From: "Ed Price"
References: <firstname.lastname@example.org> <email@example.com>
Subject: Re: what is 100R mean in a schematics?
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
Date: Fri, 03 Jan 2003 00:22:47 GMT
NNTP-Posting-Date: Thu, 02 Jan 2003 19:22:47 EST
Organization: Cox Communications
"~^Johnny^~" wrote in message
> On Thu, 19 Dec 2002 09:19:54 -0800, "RP Henry"
> >"j.b. miller" wrote in message
> >> One hundred Ohms.
> >> the R represents the Decimal Point which may NOT show up the schematic
> >> to printing problems !
> >This seems to be becoming more common.
> >In schematics from European vendors I have seen things like 4k7 meaning
> >kohms, for instance.
> The actual derivation is "radix", not "decimal point", per se, and
> not "resistor". This makes sense, because the same convention can
> be seen used with other components as well, like inductors and
> capacitors. R (radix) is simply replaced by the appropriate suffix as
> found in the older naming conventions...
> also note that radices like u and p are never used ... capacitors are
> expressed in picofarads, as a rule, and a 0.0047 uf cap, for
> instance, would be denoted as 4k7
I always hear that this system was originated because you might not see a
decimal point on a poor photocopy. Why don't we just make better
photocopies? Or select a font with a heftier decimal point for your
original? To me, 4700 pF reads more easily than 4k7.