LA3ZA Radio and Electronics

Quad II Tube amplifier. ( Wikipedia Commons , user Harumphy) In the fall of 2000 The Audio Critic had an article listing the 10 biggest...

Medium Delayed Echoes or Magnetospherically Ducted Echoes (both MDE) are radio echoes delayed from 0.14-0.3 seconds. They represent a su...

4.5 metre high UK acoustic mirror used as early warning system during WW1. Not so relevant for Long Delayed Echos, but something which d...

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...

Earthrise from Apollo 8 ( NASA ) My blog has just been updated by migrating posts from my old web site containing a collection of audi...

Some records just have too much stereo separation. This makes them kind of artificial to listen to with earplugs or headphones as the soun...

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 ...

Last fall there was a competition at DangerousPrototypes with many interesting entries based on the 7400 logic gate family. The ancestr...