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> Mfj cw filter - great selectivity
Mfj cw filter - great selectivity
MFJ CW Filter - Used but works well with fairly new 9 v. battery.
Selectivity ranges: OUT (None), 180, 110, 80
The photographs with scope (not included) shows how well it works.
It was hooked up to a shortwave receiver with low selectivity. With no filtering the CW signal can be slightly heard above the background noise. This unit will remove the noise as the scope shows (some scope shoots are not the best since I used a point-and-shoot camera).
You can practice CW without and expensive rig or filter digital signals to your computer.
