LA3ZA Radio and Electronics

Examples of a speech signal (top), a sinusoidal, and noise (bottom) Radio amateurs have been using adaptive noise reduction and adaptive not...

Fav 2 subset with 11 entries (Example in text has 9) The Clock subset menu of the  Multi-face GPS Clock  gives you a choice already between:...

My QMX+ has some minor mechanical improvements: Slimmer knobs. I decided to replace the knobs as I often touched the bottom one while adjust...

Example of a speech signal which transitions from an unvoiced to a voiced sound Digital VHF and UHF communications is increasingly popular a...

Weekly progress bar with Monday as day 1 in week 9 and yearly progress bar as of day 56 in the year. Among the 50 different faces (or screen...

I got an unassembled QMX+ for Christmas this year, and here are pictures of it coming together. First the winding of toroids for the low-pas...

Propagation of wave energy to distance d, 2d, 3d  showing how the size of the surface that the energy spreads over increases in proportion t...

Envelope Elimination and Restoration, from Kahn 1952  There is a method for SSB generation which is now becoming popular with digital signal...