[sdiy] really basic question .. tolerance

[John L Marshall]

But, weren't you saying the tolerance ADDS. 1% + 1% = 2%.

I see it as still 1%.


Take care,
John
www.sound-photo.com
---------------------------------------------------------------------------

----- Original Message -----
From: "Tim Ressel" <madhun2001 at yahoo.com>
To: "John L Marshall" <john.l.marshall at gte.net>; "diysynth"
<diy_list at analog-synth.de>; <synth-diy at dropmix.xs4all.nl>
Sent: Saturday, January 18, 2003 2:36 PM
Subject: Re: [sdiy] really basic question .. tolerance


> Rules... We don't need no stinkin' rules!
>
> Let's do the math:
>
> 100 ohms +/- 1% --> +/- 1 ohm --> 99 to 101 ohms
>
> in series, worse case: 99+99=198 or 101+101=202
> which is +/- 2 ohms, which is 1% of 200 ohms
>
> unequal values:
>
> 100 ohms 1% & 200 ohms 1%
> 100 ohms +/- 1% --> +/- 1 ohm --> 99 to 101 ohms
> 200 ohms +/- 1% --> +/- 2 ohm --> 198 to 202 ohms
>
> in series, worse case: 99+198=297 or 101+202=303
> which is +/- 3 ohms, which is 1% of 300 ohms
>
> clear now?
>
> --tim
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Mail Plus - Powerful. Affordable. Sign up now.
> http://mailplus.yahoo.com
>