12/12/11

Home page for Kenneth
L. Nist

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**Free software written by KQ6QV**

**1. ****atlc2**** – Arbitrary
Transmission Line Calculator**

This program will figure out the
characteristic impedance of any transmission line. You submit a diagram of the cross-section of
the line. From that, the program uses
numerical methods to determine these transmission line parameters:

**Zo** characteristic impedance

**vf** velocity factor

**L** inductance
per meter

**C** capacitance
per meter

**Rs** series
resistance from the skin effect

**Vo** offset
voltage required for no radiation

You can use MS Paint or any similar pixel
editor to create the .BMP file diagram.
This program is similar to the original **atlc** program but is more capable
and easier to use. Run atlc2 on your
fastest computer.

Instructions for downloading
and using **atlc2**

**2. ****Transmission Lines by KQ6QV **version 12/12/11** **

**functions
for EXCEL and MATHCAD** EXCEL transmission line functions

Over the years I developed functions to solve
transmission line problems. There are
over 50 functions, configured for flexibility and easy use. I have recommended them to friends. But I used MATHCAD, and few people have
MATHCAD. EXCEL is the only program most
people have that will do serious math.
So I prepared an EXCEL version of the same functions. You may download either version. (MATHCAD comes with a library of electrical
engineering functions. But their
transmission line functions are not very helpful.)

Download MATHCAD
version now. (file:
TransmissionLines.mcd - 2.0 megabyte)

Same file
displayed as a web page (HTML) (file:
TransmissionLines.html. This printout of
the MATHCAD version is also the manual for the EXCEL version)

Download EXCEL
version now (file:
TransmissionLines.xls - 500 Kbyte.
This is the base Excel.
Transmission line projects are built by adding to it.)

Download EXCEL examples now (file: Examples.xls - 700
Kbyte. These examples were built using
the TransmissionLines.xls base.)

(These files may be executed directly upon
download. They do not have to be saved
to disk.)

**3. ****SIMDATA**

EZNEC will do a frequency
sweep, but its results go into a large, cumbersome file. SimData will
extract the most useful data from that file and place it into a new compact
file that can be loaded easily into Excel, Mathcad, or other analysis program.

Optionally, SimData
will draw graphs of gain versus frequency for one or more antennas, graphs
suitable for publication.

Instructions for
downloading and using SimData.

**4. ****Ken’s Weather Station**

This program will fetch the data from the
weather unit, display it at the computer, archive it, and optionally upload it
to CWOP (the Citizens Weather Observer Program run by NOAA). I wrote this program because I don’t like how
other programs display the data.

The
program is for the Oregon Scientific WM-918, (also known as the Radio Shack
WX200),

WMR-918,
WMR-928, WMR-968, and compatible units.

Instructions for
downloading and using Ken’s Weather Station.