A visible note for outdoor antenna users: Use CMCCs! These Common-mode current choke are absolutely worth their money, especially with longer coax feed lines in receive mode. As an example here is a screen of the Solomon Islands on 5020 kHz at my Asia Beverage, to see and hear the signal from the Pacific Ocean only with S3/S5, but the noise floor below (!) – 140 dBm makes listening possible. I use CMCCs from remoteqth.com and Bonito.