[sdiy] Equation notation

[Paul Perry]

I expect that by R1||R2||R3 they mean,
the value of R1 in parallel with R2 and R3.

And here is how to calculate that:
http://www.ehow.com/how_5031182_calculate-resistors-parallel.html

----- Original Message ----- 
From: "Justin Owen"
>In an equation, what do the two 'stove pipe' (?) characters mean - || (hope 
>those characters make it through).
>...or more to the point - how do I calculate/resolve an equation using 
>these characters.
>i.e. (1 + 10/R1||R2||R3)
>It's from a summing amp calculation.

paul perry Melbourne Australia