LA3ZA Radio and Electronics

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...