Reg Edwards wrote:
But searching is a pleasant pastime, is it not?

I was at work (GED teacher) the other day and wanted to
gin up an Excel program for converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did. That search was not
pleasant. 99.9% of series to parallel stuff on the web
is digital.
--
73, Cecil http://www.qsl.net/w5dxp


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On Tue, 12 Apr 2005 10:38:53 -0500, Cecil Moore
wrote:

converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did.

Google: converting series impedances
second response points at:
http://www.cebik.com/trans/zcalc.html

2 minutes tops

Richard Clark wrote:
Google: converting series impedances
second response points at:
http://www.cebik.com/trans/zcalc.html

2 minutes tops

The firewall at the GED office doesn't allow access
to Google. I was using the Netscape search engine
searching for "series to parallel impedance conversion"
which yielded http://www.cebik.com/gup/gup23.html. Those
equations are NOT on that page.
--
73, Cecil http://www.qsl.net/w5dxp


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On Tue, 12 Apr 2005 13:29:10 -0500, Cecil Moore
wrote:
The firewall at the GED office doesn't allow access to Google.
Google Education Deficient?

Richard Clark wrote:
Cecil Moore wrote:
The firewall at the GED office doesn't allow access to Google.

Google Education Deficient?

They don't want the students reading alt.sex.kinky
--
73, Cecil http://www.qsl.net/w5dxp


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That ALWAYS worked for me... if the adults ever put anything out of my
reach--I just did without it! sly-grin

Regards,
John

"Cecil Moore" wrote in message
...
Richard Clark wrote:
Cecil Moore wrote:
The firewall at the GED office doesn't allow access to Google.

Google Education Deficient?

They don't want the students reading alt.sex.kinky
--
73, Cecil http://www.qsl.net/w5dxp


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News==----
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Newsgroups
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In article , Cecil Moore wrote:

I was at work (GED teacher) the other day and wanted to
gin up an Excel program for converting series impedances
to parallel impedances and vice versa. I wanted to verify
my memory on those equations. I spent two hours trying to
find them on the web and never did. That search was not
pleasant. 99.9% of series to parallel stuff on the web
is digital.

The easiest way I found to figure this out, is to start from the
basic Ohm's Law formula for two impedances in parallel:

Zt = (Z1)(Z2) / (Z1 + Z2)

Let Z1 be a purely real impedance (Rp + j0) and Z2 be a purely
imaginary impedance (0 + jXp) and calculate from there.

It was a fun bit of scratchpad-and-pencil-in-the-afternoon to start at
Ohm's Law, and end up with a pretty decent understanding of how L- and
T-match antenna tuners (transmatches for the purist) actually do what
they do.

--
Dave Platt AE6EO
Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!