My 'on the air' name is Tom and these pages are dedicated to amateur radio.
Morse Code Training
shows a way of improving Morse Code proficiency at speeds above 25 wpm.
Morse Code Circuits presents some circuits related to Morse Code signals.
The regenerative Code Practice Oscillator sineCW30 provides a configurable, high-quality, Morse Code monitor tone.
Chuck, AA0HW, started the "sineCW" project in 2014 and is the main contributor. He provides several versions of "sineCW..." as a VSTi (Virtual Instrument) plugin. The plugin is made by first configuring several standard modules (oscillator, filter, controls etc.) in the program SynthEdit by Jeff McClintock and then exporting the circuit as a plugin. The plugin can be applied in a VST (Virtual Studio Technology) host. In 2024, I have refined one of Chuck's designs and called it sineCW30. It is a 32-bit (VST2) plugin. To create a tone at the output of the VST host's sound card, feed a keyed square wave signal (frequency about 4 kHz to 10 kHz, level about 2 V peak-to-peak) to its "Line-In" input.
Links for additional information:
iCW Group at groups.google.com
QRQcwnet
A collection of links to Semiconductor Data Sheets may be useful for modifications of kits or for homemade projects.
An RF Bias-Tee has been designed and built for a local club station. It includes a cascade of four inductors (L1 to L4), optimized to result in a high-impedance broadband choke (1 to 150 MHz).
For a while, I have been experimenting with the K3NG Arduino CW Keyer. This keyer includes the option to set the keyer speed by a rotary encoder. In the original code, you may choose between "Full-Step" and "Half-Step" transition tables for the encoder. I have written additional code for a "Quarter-Step" state transition table. It is published as Quarter-Step_State_Transition_Table_for_Standard_Quadrature_2-Bit_Gray_Code_Rotary_Encoders.pdf. This code seems to support my rotary encoder (Grayhill 61C11-01-08-02) in a better way.
Wes Hayward, W7ZOI described (QST Magazine, June 2001) an RF power meter based on the AD8307 Logarithmic Amplifier and inspired me to build my PM8307.
Frank M Doerenberg, N4SPP provides in-depth information and extensive references on the Multi Band End-Fed Antenna[2]. His publication helped a lot during the design and construction of a 160 meter band Sloping End-Fed Half-Wave (EFHW) Receiving Antenna at a local club station.
Dan Tayloe, N7VE has been so kind to send me a revised presentation of his NC2030 CW-transceiver[3] using the Tayloe Detector.