more gold FR4...

Am 06.05.22 um 20:54 schrieb John Larkin:

There is some liquid that you can dip copperclad into that plates it
with tin. It\'s not any better than bare copper.
Click to expand...

This one is good and much better than copper:

<
https://www.buerklin.com/de/Zinnpulver-f%C3%BCr-Glanzzinn-B%C3%A4der-Seno-3211/p/13L217
>

The Cu surface must be _absolutely_ clean. They have a special
eraser rubber for it, quite abrasive. \"Poliblock\"

For me. it works best to put the etched Bungard presensitized
board without photo mask under UV again and then use the NaOH
developper to remove the photo resist.

cheers, Gerhard
 
On Fri, 6 May 2022 12:06:22 -0700 (PDT), John Walliker
<jrwalliker@gmail.com> wrote:

On Friday, 6 May 2022 at 13:30:59 UTC+1, Jasen Betts wrote:
On 2022-05-05, Martin Rid <martin...@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is 1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet, which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?
Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

If you do need to dissolve a thin layer of gold without using really nasty reagents,
then an iodine solution is quite effective.

John
Click to expand...

But I don\'t want to dissolve it.

One board house wanted $1200 a square foot. Cirexx did 3 sq feet for
$500.



--

Anybody can count to one.

- Robert Widlar
 
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.
Click to expand...

Solder it and spray on the conformal coating of your choice.
 
rbowman wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in
message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for
protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels
nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min
order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with
certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
 plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is
gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.
Click to expand...

Doesn\'t work. You have to coat it first.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:

On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.
Click to expand...

No thanks. I like the gold.



--

Anybody can count to one.

- Robert Widlar
 
On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:

On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:

On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.

No thanks. I like the gold.
Click to expand...

As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?

Joe Gwinn
 
On Friday, May 6, 2022 at 10:56:23 AM UTC-7, Rich S wrote:

...I remember long ago a former
co worker (who once ran elec assy lines at GE, Schenectady, NY)
mention something called \"Stay Bright\" -- when ordering bare
non-plated etched PCBs. Searching for that now turns up
other unrelated things.
Click to expand...

Yeah, I recall that stuff; it just rubs on, and by electroless plating puts a bit
of silver on a copper surface. Don\'t see any suppliers, but this shows up
on a web search
<https://www.protext.com//Metals/SilverChloridePlating1.htm>
 
On Sat, 07 May 2022 17:27:48 -0400, Joe Gwinn <joegwinn@comcast.net>
wrote:

On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:

On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:

On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.

No thanks. I like the gold.

As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?

Joe Gwinn
Click to expand...

I only need to please myself.

And of course sell things. I built this and brought it into a meeting
with a potential customer. They were very impressed.

https://www.dropbox.com/sh/nlnyna48107t0km/AADzQiRs7zww682eL_swPFONa?dl=0

It\'s a Pockels Cell driver. The production version is water cooled and
makes 1200 volt pulses at 5 MHz.




--

Anybody can count to one.

- Robert Widlar
 
On 05/07/2022 01:59 PM, Phil Hobbs wrote:
rbowman wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in
message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for
protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels
nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min
order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with
certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is
gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.

Doesn\'t work. You have to coat it first.

Cheers

Phil Hobbs
Click to expand...
https://electrolube.com/knowledge_base/what-are-conformal-coatings/
https://www.techspray.com/the-essential-guide-to-conformal-coating
 
rbowman wrote:
On 05/07/2022 01:59 PM, Phil Hobbs wrote:
rbowman wrote:
On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in
message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for
protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels
nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min

order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with
certainties, he shall end with doubts, but if he will be
content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
 plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and
solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is
gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.

Doesn\'t work.  You have to coat it first.


https://electrolube.com/knowledge_base/what-are-conformal-coatings/
https://www.techspray.com/the-essential-guide-to-conformal-coating
Click to expand...

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.

Cheers

Phil Hobbs


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
Joe Gwinn wrote:
On Sat, 07 May 2022 13:18:48 -0700, jlarkin@highlandsniptechnology.com
wrote:

On Fri, 6 May 2022 20:10:23 -0600, rbowman <bowman@montana.com> wrote:

On 05/06/2022 08:30 AM, jlarkin@highlandsniptechnology.com wrote:
On Fri, 06 May 2022 14:23:14 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:

On a sunny day (Fri, 06 May 2022 07:04:26 -0700) it happened
jlarkin@highlandsniptechnology.com wrote in
g8aa7httutkr62pphmi2k0376kvovt2fcj@4ax.com>:

On Fri, 6 May 2022 12:01:38 -0000 (UTC), Jasen Betts
usenet@revmaps.no-ip.org> wrote:

On 2022-05-05, Martin Rid <martin_riddle@verison.net> wrote:
John Larkin <jlarkin@highland_atwork_technology.com> Wrote in message:r
I was almost out of the ENIG gold-plated FR4 that I dremel for protocircuits, so we had Cirexx make us some more. This is
1/2 oz copper,which dremels nicely.https://www.dropbox.com/s/wgzr56dx43z14rp/Gold_FR4_3x.jpg?raw=1Min order was 3 square feet,
which is maybe a 10 year supply.-- If a man will begin with certainties, he shall end with doubts, but if he will be content to
begin with doubts he shall end in certainties.Francis Bacon

Certainly better than tin plate. Has anyone tried to etch gold
plated boards with ferric chloride?


Gold is fairly inert, but Mercury will dissolve it. the nickel
can probably then be plated off leaving the copper which can
them be etched chemically.

Seems kind of messy.

Why dissolve it? The gold plating cost $150 a square foot.

If I want an ENIG etched PCB, I can just buy one, with vias and solder
mask and all that. The big slabs of gold plated FR4 are for quick
dermeled prototypes.

https://www.dropbox.com/s/yd19osiwz1z74s4/HV_Proto_2.JPG?raw=1

https://www.dropbox.com/s/pa9mu4ehtrjei8m/Z384_1.JPG?raw=1

https://www.dropbox.com/s/zaftysxtgclxj82/Z412_Proto.JPG?raw=1

The big question is:
What difference does it make for those small proto boards if it is gold plated?
else it is just show.

It solders beautifully and doesn\'t tarnish. Plain copper will show
etched fingerprints and grunge in a couple of weeks.

https://www.dropbox.com/s/ejbuveodplo5m61/BreadBoards.jpg?raw=1

Beautiful things work better.





Solder it and spray on the conformal coating of your choice.

No thanks. I like the gold.

As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
Click to expand...

So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?

You must not have dealt with many customers. ;)

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

[...]

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.

Cheers

Phil Hobbs
Click to expand...

So how do you remove fingerprints? Isoprop, acetone, soap and water?

(need to plan my next crime:)



--
MRM
 
On Saturday, May 7, 2022 at 5:10:14 PM UTC-7, Phil Hobbs wrote:
So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?

http://hobbs-eo.com
Click to expand...

Guess you never had the chance to see the Jim Williams workbench exhibit
at CHM. Bummer.

The electrons don\'t care about aesthetics and the photons will get over it.
The customers might, but you don\'t want those sorts of customers anyway.

-- john, KE5fx
 
On a sunny day (Sat, 07 May 2022 17:27:48 -0400) it happened Joe Gwinn
<joegwinn@comcast.net> wrote in <fpod7ht1b63l5niqipk45kumqqemakn2tq@4ax.com>:

As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
Click to expand...

Its a good investment....
https://goldprice.org/live-gold-price.html
 
On a sunny day (Sat, 07 May 2022 17:27:48 -0400) it happened Joe Gwinn
<joegwinn@comcast.net> wrote in <fpod7ht1b63l5niqipk45kumqqemakn2tq@4ax.com>:

As engineers, don\'t we need to come up with a pseudo technical reason,
like a gold surface is smoother and keeps its low surface resistivity
despite sweaty palms and caustic looks?
Click to expand...

Its a good investment....
https://goldprice.org/live-gold-price.html

But you cannot eat gold, better have some prepper stuff too.
As enjineers keep some trannies and a solar powered solderig iron.
ehh
Any day now
 
Mike Monett wrote:
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

[...]

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.


So how do you remove fingerprints? Isoprop, acetone, soap and water?

(need to plan my next crime:)
Click to expand...

I usually clean the bare board with soap and water, or occasionally some
Barkeeper\'s Friend or 0000 steel wool with soap.

Once the board is dry, you hit it with the Krylon, then just do the
dead-bug thing (using SMT breakouts when needed) as usual. It solders
like a bare board.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
John Miles, KE5FX wrote:
On Saturday, May 7, 2022 at 5:10:14 PM UTC-7, Phil Hobbs wrote:
So something that looks like a Yugo is fine, as long as the mechanicals
underneath are good?

http://hobbs-eo.com

Guess you never had the chance to see the Jim Williams workbench exhibit
at CHM. Bummer.
Click to expand...

I\'ve seen photos of it. My bench isn\'t super neat either, but most of
my stuff has microwave transistors in it these days, so I don\'t use that
many huge through-hole parts anymore.

The electrons don\'t care about aesthetics and the photons will get over it.
The customers might, but you don\'t want those sorts of customers anyway.

-- john, KE5fx
Click to expand...

Au contraire. A nice-looking dead bug gizmo in an aluminum stomp box is
easy to make and IME really makes the punters take an interest in how
the gizmo works.

I only bother if it\'s for a POC proto. For little testers and stuff
like that, I don\'t much care about the fingerprints.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
http://hobbs-eo.com
 
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

Mike Monett wrote:
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

[...]

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.


So how do you remove fingerprints? Isoprop, acetone, soap and water?

(need to plan my next crime:)

I usually clean the bare board with soap and water, or occasionally some
Barkeeper\'s Friend or 0000 steel wool with soap.

Once the board is dry, you hit it with the Krylon, then just do the
dead-bug thing (using SMT breakouts when needed) as usual. It solders
like a bare board.

Cheers

Phil Hobbs
Click to expand...

Thanks!



--
MRM
 
On Sun, 8 May 2022 01:36:19 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

Mike Monett wrote:
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

[...]

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.


So how do you remove fingerprints? Isoprop, acetone, soap and water?

(need to plan my next crime:)

I usually clean the bare board with soap and water, or occasionally some
Barkeeper\'s Friend or 0000 steel wool with soap.

Once the board is dry, you hit it with the Krylon, then just do the
dead-bug thing (using SMT breakouts when needed) as usual. It solders
like a bare board.

Cheers

Phil Hobbs
Click to expand...

--

Anybody can count to one.

- Robert Widlar
 
On Sun, 8 May 2022 01:36:19 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:

Mike Monett wrote:
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:

[...]

I know a fair amount about conformal coatings--I\'ve used them fairly
often, as I said upthread.

Thing is: if you apply them to bare copper, on top of a lot of sweaty
fingerprints, they don\'t keep the copper from corroding.

You want to put the coating on _before_ the fingerprints.


So how do you remove fingerprints? Isoprop, acetone, soap and water?

(need to plan my next crime:)

I usually clean the bare board with soap and water, or occasionally some
Barkeeper\'s Friend or 0000 steel wool with soap.

Once the board is dry, you hit it with the Krylon, then just do the
dead-bug thing (using SMT breakouts when needed) as usual. It solders
like a bare board.

Cheers

Phil Hobbs
Click to expand...

Dead bug is confusing, not to mention insect cruelty.

https://www.dropbox.com/s/9av93ul8148zdjm/Z356_SN2.JPG?raw=1



--

Anybody can count to one.

- Robert Widlar
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top