Why are transistors called "Q"?

From: Jim Beacon <jim_at_g1jbg.co.uk>
Date: Sat Feb 26 06:00:39 2005

> Q is a measurement of Ham Radio antennae -- altho just perzactly what it's
> supposed to measure I'm not 100% sure. (I'm sure I could google for it...)

Q is the "qaulity" factor of a tuned circuit, and is applied to tuned
circuits, capacitors and inductors, and is the relationship between
reactance and resistance. In a tuned circuit, it can also be expressed as a
function of the bandwidth of the circuit at a given frequency.
> I do know that I have a Heathkit "Q" measuring device in my basement...

I have a unit made by Marconi Instruments, but it is a designers tool rather
than a repair tool, so it gets little use.
Received on Sat Feb 26 2005 - 06:00:39 GMT

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