LA3ZA Radio and Electronics

Image: QRPGuys.com Some time ago QRPGuys approached me and asked if they could make the low-power zero-beat indicator that I made many y...

The Chinese Pixie transceiver operating at 7023 kHz has become very popular. It often costs less than 5 USD on Ebay. Like most Pixies it is ...

TX6G on the Austral Islands of French Polynesia is calling for EU stations on 14026 kHz CW. I hear him well at level S7, but the pile-up s...

The ultimatic mode is an alternative to the iambic mode for sending Morse code from a dual lever paddle. When pressing both paddles the last...

German, Swedish, Danish, Norwegian, Finnish, and some Spanish characters in the display are now supported by the K3NG Arduino Open Source Mo...

Photo @LA3ZA   Here's an adapter that emulates both a single-lever paddle mode and the  ultimatic mode. It is meant to go between a...

Nice drawing of Morse key by Dutch radio amateur  Dick Kraayveld, PA3ALM ( http://www.morsecode.nl/pa3alm.html ) In the early 90'...

I had the privilege of living in Paris with my wife a few years ago. At that time, 2008/2009, the series for car license plates had just com...

My single-lever PCB keyer. It may seem like a bad idea to downgrade from a dual-lever paddle and iambic keyer to a single-lever paddle....

Vintage  Ten-Tec Ultramatic Keyer KR50 . Nice name but the similarity to ultimatic seems to be coincidental. Iambic keying with a dua...

The Morse code for the 26 letters of the English language and the digits, you can find everywhere, e.g.  here on Wikipedia . All one-, two...

I haven't called CQ for a long time on CW except in contests. Mostly I have just responded to DX calls with a super short "5nn TU...

The Oseberg viking ship , 820 AD Not so many nationalities are included in the exclusive group of countries with their own Q-code. I mea...

I wasn't even born when this LA3ZA QSL-card was issued in 1949. This is because I am second generation LA3ZA after my father. When the...

Here's my map of confirmed US states as it has slowly been filling over the last 10 years. 41 states have been confirmed on CW on Logboo...

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 ...

IKEA Oleby automatic wardrobe light with passive infrared sensor upper right and four LEDs in the center. Passive Infrared (PIR) detect...

As a self appointed nerd I have a special fascination for watches with binary displays or with morse code readouts. It seems as if such wa...

The Japanese station JA3YBK was received in Oslo ( press here for audio ), 30. November 2003, 08:20 UTC on 21.004 MHz during the CQ Worl...

Northern Lights in Tromsø, Norway  Here is a recording of the Swedish station SM6CNN in contact with me on 29. October 2003, 22:42 UTC ...