LA3ZA Radio and Electronics

Propagation of wave energy to distance d, 2d, 3d  showing how the size of the surface that the energy spreads over increases in proportion t...

It is well known that the sunspots vary over an eleven-year cycle. As the sunspot number increases, the ionosphere is more ionized and radio...

My blog has suffered in recent years and here is the reason. For three years now I have been writing a book entitled "Waves with Powe...

“The starship hypothesis is a very interesting one, and the one which seems to be the most popular one on the internet,” said Sverre Holm,...

 Great circle path between Anchorage and Oslo Here's what a transpolar signal sounds like ( click here to listen ) and looks like (b...

This last month has seen some of the most fantastic conditions I have ever experienced. Especially the higher bands have given world wide c...

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...

My first beacon on 30 m, a free-running Ultimate QRSS kit (no GPS) has now been running for a full 24 hours using the Weak Signal Propaga...

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...

I just submitted data for all my radio contacts for 2011 to CQ DX Marathon . My log program is UcxLog by DL7UCX and I started by exporting ...

Field lines (black) and potential (red) for a dipole, static field.  In QEX July/August 2011 Robert K. Zimmerman (NP4B, VE3RKZ) had an ...