Combining Multiple Features to Pull Out a Weak Signal While Battling QRM

In this video I show the techniques I used to chase QRP SSB SOTA activator AI7OV, while being bombarded with power line noise and another station causing interference from up the band.

Note the the VRF preselector I mention in this video is included inside the FTdx5000MP. The optional *mu-tuning preselectors are sold separately. There are 3, one for 160m, one for 80/60/40m, and one for 30/20m.

* These “variable preselectors” are high-Q factor (+300) filters that are inserted into the receiver signal chain between the attenuation stage and the bandpass filter stage. They narrow down the amount of RF spectrum allowed to continue to the bandpass filter stage to a mere few dozen kHz, by motor-driving a large 1.1” (28 mm) ferrite
core stack through a 2” high (50 mm) coil structure.

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73, de N4HNH

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