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Long term stability of matched resistors?

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  Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 09:33 +0000
    Re: Long term stability of matched resistors? Phil Allison <pallison49@gmail.com> - 2017-02-13 03:10 -0800
      Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 15:27 +0000
    Re: Long term stability of matched resistors? Chris Jones <lugnut808@spam.yahoo.com> - 2017-02-14 00:02 +1100
    Re: Long term stability of matched resistors? Steve Goldstein <sgoldHAM@alum.mit.edu> - 2017-02-13 08:30 -0500
    Re: Long term stability of matched resistors? Spehro Pefhany <speffSNIP@interlogDOTyou.knowwhat> - 2017-02-13 08:55 -0500
    Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-13 08:43 -0800
      Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-13 17:22 +0000
        Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-13 10:23 -0800
        Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-14 20:02 +0100
          Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-14 11:16 -0800
            Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-14 22:45 +0100
              Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-14 14:52 -0800
                Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 15:13 -0800
                  Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 16:35 -0800
                    Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 16:47 -0800
                      Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 17:29 -0800
                        Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-14 17:45 -0800
                          Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-14 18:17 -0800
                          Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-14 18:37 -0800
                Re: Long term stability of matched resistors? Marte Schwarz <marte.schwarz@gmx.de> - 2017-02-15 09:48 +0100
                  Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-15 07:12 -0800
                    Re: Long term stability of matched resistors? bill.sloman@ieee.org - 2017-02-15 20:15 -0800
                    Re: Long term stability of matched resistors? John Larkin <jjlarkin@highlandtechnology.com> - 2017-02-15 20:28 -0800
                      Re: Long term stability of matched resistors? George Herold <gherold@teachspin.com> - 2017-02-16 06:32 -0800
                        Re: Long term stability of matched resistors? John Larkin <jjlarkinxyxy@highlandtechnology.com> - 2017-02-16 09:56 -0800
                          Re: Long term stability of matched resistors? Lasse Langwadt Christensen <langwadt@fonz.dk> - 2017-02-16 11:08 -0800
                          Re: Long term stability of matched resistors? bill.sloman@ieee.org - 2017-02-16 18:10 -0800
                    Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 02:19 -0800
                      Re: Long term stability of matched resistors? Jasen Betts <jasen@xnet.co.nz> - 2017-02-18 09:50 +0000
    Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-16 09:26 +0000
      Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 02:22 -0800
        Re: Long term stability of matched resistors? "Peter Heitzer" <peter.heitzer@rz.uni-regensburg.de> - 2017-02-16 16:04 +0000
          Re: Long term stability of matched resistors? jack4747@gmail.com - 2017-02-16 08:19 -0800

Page 2 of 2 — ← Prev page 1 [2]

#447720

Hi John,
>> may be it is such a denglish word that "should" sound like english but

> Is "so long" originally German?

I don't really think so, as others described. But there are a few funny 
denglisch words here that no native speaker would use so. I remembered 
the "public viewing" that means here in germany a big habbening 
whatching f.ex. soccer on huge places together on a big open cinema 
screen... Some native speekers couldn't understand such use of this term :-)

In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
is that the gostop is over meadows". That was while there where english 
pupils stayed with us. I guess no native speeker can translate this ;-)

And Würzburg is in franconia that was occupied by bavaria therefore it 
is part of bavaria but will never belong to bavaria ;-)

Greetings from Ansbach (not far away from Würzburg)

Marte

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#447742

On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
> Hi John,
> >> may be it is such a denglish word that "should" sound like english but
> 
> > Is "so long" originally German?
> 
> I don't really think so, as others described. But there are a few funny 
> denglisch words here that no native speaker would use so. I remembered 
> the "public viewing" that means here in germany a big habbening 
> whatching f.ex. soccer on huge places together on a big open cinema 
> screen... Some native speekers couldn't understand such use of this term :-)
> 
> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
> is that the gostop is over meadows". That was while there where english 
> pupils stayed with us. I guess no native speeker can translate this ;-)
> 
> And Würzburg is in franconia that was occupied by bavaria therefore it 
> is part of bavaria but will never belong to bavaria ;-)
> 
> Greetings from Ansbach (not far away from Würzburg)
> 
> Marte

Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
I always fantasized that my great great grand father came from Heroldsberg, 
IIRC he listed Nuremburg as his place of origin.  

Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
would come back from Germany with several bottles of Franconia wines.  Sour 
dry stuff... apparently you don't let it out of the country... so it's 
hard to get here in the US.  :^)  

George H. 

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#447831

On Thursday, February 16, 2017 at 2:12:27 AM UTC+11, George Herold wrote:
> On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:

<snip>
 
> Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)

Würzberg .

I went to Libre Office, deleted the "u" and went to "insert special character" which offered "ü" from the Latin-1 subset, which offers all the characters with their diacritical marks used in most of the Latin-based European alphabets.

Lain-A and Latin-B go further. Greek. Arabic, Hebrew and Cyrillic are also available. Thai and Korean are probably available (and lots of others) if I downloaded the relevant modules.

<snip>

-- 
Bill Sloman, Sydney

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#447833

On Wed, 15 Feb 2017 07:12:21 -0800 (PST), George Herold
<gherold@teachspin.com> wrote:

>On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
>> Hi John,
>> >> may be it is such a denglish word that "should" sound like english but
>> 
>> > Is "so long" originally German?
>> 
>> I don't really think so, as others described. But there are a few funny 
>> denglisch words here that no native speaker would use so. I remembered 
>> the "public viewing" that means here in germany a big habbening 
>> whatching f.ex. soccer on huge places together on a big open cinema 
>> screen... Some native speekers couldn't understand such use of this term :-)
>> 
>> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
>> is that the gostop is over meadows". That was while there where english 
>> pupils stayed with us. I guess no native speeker can translate this ;-)
>> 
>> And Würzburg is in franconia that was occupied by bavaria therefore it 
>> is part of bavaria but will never belong to bavaria ;-)
>> 
>> Greetings from Ansbach (not far away from Würzburg)
>> 
>> Marte
>
>Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
>I always fantasized that my great great grand father came from Heroldsberg, 
>IIRC he listed Nuremburg as his place of origin.  
>
>Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
>would come back from Germany with several bottles of Franconia wines.  Sour 
>dry stuff... apparently you don't let it out of the country... so it's 
>hard to get here in the US.  :^)  
>
>George H. 

Larry, the rep who sold us our pick-and-place machine, also makes
wine.

http://www.frogstooth.com/

It's delicious. I made him understand that, for every $100K in
purchases, I expected a bottle of wine. I got a case.

The Brat and I are in one of his pix, the "Private Dinner at your Home
or Business" one. We had a company bbq and he served the wine, for
free.


-- 

John Larkin         Highland Technology, Inc

lunatic fringe electronics 

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#447858

On Wednesday, February 15, 2017 at 11:29:03 PM UTC-5, John Larkin wrote:
> On Wed, 15 Feb 2017 07:12:21 -0800 (PST), George Herold
> <gherold@teachspin.com> wrote:
> 
> >On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
> >> Hi John,
> >> >> may be it is such a denglish word that "should" sound like english but
> >> 
> >> > Is "so long" originally German?
> >> 
> >> I don't really think so, as others described. But there are a few funny 
> >> denglisch words here that no native speaker would use so. I remembered 
> >> the "public viewing" that means here in germany a big habbening 
> >> whatching f.ex. soccer on huge places together on a big open cinema 
> >> screen... Some native speekers couldn't understand such use of this term :-)
> >> 
> >> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
> >> is that the gostop is over meadows". That was while there where english 
> >> pupils stayed with us. I guess no native speeker can translate this ;-)
> >> 
> >> And Würzburg is in franconia that was occupied by bavaria therefore it 
> >> is part of bavaria but will never belong to bavaria ;-)
> >> 
> >> Greetings from Ansbach (not far away from Würzburg)
> >> 
> >> Marte
> >
> >Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
> >I always fantasized that my great great grand father came from Heroldsberg, 
> >IIRC he listed Nuremburg as his place of origin.  
> >
> >Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
> >would come back from Germany with several bottles of Franconia wines.  Sour 
> >dry stuff... apparently you don't let it out of the country... so it's 
> >hard to get here in the US.  :^)  
> >
> >George H. 
> 
> Larry, the rep who sold us our pick-and-place machine, also makes
> wine.
> 
> http://www.frogstooth.com/
> 
> It's delicious. I made him understand that, for every $100K in
> purchases, I expected a bottle of wine. I got a case.
> 
> The Brat and I are in one of his pix, the "Private Dinner at your Home
> or Business" one. We had a company bbq and he served the wine, for
> free.
> 
At Xmas time Andi (German friend) would make Feuerzangenbowle 
https://en.wikipedia.org/wiki/Feuerzangenbowle
Tasty, and guaranteed to put you in a "good mood".  
Hah.. Gemütlichkeit. (copied from wiki article....) 
I wonder if you can get the sugar loafs in the states?   

George H. 
> 
> -- 
> 
> John Larkin         Highland Technology, Inc
> 
> lunatic fringe electronics

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#447886

On Thu, 16 Feb 2017 06:32:52 -0800 (PST), George Herold
<gherold@teachspin.com> wrote:

>On Wednesday, February 15, 2017 at 11:29:03 PM UTC-5, John Larkin wrote:
>> On Wed, 15 Feb 2017 07:12:21 -0800 (PST), George Herold
>> <gherold@teachspin.com> wrote:
>> 
>> >On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
>> >> Hi John,
>> >> >> may be it is such a denglish word that "should" sound like english but
>> >> 
>> >> > Is "so long" originally German?
>> >> 
>> >> I don't really think so, as others described. But there are a few funny 
>> >> denglisch words here that no native speaker would use so. I remembered 
>> >> the "public viewing" that means here in germany a big habbening 
>> >> whatching f.ex. soccer on huge places together on a big open cinema 
>> >> screen... Some native speekers couldn't understand such use of this term :-)
>> >> 
>> >> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
>> >> is that the gostop is over meadows". That was while there where english 
>> >> pupils stayed with us. I guess no native speeker can translate this ;-)
>> >> 
>> >> And Würzburg is in franconia that was occupied by bavaria therefore it 
>> >> is part of bavaria but will never belong to bavaria ;-)
>> >> 
>> >> Greetings from Ansbach (not far away from Würzburg)
>> >> 
>> >> Marte
>> >
>> >Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
>> >I always fantasized that my great great grand father came from Heroldsberg, 
>> >IIRC he listed Nuremburg as his place of origin.  
>> >
>> >Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
>> >would come back from Germany with several bottles of Franconia wines.  Sour 
>> >dry stuff... apparently you don't let it out of the country... so it's 
>> >hard to get here in the US.  :^)  
>> >
>> >George H. 
>> 
>> Larry, the rep who sold us our pick-and-place machine, also makes
>> wine.
>> 
>> http://www.frogstooth.com/
>> 
>> It's delicious. I made him understand that, for every $100K in
>> purchases, I expected a bottle of wine. I got a case.
>> 
>> The Brat and I are in one of his pix, the "Private Dinner at your Home
>> or Business" one. We had a company bbq and he served the wine, for
>> free.
>> 
>At Xmas time Andi (German friend) would make Feuerzangenbowle 
>https://en.wikipedia.org/wiki/Feuerzangenbowle
>Tasty, and guaranteed to put you in a "good mood".  
>Hah.. Gemütlichkeit. (copied from wiki article....) 
>I wonder if you can get the sugar loafs in the states?   
>
>George H. 
>> 
>> -- 
>> 
>> John Larkin         Highland Technology, Inc
>> 
>> lunatic fringe electronics

Two of our favorite people are a Swedish guy and his French wife. They
speak English to one another. Their kid will be trilingual, or more.

They had the grandparents up to Truckee recently, and we fed them all.
Grits and eggs for breakfast, as an experiment. They loved the grits,
the kid too. I gave them a bunch of red beans and rice to go, which
they apparently ate at one sitting. I was afraid that the French
people would be too refined to eat Nawlins food.

They had us over to their cabin for snacks, and the Swedish grand-dad
made Glögg (pronounced gloog), sort of mulled wine crossed with
sangria. It's complicated to make and drink: you add raisins and
shaved almonds before you drink it. I hear that the soaked raisins are
the best part, but some nasty person grabbed mine before I got to
them.



-- 

John Larkin         Highland Technology, Inc
picosecond timing   precision measurement 

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

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#447889

Den torsdag den 16. februar 2017 kl. 18.56.29 UTC+1 skrev John Larkin:
> On Thu, 16 Feb 2017 06:32:52 -0800 (PST), George Herold
> <gherold@teachspin.com> wrote:
> 
> >On Wednesday, February 15, 2017 at 11:29:03 PM UTC-5, John Larkin wrote:
> >> On Wed, 15 Feb 2017 07:12:21 -0800 (PST), George Herold
> >> <gherold@teachspin.com> wrote:
> >> 
> >> >On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
> >> >> Hi John,
> >> >> >> may be it is such a denglish word that "should" sound like english but
> >> >> 
> >> >> > Is "so long" originally German?
> >> >> 
> >> >> I don't really think so, as others described. But there are a few funny 
> >> >> denglisch words here that no native speaker would use so. I remembered 
> >> >> the "public viewing" that means here in germany a big habbening 
> >> >> whatching f.ex. soccer on huge places together on a big open cinema 
> >> >> screen... Some native speekers couldn't understand such use of this term :-)
> >> >> 
> >> >> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
> >> >> is that the gostop is over meadows". That was while there where english 
> >> >> pupils stayed with us. I guess no native speeker can translate this ;-)
> >> >> 
> >> >> And Würzburg is in franconia that was occupied by bavaria therefore it 
> >> >> is part of bavaria but will never belong to bavaria ;-)
> >> >> 
> >> >> Greetings from Ansbach (not far away from Würzburg)
> >> >> 
> >> >> Marte
> >> >
> >> >Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
> >> >I always fantasized that my great great grand father came from Heroldsberg, 
> >> >IIRC he listed Nuremburg as his place of origin.  
> >> >
> >> >Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
> >> >would come back from Germany with several bottles of Franconia wines.  Sour 
> >> >dry stuff... apparently you don't let it out of the country... so it's 
> >> >hard to get here in the US.  :^)  
> >> >
> >> >George H. 
> >> 
> >> Larry, the rep who sold us our pick-and-place machine, also makes
> >> wine.
> >> 
> >> http://www.frogstooth.com/
> >> 
> >> It's delicious. I made him understand that, for every $100K in
> >> purchases, I expected a bottle of wine. I got a case.
> >> 
> >> The Brat and I are in one of his pix, the "Private Dinner at your Home
> >> or Business" one. We had a company bbq and he served the wine, for
> >> free.
> >> 
> >At Xmas time Andi (German friend) would make Feuerzangenbowle 
> >https://en.wikipedia.org/wiki/Feuerzangenbowle
> >Tasty, and guaranteed to put you in a "good mood".  
> >Hah.. Gemütlichkeit. (copied from wiki article....) 
> >I wonder if you can get the sugar loafs in the states?   
> >
> >George H. 
> >> 
> >> -- 
> >> 
> >> John Larkin         Highland Technology, Inc
> >> 
> >> lunatic fringe electronics
> 
> Two of our favorite people are a Swedish guy and his French wife. They
> speak English to one another. Their kid will be trilingual, or more.
> 
> They had the grandparents up to Truckee recently, and we fed them all.
> Grits and eggs for breakfast, as an experiment. They loved the grits,
> the kid too. I gave them a bunch of red beans and rice to go, which
> they apparently ate at one sitting. I was afraid that the French
> people would be too refined to eat Nawlins food.
> 
> They had us over to their cabin for snacks, and the Swedish grand-dad
> made Glögg (pronounced gloog), sort of mulled wine crossed with
> sangria. It's complicated to make and drink: you add raisins and
> shaved almonds before you drink it. I hear that the soaked raisins are
> the best part, but some nasty person grabbed mine before I got to
> them.
> 

the rasins and almond soak in portwine for a few hours, that helps ;)

here Glögg is a christmas thing usually together with these:
https://en.wikipedia.org/wiki/%C3%86bleskiver

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#447953

On Friday, February 17, 2017 at 4:56:29 AM UTC+11, John Larkin wrote:
> On Thu, 16 Feb 2017 06:32:52 -0800 (PST), George Herold
> <gherold@teachspin.com> wrote:
> 
> >On Wednesday, February 15, 2017 at 11:29:03 PM UTC-5, John Larkin wrote:
> >> On Wed, 15 Feb 2017 07:12:21 -0800 (PST), George Herold
> >> <gherold@teachspin.com> wrote:
> >> 
> >> >On Wednesday, February 15, 2017 at 3:49:00 AM UTC-5, Marte Schwarz wrote:
> >> >> Hi John,
> >> >> >> may be it is such a denglish word that "should" sound like english but
> >> >> 
> >> >> > Is "so long" originally German?
> >> >> 
> >> >> I don't really think so, as others described. But there are a few funny 
> >> >> denglisch words here that no native speaker would use so. I remembered 
> >> >> the "public viewing" that means here in germany a big habbening 
> >> >> whatching f.ex. soccer on huge places together on a big open cinema 
> >> >> screen... Some native speekers couldn't understand such use of this term :-)
> >> >> 
> >> >> In earlier times somebody wrotes on our chalkboard at scool: "Head thing 
> >> >> is that the gostop is over meadows". That was while there where english 
> >> >> pupils stayed with us. I guess no native speeker can translate this ;-)
> >> >> 
> >> >> And Würzburg is in franconia that was occupied by bavaria therefore it 
> >> >> is part of bavaria but will never belong to bavaria ;-)
> >> >> 
> >> >> Greetings from Ansbach (not far away from Würzburg)
> >> >> 
> >> >> Marte
> >> >
> >> >Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
> >> >I always fantasized that my great great grand father came from Heroldsberg, 
> >> >IIRC he listed Nuremburg as his place of origin.  
> >> >
> >> >Ahh Franconia, one of my good German friends was/is a wine enthusiast.  He 
> >> >would come back from Germany with several bottles of Franconia wines.  Sour 
> >> >dry stuff... apparently you don't let it out of the country... so it's 
> >> >hard to get here in the US.  :^)  
> >> >
> >> >George H. 
> >> 
> >> Larry, the rep who sold us our pick-and-place machine, also makes
> >> wine.
> >> 
> >> http://www.frogstooth.com/
> >> 
> >> It's delicious. I made him understand that, for every $100K in
> >> purchases, I expected a bottle of wine. I got a case.
> >> 
> >> The Brat and I are in one of his pix, the "Private Dinner at your Home
> >> or Business" one. We had a company bbq and he served the wine, for
> >> free.
> >> 
> >At Xmas time Andi (German friend) would make Feuerzangenbowle 
> >https://en.wikipedia.org/wiki/Feuerzangenbowle
> >Tasty, and guaranteed to put you in a "good mood".  
> >Hah.. Gemütlichkeit. (copied from wiki article....) 
> >I wonder if you can get the sugar loafs in the states?   
> >
> >George H. 
> >> 
> >> -- 
> >> 
> >> John Larkin         Highland Technology, Inc
> >> 
> >> lunatic fringe electronics
> 
> Two of our favorite people are a Swedish guy and his French wife. They
> speak English to one another. Their kid will be trilingual, or more.
> 
> They had the grandparents up to Truckee recently, and we fed them all.
> Grits and eggs for breakfast, as an experiment. They loved the grits,
> the kid too. I gave them a bunch of red beans and rice to go, which
> they apparently ate at one sitting. I was afraid that the French
> people would be too refined to eat Nawlins food.

Strange idea. New Orleans started off French (whence the name) and got bought from Napoleon in the Louisiana Purchase.

http://www.history.com/topics/louisiana-purchase

Some of the locals still speak a sort of French - Cajun French - and the food is definitely French-influenced.

-- 
Bill Sloman, Sydney

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#447845

Il giorno mercoledì 15 febbraio 2017 16:12:27 UTC+1, George Herold ha scritto:

> Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)

If you don't have the umlaut you can always write ue instead of ü (or oe instead of ö or ae instead of ä).

Bye Jack

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#448142

On 2017-02-16, jack4747@gmail.com <jack4747@gmail.com> wrote:
> Il giorno mercoledì 15 febbraio 2017 16:12:27 UTC+1, George Herold ha scritto:
>
>> Sorry for my terrible spelling of Wurzberg.  (I don't know how to add the umlaut.)
>
> If you don't have the umlaut you can always write ue instead of ü (or oe instead of ö or ae instead of ä).

or type it into a search and cut-and-paste.

> Bye Jack


-- 
This email has not been checked by half-arsed antivirus software 

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#447844

Peter Heitzer <peter.heitzer@rz.uni-regensburg.de> wrote:
>If I select metal foil resistors with 1% tolerance so that they match
>to 0.1% can I expect that the matching keeps stable for a longer time
>or will the values drift sooner or later to their 1% tolerance?
>In other words: Do I need resistors with 0.1% initial tolerance for
>long term 0.1% matching?

Meanwhile I found, that Conrad electronic sells 0.1% resistors with
25 ppm tempco (Panasonic ERJ-1GEF2003C). Price for one resistor ist 13 ct,
in 50 quantities it gets low to 5 ct. So I think there is no need to
hassle with 1% resistors.

-- 
Dipl.-Inform(FH) Peter Heitzer, peter.heitzer@rz.uni-regensburg.de

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#447846

Il giorno giovedì 16 febbraio 2017 10:26:20 UTC+1, Peter Heitzer ha scritto:
> Peter Heitzer <peter.heitzer@rz.uni-regensburg.de> wrote:
> >If I select metal foil resistors with 1% tolerance so that they match
> >to 0.1% can I expect that the matching keeps stable for a longer time
> >or will the values drift sooner or later to their 1% tolerance?
> >In other words: Do I need resistors with 0.1% initial tolerance for
> >long term 0.1% matching?
> 
> Meanwhile I found, that Conrad electronic sells 0.1% resistors with
> 25 ppm tempco (Panasonic ERJ-1GEF2003C). Price for one resistor ist 13 ct,
> in 50 quantities it gets low to 5 ct. So I think there is no need to
> hassle with 1% resistors.

You can also buy from mouser.de or digikey.de (or de.farnell.com), which are usually cheaper than Conrad.

Bye Jack

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#447865

jack4747@gmail.com wrote:
>Il giorno giovedì 16 febbraio 2017 10:26:20 UTC+1, Peter Heitzer ha scritto:
>> Peter Heitzer <peter.heitzer@rz.uni-regensburg.de> wrote:
>> >If I select metal foil resistors with 1% tolerance so that they match
>> >to 0.1% can I expect that the matching keeps stable for a longer time
>> >or will the values drift sooner or later to their 1% tolerance?
>> >In other words: Do I need resistors with 0.1% initial tolerance for
>> >long term 0.1% matching?
>> 
>> Meanwhile I found, that Conrad electronic sells 0.1% resistors with
>> 25 ppm tempco (Panasonic ERJ-1GEF2003C). Price for one resistor ist 13 ct,
>> in 50 quantities it gets low to 5 ct. So I think there is no need to
>> hassle with 1% resistors.

>You can also buy from mouser.de or digikey.de (or de.farnell.com), which are usually cheaper than Conrad.

AFAIK they don't sell to private persons. Conrad does and has a shop here.

-- 
Dipl.-Inform(FH) Peter Heitzer, peter.heitzer@rz.uni-regensburg.de

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#447867

Il giorno giovedì 16 febbraio 2017 17:04:11 UTC+1, Peter Heitzer ha scritto:
> jack4747@gmail.com wrote:
> >Il giorno giovedì 16 febbraio 2017 10:26:20 UTC+1, Peter Heitzer ha scritto:
> >> Peter Heitzer <peter.heitzer@rz.uni-regensburg.de> wrote:
> >> >If I select metal foil resistors with 1% tolerance so that they match
> >> >to 0.1% can I expect that the matching keeps stable for a longer time
> >> >or will the values drift sooner or later to their 1% tolerance?
> >> >In other words: Do I need resistors with 0.1% initial tolerance for
> >> >long term 0.1% matching?
> >> 
> >> Meanwhile I found, that Conrad electronic sells 0.1% resistors with
> >> 25 ppm tempco (Panasonic ERJ-1GEF2003C). Price for one resistor ist 13 ct,
> >> in 50 quantities it gets low to 5 ct. So I think there is no need to
> >> hassle with 1% resistors.
> 
> >You can also buy from mouser.de or digikey.de (or de.farnell.com), which are usually cheaper than Conrad.
> 
> AFAIK they don't sell to private persons. Conrad does and has a shop here.

Of course they sell to private persons. You just need to have a credit card.

Bye Jack

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