Build a Wspr lite classic low pass filter assembly

As you will know from other posts, I have recently purchased the Sotabeams WSPR Lite classic low power antenna testing unit. This unit, in its its bare back form allows testing on the 20mtr and 30mtr bands without filters, however if you wish to explore antenna usage on 40, 80 & 160mtrs you will need … Read more Build a Wspr lite classic low pass filter assembly