LA3ZA Radio and Electronics

Below is a map showing contacts made from Pythagorio, Samos, early June 2022 using FT8. I tried to contact as many entities (~countries) as ...

The polymath Pythagoras was born on Samos and his birthplace village is now called Pythagorio. For a short while I’m operating from Samos, G...

My Elecraft K2  which I assembled as a kit in 2001, has mainly been a CW rig, but now I wanted to use it more for digital modes like FT8 als...

My Elecraft K2 which is now more than 11 years old (serial #2198) has served me well, even earning me QRP DXCC  (100 countries with 5 Wa...

The Elecraft K2 has an autodetect feature for the keyer input. When enabled, and when the DASH and the DOT lines are keyed at exactly the ...

In July 2011 Don Wilhelm, W3FPR, suggested that someone ought to write a comprehensive K2 Owner's Manual . This posting does not qualify...

The Elecraft K2 is quite a small transceiver, made for portable use. Therefore it has fewer indicators of status than many other transceiver...

I started by making a very simple modification for a low level audio output with level that was independent of the AF pot setting. T...

When I got my license in 2001, I discovered the Elecraft K2 transceiver on the internet and noticed the excellent reviews that it had rec...

I am beginning to realize that I will never be able to exceed 20-25 wpm CW speed. The speed pot of the K2 however covers from 9 - 50 wpm...

When the KPA100 power amplifier is external to the K2, the KPA100 loudspeaker is unused. I wanted to use it for other rigs that need a...

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...