Finally found a good mounting box to finish assembling the SDR receiver today.🙂    I’ll be away on work for a while so will be leaving it configured for 24/7 reception on the 160m band.  One of my colleagues may try to ping off it in the interim🧐 I left some room internally so I…

Summary The main issue recently has been achieving a low-impedance ground, so that the ‘standing wave’ cavity is formed between the top of the Tesla transformer and Earth, rather than being formed between the top and bottom of the Tesla transformer. When an impedance-matching transformer is used to drive an Extra coil, the system impedance…