LA3ZA Radio and Electronics

The adapters have been built from the drawings in chapter 26 of the ARRL handbook for radio amateurs, 2000, using the ARRL PCB templates....

The Pixie is a full break-in transceiver which is attractive for its simplicity, yet it performs well enough to be used for real contacts. T...

I use the K1EL K10+ chip as a morse trainer. The chip has more features built-in than I'll ever get use for. The keyer is built i...

This is a circuit that builds on KR5L’s zero-beat indicator circuit. He suggested trying a CMOS version of the 567 instead of the standard b...

I have built the N0SS wideband noise generator . The noise generator was built in a small metal box in combination with a 1 MHz marker gen...

Several K2 owners have had interference from broadcast images. This image band overlaps with the 19 m broadcast band as found by subtracti...