An uncommon catalog of original and useful
electrical-engineering programs
These programs have been designed to work on Windows® operating systems from Win XP up to and including Win 11. If
you find any routines or subroutines that do not operate properly please report that to Tonne Software.
Elsie
the Windows®
electrical filter design and analysis program handling all of the usual options (family,
topology, bandwidth, etc.). It has a very nice toolbox including real-time tuning modes, Monte Carlo, optimization and
much more! Printed outputs are presentation quality.
Meter
the Windows®
meterscale drawing program to allow you to design and print professional-quality meter scales on
your printer. Nice options include the ability to import a graphic (and resize and place it where you want), make a
modern-looking "flattened" scale, use seriff or sans-serif fonts of any size and specify the scale colors. And
lots more!
PIZZA
This Windows® program allows you to print both great-circle (polar) and rectangular projections of maps of the
world. Polar is as seen from a specified home location. Also shows the azimuth and distance to a specified target. Easy
to enter new home or target locations. Shows/uses Maidenhead strings.
SVC
a specialized Windows®
filter design and analysis program designed to expedite the design of lowpass and
highpass filters using
Standard
Value
Components (nearest-5% values).
OPTlowpass
a specialized Windows®
filter design and analysis program for the serious radio amateur to expedite the
design and analysis of optimized amateur-band transmitter output lowpass filters.
Helical
a Windows® program to help you
design and analyze helical-resonator bandpass filters, usually used in the VHF
and UHF frequency ranges.
PIEL
a Windows® program to allow you to
design and analyze PI-L matching networks.
Diplexer
a Windows® program to allow you to
design and analyze diplexer networks.
JJSmith
This Windows® program
replaces the classic paper version of the Smith Chart. The load end of a network can be
specified regarding the R and jX values, up to five elements from the component library can then be installed between the
load and the generator. Then going to the analysis page allows tuning or editing the network values to achieve a match,
in the usual manner. The complete system can be saved (and later recalled).
REVLOAD
Get the program which allows you to enter the values of an ordinary matching/network adjusted to match a reactive load to
a specified system impedance. It then returns the load's R and jX values. All eight of the usual two- and three-element
topologies are accommodated.
QuadNet
an interactive Windows® program to allow you to
design and analyze active allpass networks used for
single-sideband signal generation. Accepts orders from two to ten, specified operating frequency range and analysis
frequency range. Reveals sideband suppression, chain angles and angle differences. The program has a component-tuning
mode. Arbitrary components may be used, or nearest 1% or 5% values and results seen. Writes LTspice file.
ClassE
an interactive Windows® program to allow you to
design RF amplifiers using the single-ended Class E
topology.
Active Lowpass Designer
This Windows® program expedites the design and analysis of active
lowpass filters. Analysis of magnitude, phase and delay is
integral to the program. Interesting transient response and Monte Carlo gain plotting routines
as well as an optimizer based on entered limits.
Odd-order filters do not need a separate single-pole opamp. 3 OCT 2021
Active Bandpass Designer
This Windows® program expedites the design and analysis of active
bandpass filters. Analysis of magnitude, phase and delay is
integral to the program.
COLOR ADJUSTER
This Windows® program expedites the selection of colors used when
writing code for a graph for plotting data on your computer or setting the
colors on an LTspice waveform screen. Designed especially
for Visual Basic programmers and LTspice users. Uncommonly flexible and easy to use.
TOWER
This program allows you to see the values of R and jX looking into the base of a vertical antenna over an ideal ground.
Although the program is based on that ideal ground and a cylindrical metallic tower, it has proven very useful in the
real world. Inputs are the tower height and diameter and the analysis frequency range. Output is a plot of R, jX and Z as
a function of frequency. Log or linear sweep, output to a printer as well as screen.
BCMAPII
This hobbyist program allows you to plot the patterns of North American AM radio stations. Now a "freebie." No longer
updated but database is simple text so user can update it themselves.
TUBE CURVES
Download the tube curves program based on the Koren parameters. Writes LTspice files.
VOLUME CONTROL
Download the program to design stepped volume controls. The program also analyzes the resultant design.
This paper discusses the pulse-width modulator in great detail. Schematics
and waveforms from Elsie and LTspice analyses clarify the text. Related items are also
discussed. Be advised this document is over 9 megabytes in size.
27 AUG 2021
Download the article about Speech processing as submitted to QEX. Explains preamplification, response shaping,
simple but high-performance compression, and clipper with non-overshooting lowpass filtering.
Download the speech-processing article as published in QEX, Sep-Oct 2018 issue. This is courtesy ARRL and posting
here is allowed because I am the author.
Download the article about CW bandpass filters as submitted to QEX. Reveals why "rounded top" bandpass filters are
best for CW reception.
Download the article about CW bandpass filters as published in QEX, Mar-Apr 2017 issue. This is courtesy ARRL and
posting here is allowed because I am the author.
Download the article about Allpass Networks used in a speech chain as submitted to QEX. Passive and active
networks are discussed in detail.
Download the all-pass article as published in QEX, Nov-Dec 2017 issue. This is courtesy ARRL and posting here is
allowed because I am the author.
Download the talk about Speech Processing as given to the Oak Ridge Tennessee Amateur Radio Club.
Download the tutorial about electrical filters. This is the talk given to the Oak Ridge Tennessee Amateur Radio Club
about filters. Starts with the basics.
This is the paper on AM demodulators, with an emphasis on the diode type, pointing out the deficiencies
commonly encountered.
