosin spray then into the solder bath - the height was such that
> only the lower (etched) side of the board dipped into the molten solder.
>
> After the solder bath the board went to a production line where first it
> was checked for dry joints, then aligned and tested for function.
>
> It was a proven process with thousand of sets made this way
>
> If only the Navy had thought to ask any of the radio set mfgs they could
> have saved themselves a lot of work, as I presume it wasn't only
> Kriesler that used this method.

Were any of those 'radio set mfgs' certified for 'mil spec'
soldering? It's one thing to splash solder on a cheap paper based,
consumer grade PC board and quite another to have it pass inspection for
military applications.

--
Greed is the root of all eBay.

From: Michael A. Terrell on 11 Jan 2010 15:37

Sansui Samari wrote:
>
> Thanks for the history lesson. I worked on wave solder, "and smt"
> machines for years. Never really knew the history. The wave systems
> stilll run pretty much exactly the same way, less some preheats, and
> nitrogen gas here and there. I always thought it was neat that if you
> dropped your wrench in the solder bath, it would float on top. Loved
> those things.

The last reflow oven I used was a Heller, about eight years ago. We
were building 17 layer VME instrumentation boards and some smaller six
to eight layer boards.

--
Greed is the root of all eBay.

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