The Discovery Crystal Radio
My project doing beta building of the big T41 SDT kit is still under way, but I am waiting on some parts. So, I thought this would be a good time to look at a new take on an old favorite. I think most hams my age started their kit building years ago with a simple crystal set. Crystal sets date back over 100 years to the earliest days of radio.
The principle that defines a crystal radio is its ability to receive AM signals using only the RF energy present in the air, without amplification or the need for a power supply. When we measure signal strength present at the
