Fred Abse wrote:
On Sat, 04 Sep 2010 07:56:51 +0100, Eeyore wrote:

Do please especially explain the relevance of the letter Q to indicate a
transistor or U for an IC.

No sillier than "L" for inductance, or "Z" for impedance, or "Y" for
admittance, or "B" for susceptance, or "G" for conductance.

What kind of equations do you use for calculating impedances ?

For example Z = 2.pi.f.L is a common one.

L is clearly a well-understood 'shorthand' for inductance along with R
and C for resistance and capacitance.

I don't know of any components requiring designation on a schematic or
PCB that require defining by Y, B or G, hence your argument is
fallacious not least that G is nerely the inverse of R and therefore
redundant.

How often do you buy 'conductances' from suppliers btw ?

Graham