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strategies for high voltage on PCB, wire terminals

S

Spehro Pefhany

Jan 1, 1970
0
Well, your "duck" is still only worth three Washingtons and a
Jefferson. Which is up from a low of two Washingtons, a Roosevelt, and
three Lincolns, three or so years ago but still down from an Indian
squaw, thirty years ago. The looney change your shopkeepers give is
still a losing proposition. ;-)

Not sure it's really "up"-- just looks stable compared to AUD, GBP,
EUR, NZD etc. Presumably those boring balanced budgets at work.


Best regards,
Spehro Pefhany
 
M

Michael A. Terrell

Jan 1, 1970
0
Spehro said:
In USSR-era Eastern European duty-free shops they would give change
from hard currency notes in chocolate bars.


Was it good chocolate?
 
F

Frank Bemelman

Jan 1, 1970
0
Spehro Pefhany said:
Yes, excellent chocolate. ;-)

I bet. But can it compete with the change from hard currency notes
that are given in topless bars? ;-)
 
R

Rich Grise

Jan 1, 1970
0
50 mm would work at 100 volts, too.


Thou means thousand here. "Thou" is shorthand for $1000. We have so
much money we need words like that.

A 'mil' is a short way of saying 'milli-inch'. It's also how the
thickness of plastic film is spec'd. To a machinist, a thou is a
thousandth or an inch, AKA a mil. a "tenth" is 0.0001 = 1/10000.

$1000 is a "grand." ;-)

Cheers!
Rich
 
R

Rich Grise

Jan 1, 1970
0
I'll probably go with .100" (2.5 cm) spacing where it is easy to do. I
want a little overdesign in this, just to remove uncertainty.


I'll take a look at them. I'm still a leaning a little toward the
soldered connections, for simplicity in tough long life use.

Just don't use a soldering GUN! Use a 25-watt pencil, or maybe 40-watt
iron, if you're soldering AWG 14 or fatter. Connectors can be convenient
if you're planning on taking it apart a lot; otherwise, I'd go ahead and
solder them.

Cheers!
Rich
 
P

Pooh Bear

Jan 1, 1970
0
Rich said:
A 'mil' is a short way of saying 'milli-inch'. It's also how the
thickness of plastic film is spec'd. To a machinist, a thou is a
thousandth or an inch, AKA a mil. a "tenth" is 0.0001 = 1/10000.

$1000 is a "grand." ;-)

Cheers!
Rich

Well..... The idea of a milli *inch* seems so obscure to us metricated ppl who are
95% or so of the world population.

Yeah - ok I use inches too - but not *officially* - lol. All mech drgs here are
marked in m and mm.

I have actually seen discussions where US mils got ppl confused who thought they
meant mm.

This doesn't happen if you call it a thou. That's really my point.

Btw - I have no difficulty differentiating between a thousandth of an inch and a
thousand pounds ! Hmmm - that's about 1873 USD currently ! I never imagined the
pound would ever rise against the dollar to that degree. I can recall when it was
a ratio of 3 : 1 too.

Graham
 
S

Spehro Pefhany

Jan 1, 1970
0
A 'mil' is a short way of saying 'milli-inch'. It's also how the
thickness of plastic film is spec'd. To a machinist, a thou is a
thousandth or an inch, AKA a mil. a "tenth" is 0.0001 = 1/10000.

That's right- same region, different domains. I use "mil" when I'm
talking about PCBs and "thou" when I'm talking about metal.
$1000 is a "grand." ;-)

Cheers!
Rich

We use mils for money too. As in "they just bought a fixer-upper in
Rosedale for one-point-four mil".


Best regards,
Spehro Pefhany
 
J

John Larkin

Jan 1, 1970
0
That's right- same region, different domains. I use "mil" when I'm
talking about PCBs and "thou" when I'm talking about metal.


We use mils for money too. As in "they just bought a fixer-upper in
Rosedale for one-point-four mil".

There's a nicely restored Victorian in my neighborhood, 3 small
bedrooms, on the standard 24-foot-wide lot. It has a two-car garage
courtesy of a hydraulic lift system that stacks the cars. Asking 1.7
megabucks.

John
 
J

John Larkin

Jan 1, 1970
0
Btw - I have no difficulty differentiating between a thousandth of an inch and a
thousand pounds ! Hmmm - that's about 1873 USD currently ! I never imagined the
pound would ever rise against the dollar to that degree. I can recall when it was
a ratio of 3 : 1 too.

The classic pre-WWII ratio was about 5:1

John
 
S

Spehro Pefhany

Jan 1, 1970
0
There's a nicely restored Victorian in my neighborhood, 3 small
bedrooms, on the standard 24-foot-wide lot. It has a two-car garage
courtesy of a hydraulic lift system that stacks the cars. Asking 1.7
megabucks.

John


If you consider the uH (micro-house) as a unit of value, it has some
interesting results. Most things are getting cheaper, including all
the major currencies.


Best regards,
Spehro Pefhany
 
W

Winfield Hill

Jan 1, 1970
0
Spehro Pefhany wrote...
If you consider the uH (micro-house) as a unit of value, it has
some interesting results. Most things are getting cheaper,
including all the major currencies.

Not sure, the price of the medium cup of regular coffee I buy
many mornings has gone up from 2.5uH to 3.0uH in recent times.
 
R

Rob Gaddi

Jan 1, 1970
0
Winfield said:
Spehro Pefhany wrote...



Not sure, the price of the medium cup of regular coffee I buy
many mornings has gone up from 2.5uH to 3.0uH in recent times.

3 uH is a lot for a cup of coffee, no wonder you're getting oscillations
against the...wait, wrong thread.

-- Rob
 
S

Spehro Pefhany

Jan 1, 1970
0
3 uH is a lot for a cup of coffee, no wonder you're getting oscillations
against the...wait, wrong thread.

-- Rob

Mine has dropped marginally over 10-15 years from 2uH to 1.8uH.


Best regards,
Spehro Pefhany
 
R

Rich Grise

Jan 1, 1970
0
If you consider the uH (micro-house) as a unit of value, it has some
interesting results. Most things are getting cheaper, including all
the major currencies.

The other day it occurred to me - when my Granddad built a house,
everybody built their own house - it cost mainly labor, maybe about
a month's wages worth. Around the time my folks were buying a house,
a house could be had for about a year's wages. When I bought a house,
they were going for about three years' wages. Nowadays, they're about
ten years' wages.

I wonder if that's merely exponential, or asymptotic, like taxes/
inflation?

Thanks,
Rich
 
K

Keith Williams

Jan 1, 1970
0
The other day it occurred to me - when my Granddad built a house,
everybody built their own house - it cost mainly labor, maybe about
a month's wages worth. Around the time my folks were buying a house,
a house could be had for about a year's wages. When I bought a house,
they were going for about three years' wages. Nowadays, they're about
ten years' wages.

A month's wages? ...must have been a small house or your GF had a
quite nice job. My parent's house was more like a year's salary, and
he did much of the work himself. The house I live in now is likely
worth a bit more than two-years, with the land value half of the value.
I wonder if that's merely exponential, or asymptotic, like taxes/
inflation?

Taxes (both direct and hidden) are a far higher portion of my salary
than they were for my parents. My property tax alone is over 5% of my
salary (and increasing at 6-10%/year).
 
J

John Larkin

Jan 1, 1970
0
The other day it occurred to me - when my Granddad built a house,
everybody built their own house - it cost mainly labor, maybe about
a month's wages worth. Around the time my folks were buying a house,
a house could be had for about a year's wages. When I bought a house,
they were going for about three years' wages. Nowadays, they're about
ten years' wages.


Depends on where you want to live (and how much money you make.)

John
 
S

Spehro Pefhany

Jan 1, 1970
0
The other day it occurred to me - when my Granddad built a house,
everybody built their own house - it cost mainly labor, maybe about
a month's wages worth. Around the time my folks were buying a house,
a house could be had for about a year's wages. When I bought a house,
they were going for about three years' wages. Nowadays, they're about
ten years' wages.

I wonder if that's merely exponential, or asymptotic, like taxes/
inflation?

Thanks,
Rich

So, you're saying wages have dropped from 0.3H to 0.1H from when you
bought a house to now. If you could sell it now, you wouldn't have to
work for the next decade or so. ;-)

http://news.ft.com/cms/s/f269a8f4-c173-11d9-943f-00000e2511c8.html


Best regards,
Spehro Pefhany
 
F

Frank Bemelman

Jan 1, 1970
0
Spehro Pefhany said:
So, you're saying wages have dropped from 0.3H to 0.1H from when you
bought a house to now. If you could sell it now, you wouldn't have to
work for the next decade or so. ;-)

True, but you need a house to live in. If I sold my house, I could
live in my car (or a tent on the beach, brrr) and smoke cigars and
drink Jack Daniels for the rest of my life. Scary ;)
 
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