Radio Downloads

This document is still evolving, I'll add to it as problems or suggestions appear. Keep checking periodically. Last upload 18 April 2005, with a minor text revision.

Morse teaching software, DOS version 7.1.

HTML Help files for DOS Morse teaching software version 7.1.

Morse proficiency testing software, zipped. Preliminary version.

Modified Teach with high-speed range from 24 to 80 wpm, zipped. Contains one exe file and new help file. Unzip into folder where Teach31 is installed.

1917 Victor recording of Morse, possibly spark Discusssed in March/April "Morseman" column.

Version 3 of "PlotSpec". Download, install, run. Read the help file.

"QSOMake". Windows-version Random QSO generator, version 2. Download into new folder, run. Read the help file.

Morse Doktor, version 1.35. Download into new folder, Unzip. run "Doktor.exe". Read the help file.

Installation of NZARTX07 examination generator. This version incorporates the 2006 regulation changes. Do NOT use it to deliver exams until officially notified!

Bruene power meter and SWR. This is an expanded treatment of material presented in Break-In, September/October, 2006.

Notch Filter expanded. This is an expanded treatment of the notch filter presented in Break-In, November/December, 2006.

Nick, WA5BDU's introduction to LTspice . A simple introduction to modelling with Winspice, as mentioned in the Morseman column, October 2007.

Teach with Fast Farnsworth. for Cliff,. ZL1RP

Triangle to sinewave LTSpice source code. as mentioned in the Morseman column, October 2007. Save this file, then change the extension from "bin" to "asc".

THD and capacitors. THD Equation derivation and proof of the capacitor change, as mentioned in Morseman column, December 2007.

Total Harmonic Distortion calculator. Spreadsheet calculator for total harmonic distortion, as described in Morseman column, December 2007.

Background derivations for November/December 07 Morseman column. The infinite resistor chain. Amazing stuff!.

Expanded solution to January/February Morseman column problem. Solution of the "Simple amplifier" problem.

Expanded solution to March/April Morseman column problem. Solution of the resistive load matching problem.

Colpitts Crystal oscillator. Expanded treatment of operation of a crystal oscillator derived from the Colpitts circuit.

Lossy matching problem. Expanded solution of problem set in May/June 2008 Morseman column.

Class B amplifiers. Derivation of the efficiency of class B amplifiers, as mentioned in the September/October "Morseman" column.

Class B with 5 pole rf filter. Simulation of the class B push-pull amplifier, as mentioned in the September/October "Morseman" column. Change the extension from "txt" to "asc" to run it under LTspice.

July/August "Morseman" problem. Solution of the "equal reactance" transmatch problem.

September/October "Morseman" problem. Maximum inductance for a given wire length.

January/February 09 "Morseman" problem. Where did the energy go?

May/June 09 "Morseman": ZL1AI's experiment. A variable capcitor loses and gains energy.

May/June 09 "Morseman": Calculations and explanations.

May/June 09 "Morseman", cube resistance problem: Single page showing solution steps.

Wooden key.pdf Construction of Villi's Wooden key.

July-August problem.pdf Expanded solution to the problem set in last month's column.