On 2005-08-02, Tom Ring wrote:

In my current business 7 nines would mean roughly 3.16 seconds. Can you
tell me why?

That's how much downtime you get each year if you have 99.9999% uptime.
Of course that's *unplanned* downtime. ;-)

--
Ben Jackson

http://www.ben.com/

one more "9" My calculator says that 3.16 sec per year (365.25 days) is an
up percent of 99.99990

73 Mac N8TT - back from Perry

--
J. Mc Laughlin; Michigan U.S.A.
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"Ben Jackson" wrote in message
...
On 2005-08-02, Tom Ring wrote:

In my current business 7 nines would mean roughly 3.16 seconds. Can you
tell me why?

That's how much downtime you get each year if you have 99.9999% uptime.
Of course that's *unplanned* downtime. ;-)

--
Ben Jackson

http://www.ben.com/

KJ4UO asked:

If I tune my SWR for 1:1 and go back and measure each value of the
capacitors and inductor, is there a equation or computer program I can
use these measured values to obtain my complex impedance at the input
of the coax cable?

Jim Tonne, WB6BLD, wrote a program in Visual Basic that does
precisely that for all common tuner configurations. It is
called Revload and can be downloaded for free from:

http://www.tonnesoftware.com/revload.html

You may want to check out his other ham-radio related programs,
listed on his main page:

http://www.tonnesoftware.com/

As others have pointed out, this is not a particularly accurate
way of measuring impedance, but it should be adequate for "ballpark"
estimates.

Jim, K7JEB