Roger G3XBM's (Mainly) Amateur Radio Blog

If you are like me, you turn to the internet if you want to calculate anything. Most sorts of calculators are there just waiting for your in...

This photo was sent to me by Steve G1KQH last night. It made me chuckle. The serious point is many very old people are unhappy with smart p...

In the next few days, I have to make a dipole for the 8m band on which I have special permission to TX for 12 months. At my QTH, the most su...

Every now and again, you need to work out something "radio" and a calculator can come in very handy. This site has some very usefu...

When designing a simple Sallen-Key active filter yesterday for my VLF receiver I found several useful web resources. One of the best is http...