LA3ZA Radio and Electronics

I visited Riga, Latvia with a youth group which we as a family were involved with in 1992, and there I stumbled upon a Soviet oscilloscope...

In 2012 bulky power transformers that work directly from the power grid at 50/60 Hz have mostly disappeared. My objective here is to moder...

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...

A vertical wire antenna based on a MFJ-1904H 6.7 m (22 feet) telescopic fiberglass pole as shown here is easily tuneable for all bands fr...

I first encountered this generation of Tektronix oscilloscopes in my first job at the Electronics Lab of SINTEF , Trondheim, Norway in 197...

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...