Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
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and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
Q help! - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
Twitter were overwhelmingly dominating online personal interaction, and RF Cafe
Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: Q help! Posted: Mon Aug 08, 2005 6:39 am
Joined: Tue Aug 02, 2005 1:44 am
People always say a high-Q peaking inductor or low
high-Q peaking inductor? What does it mean? What does Q stand for, and
high Q better or low Q better?
Post subject: Posted: Mon Aug 08, 2005 11:52 am
Joined: Mon Jun 27, 2005 2:02 pm
Q stands for Quality Factor. It defines
the ratio between the energy that is being lost on power dissipation
per cycle to the entire energy of the cycle. Another way to put it is:
Qul=Xl/R (Unloaded Quality Factor)
Xl - The
reactance of the inductor (2*pi*f*L)
R - The ohmic resistance of
the inductor's wire.
High Q is better since it means that there
is a lower resistive dissipation in the inductor. There are few ways
to achieve that like using air core or lower resistance materials for
Post subject: Posted: Mon Aug 08, 2005
Q (Quality factor) is the ratio of reactive power to resistive
power in a tuned circuit.