Vectronics VEC-820K - CW Audio filter -750 Hz

The VEC-820K Electronic Kit gives an incredibly narrow 80 Hz bandwidth and extremely steep skirts with no ringing for razor sharp selectivity. It will pull CW signals out of interference in any ham radio band. You simply plug the kit into your radio phone jack to drive phones or between audio stages for full speaker operation.

You can select four bandwidths: 80, 110, 180 Hz. Noise is down at least 60 dB one octave from center frequency for 80 Hz bandwidth. Center frequency is 750 Hz. The VEC-820K Kit reduces noise with up to 15 dB improvement in S/N ratio -- perfect for exotic low noise operation like moon bounce. The kits 8 poles active IC filtering uses low Q cascaded stages. Stops ringing.

No impedance matching needed. No insertion loss. The kit uses a 9 volt battery (not included). The kit measures 1¾ x 3½ x 3½ inches.