Conical inductors--still $10!...

[whit3rd]

On Wednesday, July 15, 2020 at 12:31:37 PM UTC-7, John Larkin wrote:

Look at the covid case curves. They went linear very early on, at a
few per cent of the ultimate peak.

Don\'t you people ever analyze systems?

That\'s not analysis, when you aggregate all cases into curves.
Analysis is breaking down the situation into parts, and dealing individually
with the parts.
Drastic measures taken to control the spread of the disease... those are
important parts, and aren\'t visible without analysis. That\'s why John Larkin
doesn\'t see the importance; he\'s not conversant with the analysis principle.

 

[Ricketty C]

On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, edward...@gmail.com wrote:

Just like with Tesla stock at 1500 I won\'t buy it and I won\'t go short either,

Yes, they need to shut down Fremont factory immediately:

https://sanfrancisco.cbslocal.com/2020/07/14/coronavirus-tesla-workers-speak-out-after-industry-blog-reports-dozens-of-workers-tested-positive-for-covid-19/

From time to time I post in a Tesla forum, but it is actually a more hostile environment than this group if you can believe that... well, it is if you are not a fanboi of Tesla. I try to be even handed and much like here, when people disagree with me, I often learn something.

But many are rabid supporters, in particular in the threads about the stock.. Back in January I posted that I thought the price of $500 was rather high and it might be a good time to sell. Others ridiculed me and touted all the facts about the amazing things Tesla was going to deliver on. If they all panned out, they were right, in a few years of growth the stock would be valued at $500 based on profits, etc, the standard valuations.

I suggested there could easily be bumps in the road and with the price support that can only be viewed as exuberant, the price could easily come down. I cited the coronavirus (not pandemic because they were not calling it that yet) as a possible cause of such a drop, only as an example, not as any sort of a forecast. Little did I realize I was accurate in that a big drop in price would indeed happen from the virus. What I was wrong about was that the stock price would rise over $900 (where I sold more stock) before dropping to just below $500, lol. I was expecting something more like $300 given the huge uncertainty of maintaining sales and profits.

Meanwhile based on further irrational exuberance, the stock has climbed over $1500 (I sold the last of mine around $1100) based on good quarterly numbers in view of the virus.

I literally have no idea what the stock will do now. On one hand the factory in Fremont may have to close. Tesla was handed bad news from Germany about overselling their full self driving future features. There will be bumps in the road that we can\'t gauge the impact of.

On the other hand they have a factory in Shanghai that pumps out a large number of cars and the factory in Berlin, Germany will be on line by the end of the year. They are also working toward having a Texas factory for the semi truck in 2021. So the good news can be expected to continue and the stock price is a total crap shoot.

I just know I\'m not buying it above $900. If it returns to the $500 price range I might consider it. I find it curious that brokers will rate the stock a buy, but set their target price significantly lower than the current price, or rate it a hold with a target price well above the current price. Go figure!

Musk himself said the stock was overvalued around $500 I think.

--

Rick C.

-+ Get 1,000 miles of free Supercharging
-+ Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, edward...@gmail.com wrote:

Just like with Tesla stock at 1500 I won\'t buy it and I won\'t go short either,

Yes, they need to shut down Fremont factory immediately:

https://sanfrancisco.cbslocal.com/2020/07/14/coronavirus-tesla-workers-speak-out-after-industry-blog-reports-dozens-of-workers-tested-positive-for-covid-19/

From time to time I post in a Tesla forum, but it is actually a more hostile environment than this group if you can believe that... well, it is if you are not a fanboi of Tesla. I try to be even handed and much like here, when people disagree with me, I often learn something.

But many are rabid supporters, in particular in the threads about the stock.. Back in January I posted that I thought the price of $500 was rather high and it might be a good time to sell. Others ridiculed me and touted all the facts about the amazing things Tesla was going to deliver on. If they all panned out, they were right, in a few years of growth the stock would be valued at $500 based on profits, etc, the standard valuations.

I suggested there could easily be bumps in the road and with the price support that can only be viewed as exuberant, the price could easily come down. I cited the coronavirus (not pandemic because they were not calling it that yet) as a possible cause of such a drop, only as an example, not as any sort of a forecast. Little did I realize I was accurate in that a big drop in price would indeed happen from the virus. What I was wrong about was that the stock price would rise over $900 (where I sold more stock) before dropping to just below $500, lol. I was expecting something more like $300 given the huge uncertainty of maintaining sales and profits.

Meanwhile based on further irrational exuberance, the stock has climbed over $1500 (I sold the last of mine around $1100) based on good quarterly numbers in view of the virus.

I literally have no idea what the stock will do now. On one hand the factory in Fremont may have to close. Tesla was handed bad news from Germany about overselling their full self driving future features. There will be bumps in the road that we can\'t gauge the impact of.

On the other hand they have a factory in Shanghai that pumps out a large number of cars and the factory in Berlin, Germany will be on line by the end of the year. They are also working toward having a Texas factory for the semi truck in 2021. So the good news can be expected to continue and the stock price is a total crap shoot.

I just know I\'m not buying it above $900. If it returns to the $500 price range I might consider it. I find it curious that brokers will rate the stock a buy, but set their target price significantly lower than the current price, or rate it a hold with a target price well above the current price. Go figure!

Musk himself said the stock was overvalued around $500 I think.

--

Rick C.

-+ Get 1,000 miles of free Supercharging
-+ Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, edward...@gmail.com wrote:

Just like with Tesla stock at 1500 I won\'t buy it and I won\'t go short either,

Yes, they need to shut down Fremont factory immediately:

https://sanfrancisco.cbslocal.com/2020/07/14/coronavirus-tesla-workers-speak-out-after-industry-blog-reports-dozens-of-workers-tested-positive-for-covid-19/

From time to time I post in a Tesla forum, but it is actually a more hostile environment than this group if you can believe that... well, it is if you are not a fanboi of Tesla. I try to be even handed and much like here, when people disagree with me, I often learn something.

But many are rabid supporters, in particular in the threads about the stock.. Back in January I posted that I thought the price of $500 was rather high and it might be a good time to sell. Others ridiculed me and touted all the facts about the amazing things Tesla was going to deliver on. If they all panned out, they were right, in a few years of growth the stock would be valued at $500 based on profits, etc, the standard valuations.

I suggested there could easily be bumps in the road and with the price support that can only be viewed as exuberant, the price could easily come down. I cited the coronavirus (not pandemic because they were not calling it that yet) as a possible cause of such a drop, only as an example, not as any sort of a forecast. Little did I realize I was accurate in that a big drop in price would indeed happen from the virus. What I was wrong about was that the stock price would rise over $900 (where I sold more stock) before dropping to just below $500, lol. I was expecting something more like $300 given the huge uncertainty of maintaining sales and profits.

Meanwhile based on further irrational exuberance, the stock has climbed over $1500 (I sold the last of mine around $1100) based on good quarterly numbers in view of the virus.

I literally have no idea what the stock will do now. On one hand the factory in Fremont may have to close. Tesla was handed bad news from Germany about overselling their full self driving future features. There will be bumps in the road that we can\'t gauge the impact of.

On the other hand they have a factory in Shanghai that pumps out a large number of cars and the factory in Berlin, Germany will be on line by the end of the year. They are also working toward having a Texas factory for the semi truck in 2021. So the good news can be expected to continue and the stock price is a total crap shoot.

I just know I\'m not buying it above $900. If it returns to the $500 price range I might consider it. I find it curious that brokers will rate the stock a buy, but set their target price significantly lower than the current price, or rate it a hold with a target price well above the current price. Go figure!

Musk himself said the stock was overvalued around $500 I think.

--

Rick C.

-+ Get 1,000 miles of free Supercharging
-+ Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 2:13:16 PM UTC-4, Lasse Langwadt Christensen wrote:

onsdag den 15. juli 2020 kl. 20.04.55 UTC+2 skrev Ricketty C:
On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, Pimpom wrote:
On 7/15/2020 9:14 PM, Joe Gwinn wrote:
On 15 Jul 2020 14:32:46 GMT, Rob <nomail@example.com> wrote:

jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
One of my most common causes of writing ECOs against new designs is
that the LEDs are too bright. Gotta do that again today.

It is even more true for blue leds than for green. When a device
has a blue indicator LED, it usually is far too bright. Both my PC
and my router have indicator lights that, when not taped over, cause
a large blue spot to appear on the opposite wall.

The best use of this I\'ve seen is Bosch dishwashers, the models that
have no visible controls or indicators when the door is closed:

They use a blue LED to project a spot on the floor - if the spot is
steady, the diswasher is happily progressing through its cycle. If
blinking, go figure out why.

I used a blue LED projection as an indicator in a custom-built
product I made last year. The central unit is housed in a white
plastic box which is completely closed except for an antenna and
a USB port. Going by a last minute inspiration, I projected the
blue LED at the inside of the box from about 2cm away instead of
having it poke through the wall. The result is a diffused circle
of blue light. The customer loved it. The LED current is 1.5mA.

I think I\'ve seen clock that show their LEDs through a white plastic case. Blue LEDs behind white are very attractive I think. I much prefer blue LEDs to red ones.


I\'m sure I\'ve seen some standard that specifies that red should be reserved for errors and warnings

You can find red LED clocks all over the place. I think that standard applies only to indicators intended to indicate status, not time keeping numeric LEDs.

--

Rick C.

++ Get 1,000 miles of free Supercharging
++ Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 2:13:16 PM UTC-4, Lasse Langwadt Christensen wrote:

onsdag den 15. juli 2020 kl. 20.04.55 UTC+2 skrev Ricketty C:
On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, Pimpom wrote:
On 7/15/2020 9:14 PM, Joe Gwinn wrote:
On 15 Jul 2020 14:32:46 GMT, Rob <nomail@example.com> wrote:

jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
One of my most common causes of writing ECOs against new designs is
that the LEDs are too bright. Gotta do that again today.

It is even more true for blue leds than for green. When a device
has a blue indicator LED, it usually is far too bright. Both my PC
and my router have indicator lights that, when not taped over, cause
a large blue spot to appear on the opposite wall.

The best use of this I\'ve seen is Bosch dishwashers, the models that
have no visible controls or indicators when the door is closed:

They use a blue LED to project a spot on the floor - if the spot is
steady, the diswasher is happily progressing through its cycle. If
blinking, go figure out why.

I used a blue LED projection as an indicator in a custom-built
product I made last year. The central unit is housed in a white
plastic box which is completely closed except for an antenna and
a USB port. Going by a last minute inspiration, I projected the
blue LED at the inside of the box from about 2cm away instead of
having it poke through the wall. The result is a diffused circle
of blue light. The customer loved it. The LED current is 1.5mA.

I think I\'ve seen clock that show their LEDs through a white plastic case. Blue LEDs behind white are very attractive I think. I much prefer blue LEDs to red ones.


I\'m sure I\'ve seen some standard that specifies that red should be reserved for errors and warnings

You can find red LED clocks all over the place. I think that standard applies only to indicators intended to indicate status, not time keeping numeric LEDs.

--

Rick C.

++ Get 1,000 miles of free Supercharging
++ Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 2:13:16 PM UTC-4, Lasse Langwadt Christensen wrote:

onsdag den 15. juli 2020 kl. 20.04.55 UTC+2 skrev Ricketty C:
On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, Pimpom wrote:
On 7/15/2020 9:14 PM, Joe Gwinn wrote:
On 15 Jul 2020 14:32:46 GMT, Rob <nomail@example.com> wrote:

jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
One of my most common causes of writing ECOs against new designs is
that the LEDs are too bright. Gotta do that again today.

It is even more true for blue leds than for green. When a device
has a blue indicator LED, it usually is far too bright. Both my PC
and my router have indicator lights that, when not taped over, cause
a large blue spot to appear on the opposite wall.

The best use of this I\'ve seen is Bosch dishwashers, the models that
have no visible controls or indicators when the door is closed:

They use a blue LED to project a spot on the floor - if the spot is
steady, the diswasher is happily progressing through its cycle. If
blinking, go figure out why.

I used a blue LED projection as an indicator in a custom-built
product I made last year. The central unit is housed in a white
plastic box which is completely closed except for an antenna and
a USB port. Going by a last minute inspiration, I projected the
blue LED at the inside of the box from about 2cm away instead of
having it poke through the wall. The result is a diffused circle
of blue light. The customer loved it. The LED current is 1.5mA.

I think I\'ve seen clock that show their LEDs through a white plastic case. Blue LEDs behind white are very attractive I think. I much prefer blue LEDs to red ones.


I\'m sure I\'ve seen some standard that specifies that red should be reserved for errors and warnings

You can find red LED clocks all over the place. I think that standard applies only to indicators intended to indicate status, not time keeping numeric LEDs.

--

Rick C.

++ Get 1,000 miles of free Supercharging
++ Tesla referral code - https://ts.la/richard11209

 

[whit3rd]

On Wednesday, July 15, 2020 at 11:01:59 AM UTC-7, Ricketty C wrote:

> If the current at low voltages is truly logarithmic, does that mean there is a current at zero or even negative voltages? So a diode will pump out very low levels of power? Perhaps the level of power is below the uncertainty principle level of detection like the quantum foam?

The diode equation has an exponential part, and a very small constant part; the
saturation current (usually IS in a SPICE model) is the reverse current one expects
at negative bias, but it\'s in the 1E-16 amp range, so the package and printed wiring
leakage are usually more important.

 

[whit3rd]

On Wednesday, July 15, 2020 at 11:01:59 AM UTC-7, Ricketty C wrote:

> If the current at low voltages is truly logarithmic, does that mean there is a current at zero or even negative voltages? So a diode will pump out very low levels of power? Perhaps the level of power is below the uncertainty principle level of detection like the quantum foam?

The diode equation has an exponential part, and a very small constant part; the
saturation current (usually IS in a SPICE model) is the reverse current one expects
at negative bias, but it\'s in the 1E-16 amp range, so the package and printed wiring
leakage are usually more important.

 

[Ricketty C]

On Wednesday, July 15, 2020 at 8:01:28 AM UTC-4, Bob Engelhardt wrote:

On 7/15/2020 12:16 AM, Bill Sloman wrote:
...
It probably won\'t work on John Larkin who ...

This is getting really old. Why don\'t you give it a rest?

Give what a rest exactly? Providing information that others wish to minimize or directly addressing the shortcomings of Larkin?

I would be happy to never mention Larkin and the pandemic again if Larkin stops spouting his crapola.

I mean really... first he tries to tie minor flareups in countries in their winter season as if it were the second wave of the pandemic, then tries to tie massive flareups in the southern US to the use of air conditioning while totally ignoring the opening of such areas.

Larkin just refuses to accept the very clear and very easily understood connection between disease spreading behavior and the spread of the disease. It\'s almost like he has a compulsion.

I think I respond to Larkin\'s irrational behavior so strongly because to me he represents the illogical thinking of many of our politicians. At least the politicians have an excuse in that they don\'t understand the basic math of a pandemic. Oh yeah, Larkin isn\'t so good with math either.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[Ricketty C]

On Wednesday, July 15, 2020 at 8:01:28 AM UTC-4, Bob Engelhardt wrote:

On 7/15/2020 12:16 AM, Bill Sloman wrote:
...
It probably won\'t work on John Larkin who ...

This is getting really old. Why don\'t you give it a rest?

Give what a rest exactly? Providing information that others wish to minimize or directly addressing the shortcomings of Larkin?

I would be happy to never mention Larkin and the pandemic again if Larkin stops spouting his crapola.

I mean really... first he tries to tie minor flareups in countries in their winter season as if it were the second wave of the pandemic, then tries to tie massive flareups in the southern US to the use of air conditioning while totally ignoring the opening of such areas.

Larkin just refuses to accept the very clear and very easily understood connection between disease spreading behavior and the spread of the disease. It\'s almost like he has a compulsion.

I think I respond to Larkin\'s irrational behavior so strongly because to me he represents the illogical thinking of many of our politicians. At least the politicians have an excuse in that they don\'t understand the basic math of a pandemic. Oh yeah, Larkin isn\'t so good with math either.

--

Rick C.

- Get 1,000 miles of free Supercharging
- Tesla referral code - https://ts.la/richard11209

 

[server]

On Wednesday, July 15, 2020 at 12:47:37 PM UTC-7, Ricketty C wrote:

On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, edward...@gmail.com wrote:
Just like with Tesla stock at 1500 I won\'t buy it and I won\'t go short either,

Yes, they need to shut down Fremont factory immediately:

https://sanfrancisco.cbslocal.com/2020/07/14/coronavirus-tesla-workers-speak-out-after-industry-blog-reports-dozens-of-workers-tested-positive-for-covid-19/

From time to time I post in a Tesla forum, but it is actually a more hostile environment than this group if you can believe that... well, it is if you are not a fanboi of Tesla. I try to be even handed and much like here, when people disagree with me, I often learn something.

They defied Alameda County order to shutdown before, now there are more than 100 positive cases. State and County officials just ignored it. I guess \"Money before Life\".

 

[server]

On Wednesday, July 15, 2020 at 12:47:37 PM UTC-7, Ricketty C wrote:

On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, edward...@gmail.com wrote:
Just like with Tesla stock at 1500 I won\'t buy it and I won\'t go short either,

Yes, they need to shut down Fremont factory immediately:

https://sanfrancisco.cbslocal.com/2020/07/14/coronavirus-tesla-workers-speak-out-after-industry-blog-reports-dozens-of-workers-tested-positive-for-covid-19/

From time to time I post in a Tesla forum, but it is actually a more hostile environment than this group if you can believe that... well, it is if you are not a fanboi of Tesla. I try to be even handed and much like here, when people disagree with me, I often learn something.

They defied Alameda County order to shutdown before, now there are more than 100 positive cases. State and County officials just ignored it. I guess \"Money before Life\".

 

[Lasse Langwadt Christensen]

onsdag den 15. juli 2020 kl. 21.55.04 UTC+2 skrev Ricketty C:

On Wednesday, July 15, 2020 at 2:13:16 PM UTC-4, Lasse Langwadt Christensen wrote:
onsdag den 15. juli 2020 kl. 20.04.55 UTC+2 skrev Ricketty C:
On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, Pimpom wrote:
On 7/15/2020 9:14 PM, Joe Gwinn wrote:
On 15 Jul 2020 14:32:46 GMT, Rob <nomail@example.com> wrote:

jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
One of my most common causes of writing ECOs against new designs is
that the LEDs are too bright. Gotta do that again today.

It is even more true for blue leds than for green. When a device
has a blue indicator LED, it usually is far too bright. Both my PC
and my router have indicator lights that, when not taped over, cause
a large blue spot to appear on the opposite wall.

The best use of this I\'ve seen is Bosch dishwashers, the models that
have no visible controls or indicators when the door is closed:

They use a blue LED to project a spot on the floor - if the spot is
steady, the diswasher is happily progressing through its cycle. If
blinking, go figure out why.

I used a blue LED projection as an indicator in a custom-built
product I made last year. The central unit is housed in a white
plastic box which is completely closed except for an antenna and
a USB port. Going by a last minute inspiration, I projected the
blue LED at the inside of the box from about 2cm away instead of
having it poke through the wall. The result is a diffused circle
of blue light. The customer loved it. The LED current is 1.5mA.

I think I\'ve seen clock that show their LEDs through a white plastic case. Blue LEDs behind white are very attractive I think. I much prefer blue LEDs to red ones.


I\'m sure I\'ve seen some standard that specifies that red should be reserved for errors and warnings

You can find red LED clocks all over the place. I think that standard applies only to indicators intended to indicate status, not time keeping numeric LEDs.

maybe that is just a side effect of red being first led color and thus most commonly available?

 

[Lasse Langwadt Christensen]

onsdag den 15. juli 2020 kl. 21.55.04 UTC+2 skrev Ricketty C:

On Wednesday, July 15, 2020 at 2:13:16 PM UTC-4, Lasse Langwadt Christensen wrote:
onsdag den 15. juli 2020 kl. 20.04.55 UTC+2 skrev Ricketty C:
On Wednesday, July 15, 2020 at 12:47:46 PM UTC-4, Pimpom wrote:
On 7/15/2020 9:14 PM, Joe Gwinn wrote:
On 15 Jul 2020 14:32:46 GMT, Rob <nomail@example.com> wrote:

jlarkin@highlandsniptechnology.com <jlarkin@highlandsniptechnology.com> wrote:
One of my most common causes of writing ECOs against new designs is
that the LEDs are too bright. Gotta do that again today.

It is even more true for blue leds than for green. When a device
has a blue indicator LED, it usually is far too bright. Both my PC
and my router have indicator lights that, when not taped over, cause
a large blue spot to appear on the opposite wall.

The best use of this I\'ve seen is Bosch dishwashers, the models that
have no visible controls or indicators when the door is closed:

They use a blue LED to project a spot on the floor - if the spot is
steady, the diswasher is happily progressing through its cycle. If
blinking, go figure out why.

I used a blue LED projection as an indicator in a custom-built
product I made last year. The central unit is housed in a white
plastic box which is completely closed except for an antenna and
a USB port. Going by a last minute inspiration, I projected the
blue LED at the inside of the box from about 2cm away instead of
having it poke through the wall. The result is a diffused circle
of blue light. The customer loved it. The LED current is 1.5mA.

I think I\'ve seen clock that show their LEDs through a white plastic case. Blue LEDs behind white are very attractive I think. I much prefer blue LEDs to red ones.


I\'m sure I\'ve seen some standard that specifies that red should be reserved for errors and warnings

You can find red LED clocks all over the place. I think that standard applies only to indicators intended to indicate status, not time keeping numeric LEDs.

maybe that is just a side effect of red being first led color and thus most commonly available?

 

[Peabody]

Just wanted to report that I burned the bootloader to make the 328P run on
the internal 8MHz oscillator, then reflashed the sleep current test sketch.
It still drew 150uA.

So then I removed everything else from the board, one item at a time, and
tested again after each removal. But with only the processor remaining, I
still get 150 uA. So I think that confirms to my satisfaction that
something is wrong with the processor chips. Anyway, I\'ve order another
batch of Minis from a new source. I hope they will do better. Thanks for
everyone\'s comments and suggestions.

 

[Peabody]

Just wanted to report that I burned the bootloader to make the 328P run on
the internal 8MHz oscillator, then reflashed the sleep current test sketch.
It still drew 150uA.

So then I removed everything else from the board, one item at a time, and
tested again after each removal. But with only the processor remaining, I
still get 150 uA. So I think that confirms to my satisfaction that
something is wrong with the processor chips. Anyway, I\'ve order another
batch of Minis from a new source. I hope they will do better. Thanks for
everyone\'s comments and suggestions.

 

[John Larkin]

On Wed, 15 Jul 2020 12:45:40 -0700 (PDT), whit3rd <whit3rd@gmail.com>
wrote:

On Wednesday, July 15, 2020 at 12:31:37 PM UTC-7, John Larkin wrote:

Look at the covid case curves. They went linear very early on, at a
few per cent of the ultimate peak.

Don\'t you people ever analyze systems?

That\'s not analysis, when you aggregate all cases into curves.

Are single cases exponential? Would you graph single cases?

How can you plot the progress of an epidemic without aggregating
cases?

Analysis is breaking down the situation into parts, and dealing individually
with the parts.
Drastic measures taken to control the spread of the disease... those are
important parts, and aren\'t visible without analysis. That\'s why John Larkin
doesn\'t see the importance; he\'s not conversant with the analysis principle.

Word salad. Insults. That\'s all you\'ve got.

 

[John Larkin]

On Wed, 15 Jul 2020 12:38:20 -0700 (PDT), Simon S Aysdie
<gwhite@ti.com> wrote:

On Tuesday, July 14, 2020 at 6:01:54 AM UTC-7, Phil Hobbs wrote:
So I was chatting with my local Mini Circuits rep, who also handles
Gowanda. He asked if I was interested in conical inductors, which I
certainly am, and how much I wanted to pay for them.

Remembering that JL had said that the Coilcraft patent had expired, I
said \"forty cents in reels\".

Turns out that Gowanda won\'t go below $10 apiece in reels. I pointed
out that I mostly wanted to use it with BFP640s and really wasn\'t going
to use a $10 inductor to decouple a 20-cent transistor--especially since
I can use series-connected 0201/0402/0603 inductors and beads to do
almost as good a job, for $0.12 total.

Those things are just ordinary ferrite or powdered iron, wound with
ordinary copper, and can\'t be that hard to make, so once the patent(s)
expire, it\'s hard to imagine how they can maintain that pricing level.

What gives, do you suppose?

I suppose they are harder to make than we\'d like, although I don\'t know why.

I have used Gowanda and Piconics. Yep--still pricy even though the patents are out.

My latest idea is to emulate a conical with a series of 2-4 \"stepped sizes\" of CCI ferrite core 0201,0402, 0603 inductors. I haven\'t had time to develop a library of \"favorite combinations.\" Some people are hesitant to use these coils above the first self resonance, but it is fine to do so.

We\'ve done series strings of inductors and beads, but they do have
resonances that need additional damping parts. This is time domain,
where we want very clean step responses. For RF, you wouldn\'t need to
be so pickey.

 

[whit3rd]

On Wednesday, July 15, 2020 at 11:01:59 AM UTC-7, Ricketty C wrote:

> If the current at low voltages is truly logarithmic, does that mean there is a current at zero or even negative voltages? So a diode will pump out very low levels of power? Perhaps the level of power is below the uncertainty principle level of detection like the quantum foam?

The diode equation has an exponential part, and a very small constant part; the
saturation current (usually IS in a SPICE model) is the reverse current one expects
at negative bias, but it\'s in the 1E-16 amp range, so the package and printed wiring
leakage are usually more important.