On Friday 30 March 2007 06:47, Ed wrote:
I agree that it's .66 ohm. Although all manufacturers have their own
way of creating part numbers, they're all pretty consistent with
numbers to the right of R being decimal. If it was a 66 Ohm resistor
the part number would be 5W66RJ. Here's an excerpt from the Ohmite
catalog that tells you how to create their part numbers. The part
number for 5 watt .7 Ohm resistor would be 805FR70 - they just happen
to use F instead of W.
Of course,
R - means Ohm
k - means kilo Ohms (1 000 ohms)
M - means mega Ohms (1 000 000 ohms)
and because dot point is very small -:) this multipliers is used as dot point
1R0 - 1.0 Ohm
1k0 - 1.0 kilo Ohm - 1 000 Ohm
R68 - 0.68 Ohm
!!! WARNING !!!
R may be used also as numbering on schematics eg. R33 - resistor number 33
numbering may be also printed on PCB, but not on components in this case
resistors.
New way of create value numbers is value folloved multiplier
If you see in resistor eg. 332 it's 33 * 10^2 = 3k3 (= 33 plus two zero),
this is typical for SMD resistors and resistors marked by color code
Radek
