July 12, 2023 - A very active Wednesday morning on 40M CW. I think this is due to the Minitest 40 contest as usually 40M at mid morning is usually dead when it comes to receiving on my modified crystal radio. Note that I have added a CW filter that peaks at 700Hz but is still a bit broad but it does reduce the highs and lows nicely. I have a slight hum that I am working on. I need a good ground rod but can not buy one until next week, otherwise I am picking up power line hum through the various exposed wires in my lab ;-)