[Lowfer] LRC Meter

[Ed Phillips]

Peter Barick wrote:
> 
> >>> ashlockw@hotmail.com 10/23/03 11:32AM >>>
> > Mouser sells a B and K 615-875B for $189 which has the same ranges.
> 
> >a 1/Q reading (as mine does) which I find to be helpfull in getting a
> rough
> > idea on what the Q of inductors and capacitors will be like at 185k.
> >Bill
> -------------------------
> Interesting, can you tell a bit about the 1/Q fcn., what does mean? why
> that expression of Q?
> 
> Gee, another way to view this LRC is $90., or 2X, above the kit one. I
> need a LRC for the known L, R, and C fcns. So why the 1/Q?
> 
> Peter

	1/Q is the dissipation factor or loss tangent which has been used to
express loss in dielectrics and other materials for over 100 years. 
It's the quantity you normally see under properties of dielectrics.  Q
is a slightly later concept.  Easier to measure d than Q for capacitors
and Q rather than d for inductors.  As for measurements I much prefer a
good bridge over the "LCR meters" which are potentially susceptible to
producing all sorts of erroneous results.  For Q I prefer a Q meter or
some form of parallel or series loss resistance measurement.

Ed

Ed