Workplace Injury

[Mike Coon]

In article <frvu9fdi6dqv0k5pnbh6ql5di9savm89v5@4ax.com>,
jlarkin@highland_atwork_technology.com says...

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

Do you mean another finger? Where can you get those?

Mike.

 

pcdhobbs@gmail.com wrote in
news:1b601922-3660-4c90-947d-3851879d5e1f@googlegroups.com:

You'd think that after decades of soldering, I'd have learned that
you just can't solder fingers.

Try indium-tin eutectic and an ultrasonic iron. The right flux
helps too.

Cheers

Phil Hobbs

Cyanoacrylate works. Solders fingers to nearly anything.

 

On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org wrote:

On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done thatTLS in decades. I mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last. I might need
another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not get a blister and not need Neosporin.

Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the third-degree
burn seemed like a miracle afterwards -- it didn't hurt, not even a
little bit, didn't get red or angry, and healed up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds. Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed inflammation,
which it certainly does, but I still healed well. It's worked well
for me. Of course those incidents were a few decades ago...might not
work as well today.

Cheers,
James Arthur

 

[Winfield Hill]

John Larkin wrote...

On 4/21/2020 7:23 PM, John Larkin wrote:

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

I prefer ice cream sandwiches. ...

They might work better if you left them on your hand,
instead of landing them in your mouth.


--
Thanks,
- Win

 

[Phil Hobbs]

On 2020-04-22 10:39, Phil Hobbs wrote:

On 2020-04-22 10:34, dagmargoodboat@yahoo.com wrote:
On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org wrote:
On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder down an
SC79
varicap. Haven't done thatTLS in decades. I mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last. I
might need
another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not get
a blister and not need  Neosporin.

                                            Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the third-degree
burn seemed like a miracle afterwards -- it didn't hurt, not even a
little bit, didn't get red or angry, and healed up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds.  Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed inflammation,
which it certainly does, but I still healed well. It's worked well
for me. Of course those incidents were a few decades ago...might not
work as well today.

Inflammation is needed for infections, much less so for superficial burns.

You can also cure blisters instantaneously by draining them and gluing
the flap down with cyanoacrylate.

Friction blisters, I mean, not burn blisters.

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]

On 2020-04-22 10:34, dagmargoodboat@yahoo.com wrote:

On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org wrote:
On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done thatTLS in decades. I mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last. I might need
another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not get a blister and not need Neosporin.

Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the third-degree
burn seemed like a miracle afterwards -- it didn't hurt, not even a
little bit, didn't get red or angry, and healed up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds. Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed inflammation,
which it certainly does, but I still healed well. It's worked well
for me. Of course those incidents were a few decades ago...might not
work as well today.

Inflammation is needed for infections, much less so for superficial burns.

You can also cure blisters instantaneously by draining them and gluing
the flap down with cyanoacrylate.

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

 

dagmargoodboat@yahoo.com wrote in
news:52788fa2-a586-4ec5-8538-ad3cc1a90edd@googlegroups.com:

On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org
wrote:
On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder
down an SC79 varicap. Haven't done thatTLS in decades. I
mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last.
I might need another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not
get a blister and not need Neosporin.

Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the
third-degree burn seemed like a miracle afterwards -- it didn't
hurt, not even a little bit, didn't get red or angry, and healed
up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds. Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed
inflammation, which it certainly does, but I still healed well.
It's worked well for me. Of course those incidents were a few
decades ago...might not work as well today.

Cheers,
James Arthur

Unseasoned Aldolph's meat enderizer.

Best thing for 2nd degree and above burns. in lue of
hospitalization.

The burns instutute says so too.

 

[Tom Gardner]

On 22/04/20 15:39, Phil Hobbs wrote:

On 2020-04-22 10:34, dagmargoodboat@yahoo.com wrote:
On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org wrote:
On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done thatTLS in decades. I mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last. I might need
another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not get a
blister and not need  Neosporin.

                                            Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the third-degree
burn seemed like a miracle afterwards -- it didn't hurt, not even a
little bit, didn't get red or angry, and healed up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds.  Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed inflammation,
which it certainly does, but I still healed well. It's worked well
for me. Of course those incidents were a few decades ago...might not
work as well today.

Inflammation is needed for infections, much less so for superficial burns.

You can also cure blisters instantaneously by draining them and gluing the flap
down with cyanoacrylate.

I drain them with a needle that has been heated in a gas
flame, then gentle pressure to exude the liquid. That
produces a minimal hole and minimal risk of infection.

I then put a piece of fabric /sticking/[1] plaster over
it, a dab of disinfectant that soaks into the pad over
the hole, and leave it for a week. I know you aren't
supposed to do the latter, but I haven't had problems.

That technique has worked even in "difficult" areas
like the foot.

[1] surprisingly difficult to get nowadays. Most
plasters are non-sticking plasters that fall off
after a couple of hours. I imagine that increases
the demand for plasters and stops wimps whining.

 

On 22 Apr 2020 07:08:25 -0700, Winfield Hill <winfieldhill@yahoo.com>
wrote:

John Larkin wrote...

On 4/21/2020 7:23 PM, John Larkin wrote:

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

I prefer ice cream sandwiches. ...

They might work better if you left them on your hand,
instead of landing them in your mouth.

There's an optimal algorithm for cooling the finger and eating the
sandwich as it melts. It stops the pain and tastes good.

It was pretty seriously burned, a good hit in the barrel of my Metcal.
Looks pretty good today.

I was squinting through my Mantis at my little board bolted into a
chocolate tin, pulling against all the cables still connected, pulling
the Metcal cord in the opposite direction, trying to solder an SC79
diode in tweezers into a SOT23 footprint, hoping I had the polarity
right on a part about as big as some bacteria with basically invisible
laser markings. Not a single scut bunny available to do it for me.

Worst of all, that was the last ice cream sandwich.

It's my spare-time Colpitts project. The skyworks varicap is rated for
15 volts max, but the data sheet stops at 8 volts, so I have to
buy+try parts and plot frequency-voltage curves. I only need a
fraction of a pF trim, a roughly a thousand PPM frequency, so I'm
running way out on the curve.

The hyperabrupt parts are (I think) supposed to make the VCO frequency
linear on applied voltage, but I think that works if the dominant
capacitance is the varicap itself, and you run in the low voltage part
of the curve. Does anybody know about that? People sell very linear
VCOs and the control voltages are small.

Maybe I can talk the FPGA guy into linearizing the varicap in his
math. It affects the control loop.



--

John Larkin Highland Technology, Inc

Science teaches us to doubt.

Claude Bernard

 

[Phil Hobbs]

On 2020-04-22 11:16, jlarkin@highlandsniptechnology.com wrote:

On 22 Apr 2020 07:08:25 -0700, Winfield Hill <winfieldhill@yahoo.com
wrote:

John Larkin wrote...

On 4/21/2020 7:23 PM, John Larkin wrote:

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

I prefer ice cream sandwiches. ...

They might work better if you left them on your hand,
instead of landing them in your mouth.

There's an optimal algorithm for cooling the finger and eating the
sandwich as it melts. It stops the pain and tastes good.

It was pretty seriously burned, a good hit in the barrel of my Metcal.
Looks pretty good today.

I was squinting through my Mantis at my little board bolted into a
chocolate tin, pulling against all the cables still connected, pulling
the Metcal cord in the opposite direction, trying to solder an SC79
diode in tweezers into a SOT23 footprint, hoping I had the polarity
right on a part about as big as some bacteria with basically invisible
laser markings. Not a single scut bunny available to do it for me.

Worst of all, that was the last ice cream sandwich.

It's my spare-time Colpitts project. The skyworks varicap is rated for
15 volts max, but the data sheet stops at 8 volts, so I have to
buy+try parts and plot frequency-voltage curves. I only need a
fraction of a pF trim, a roughly a thousand PPM frequency, so I'm
running way out on the curve.

The hyperabrupt parts are (I think) supposed to make the VCO frequency
linear on applied voltage, but I think that works if the dominant
capacitance is the varicap itself, and you run in the low voltage part
of the curve. Does anybody know about that? People sell very linear
VCOs and the control voltages are small.

Hyperabrupts are fabbed using epitaxy to make a graded doping density
that falls off as some inverse fractional power of height (distance from
the junction).

That way it takes more delta-V to deplete the layers nearest the
junction, where the delta-C is fastest, and less to deplete further out.
If you do it right you can make your VCO nice and linear.

The inverse fractional power law obviously doesn't extend all the way to
the junction.

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 Larkin]

On Wed, 22 Apr 2020 02:54:12 -0700 (PDT), pcdhobbs@gmail.com wrote:

You'd think that after decades of soldering, I'd have learned that you
just can't solder fingers.

Try indium-tin eutectic and an ultrasonic iron. The right flux helps too.

Cheers

Phil Hobbs

When I was a kid I dropped a big glob of molten solder on my barefoot
toe. It stuck.

The other painful thing was stepping on an upside-down DIP ic.

Engineers should wear shoes.

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

 

[bitrex]

On 4/22/2020 11:00 AM, DecadentLinuxUserNumeroUno@decadence.org wrote:

dagmargoodboat@yahoo.com wrote in
news:52788fa2-a586-4ec5-8538-ad3cc1a90edd@googlegroups.com:

On Tuesday, April 21, 2020 at 8:50:27 PM UTC-4, dca...@krl.org
wrote:
On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:
On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder
down an SC79 varicap. Haven't done thatTLS in decades. I
mean, burn my finger.

I put an ice cream sandwichTLS on it, but that didn't last.
I might need another one


Never ice a burn injury.

Bad advice.

Cheers

Phil Hobbs

+ 1

If you get ice or other cold bit on the burned area, you will not
get a blister and not need Neosporin.

Dan

When I last burned myself with a soldering iron, I was distracted
stirring an ice-bath, calibrating a temperature sensor. Plunging
my finger into the ice bath within a few seconds of the
third-degree burn seemed like a miracle afterwards -- it didn't
hurt, not even a little bit, didn't get red or angry, and healed
up just fine.

The next time I got burned was soldering copper plumbing with a
torch, when solder gushed out of the joint onto my forearm. Ice,
direct, in perhaps thirty seconds. Same trick, worked great.

Phil says later that ice is bad 'cause it stops needed
inflammation, which it certainly does, but I still healed well.
It's worked well for me. Of course those incidents were a few
decades ago...might not work as well today.

Cheers,
James Arthur

Unseasoned Aldolph's meat enderizer.

Best thing for 2nd degree and above burns. in lue of
hospitalization.

The burns instutute says so too.

He never got a "third-degree burn" from a soldering iron /eyeroll

 

bitrex <user@example.net> wrote in
news:7C%nG.42508$AE7.17897@fx41.iad:
snip

> He never got a "third-degree burn" from a soldering iron /eyeroll

You must be ill educated. A 700° F soldering iron tip can most
certainly inflict third degree burn level damage. Especially the
typically even hotter than that shaft! Eyeroll indeed, putz. A third
degree burn can also be had from a motorcycle exhaust, and they are not
even as hot as the iron. Just more surface area.

 

[Pimpom]

On 4/22/2020 5:13 PM, jlarkin@highlandsniptechnology.com wrote:

On Wed, 22 Apr 2020 11:57:35 +0100, Mike Coon
gravity@mjcoon.plus.com> wrote:

In article <frvu9fdi6dqv0k5pnbh6ql5di9savm89v5@4ax.com>,
jlarkin@highland_atwork_technology.com says...

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

Do you mean another finger? Where can you get those?

Mike.

Once I knocked a soldering iron off a table and caught it in mid-air.
Only once.

I can't seem to get rid of the habit of shaking a soldering iron
to get rid of excess solder from the tip. In the summer I often
work in shorts and slippers. You know what's coming: I sometimes
splatter a drop on a bare arm, thigh or foot. I no longer even
flinch unless it's a big drop.

Catching an iron in flight is an order of magnitude above that. I
salute you.

 

[bitrex]

On 4/22/2020 7:43 AM, jlarkin@highlandsniptechnology.com wrote:

On Wed, 22 Apr 2020 11:57:35 +0100, Mike Coon
gravity@mjcoon.plus.com> wrote:

In article <frvu9fdi6dqv0k5pnbh6ql5di9savm89v5@4ax.com>,
jlarkin@highland_atwork_technology.com says...

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

Do you mean another finger? Where can you get those?

Mike.

Once I knocked a soldering iron off a table and caught it in mid-air.
Only once.

WARNING: HOT IRON. HOLD ONLY BY NON-HOT END

 

[bitrex]

On 4/22/2020 7:43 AM, jlarkin@highlandsniptechnology.com wrote:

On Wed, 22 Apr 2020 11:57:35 +0100, Mike Coon
gravity@mjcoon.plus.com> wrote:

In article <frvu9fdi6dqv0k5pnbh6ql5di9savm89v5@4ax.com>,
jlarkin@highland_atwork_technology.com says...

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

Do you mean another finger? Where can you get those?

Mike.

Once I knocked a soldering iron off a table and caught it in mid-air.
Only once.

If I build a new-manufacture product with a vacuum tube's enclosure
within reach of the user should I put a "WARNING: HOT SURFACE" label
next to it? Probably a good idea, lots of youngsters have never
encountered them before.

 

[Michael Terrell]

On Tuesday, April 21, 2020 at 7:56:15 PM UTC-4, Phil Hobbs wrote:

On 2020-04-21 19:48, bitrex wrote:
On 4/21/2020 7:23 PM, John Larkin wrote:


I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.


Never ice a burn injury.

Bad advice.

It has bee about 35 year since I saw something falling off someone else's workbench out the corner of my eye. I caught a hot soldering iron on its way to the floor. I grabbed a tube of silicone grease and covered the damaged skin within seconds. It kept the skin from drying out by keeping air from the burn. IA few days later, the dead skin started to peel off and it left no scaring.

 

On Tuesday, April 21, 2020 at 7:23:58 PM UTC-4, John Larkin wrote:

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

--

John Larkin Highland Technology, Inc
picosecond timing precision measurement

jlarkin att highlandtechnology dott com
http://www.highlandtechnology.com

Scraping the bottom of the barrel for conversation with that one. Is someone holding you prisoner?

 

Michael Terrell <terrell.michael.a@gmail.com> wrote in
news:6efaab58-6eaf-4d18-a22a-6a19ea592486@googlegroups.com:

On Tuesday, April 21, 2020 at 7:23:58 PM UTC-4, John Larkin wrote:
I burned my finger on my soldering iron, trying to solder down an
SC79 varicap. Haven't done that in decades. I mean, burn my
finger.

I put an ice cream sandwich on it, but that didn't last. I might
need another one.

I heard that Nancy Pelosi has two $12,000 freezers full of ice
cream.

She also has a pearl collection larger than your entire, pathetic net
worth, putz! You have something against Americans being successful,
you commie putz motherfucker?

 

[Michael Terrell]

On Tuesday, April 21, 2020 at 7:23:58 PM UTC-4, John Larkin wrote:

I burned my finger on my soldering iron, trying to solder down an SC79
varicap. Haven't done that in decades. I mean, burn my finger.

I put an ice cream sandwich on it, but that didn't last. I might need
another one.

I heard that Nancy Pelosi has two $12,000 freezers full of ice cream.