In a message dated 07/01/2005 22:49:40 GMT Standard Time, craxd1@ezwv.com
writes:
In my opinion, I dont think any instrument can measure the true unloaded
Q exactly due to too many factors or variables such as stray capacitance
and inductance.
Even when measuring the components on their own, the Q meter measures the
apparent Q. Q is a variable, depending how close you are to the self resonant
frequency of a coil, the self capacity of a coil, and the method of measurement
that the Q meter uses.
For a very good treatise on this, see M.G.Scroggie, Second Thoughts on Radio
Theory, Iliffe, London, 1956 pp125 et seq. There's a lot of other good stuff
in this book, too. Sadly, I don't see a copy available on Abebooks.com, but
a library can maybe help.
73
Peter G3RZP
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