Re: Fuseable resistor value.

Smitty Two <prestwhich@xxxxxxxxxxxxx> wrote in message
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In article <fdjhqi$5e4$1@xxxxxxxxxxxxxxx>,
"N Cook" <diverse8@xxxxxxxxx> wrote:

Smitty Two <prestwhich@xxxxxxxxxxxxx> wrote in message
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In article <fdjelk$mvf$1@xxxxxxxxxxxxxxx>,
"N Cook" <diverse8@xxxxxxxxx> wrote:

Dave <dspear99ca@xxxxxxxxx> wrote in message
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"N Cook" <diverse8@xxxxxxxxx> wrote in message
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<wattersmt@xxxxxxxxx> wrote in message


marked bands of red,yellow,yellow,gold, silver.


the third yellow band implies

Read your post. red, yellow,yellow,gold, silver. What third
yellow
band?
If you're talking about the gold, that'd be the multiplier on a
5-band
resistor, or 10E-1. Silver is tolerance.


I read it as 24.4 at 10% tolerance, so 21.96-26.84.

Dave S.



alright correction , putting in an apostrophe or two
for
the third yellow band
read
the third, yellow band,

it still does not explain the tolerance illogicality
Why and how would anyone stock a 3/5 band range of resistors which
are
only
10 percent tolerance?


--

We call those commas, not apostrophes, in the U.S., but I understood
your phrasing the first time. I agree that a precision resistor with a
10% tolerance makes no sense. I'd make it 240K. Fifth band is
sometimes
used for reliability (i.e. MTBF) AIUI.

But why a 2W 240K resistor in something that is unlikely ever to have
more
than 350V across it.
I've not taken apart yet so it may well never see any high voltages.


Well, that's a half of a watt. Slightly over-engineered but not
inexplicable. You sure aren't going to put 350 volts on a 24.4 ohm
resistor. And there's no such thing as a four band resistor with 10%
tolerance. My supposition stands.

I've not removed the security screws yet, just the top cover so don't know
what its functional area is yet.

I looked around all the 5 band resistors that I have laying about , all 1/2
or 1/3W , not 2W, but they are all brown , 1percent, tolerance band which is
logical but silver 10 percent makes no sense at all.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/



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