TenTec 1056 receiver with LogiKit SCAF filter

Demonstration of LogiKit SCAF-1 Audio Filter kit improving selectivity of Ten Tec Module board T1056 40m receiver. The T1056 has a fairly good bandpass filter already, but the outboard Switched Capacitor Audio low pass Filter cleans up the unwanted higher frequency audio and results in CW signals with reduced QRM (interference) and QRN (noise). Filter has adjustable low pass cut-off frequency between 3500 and 450 Hz and is shown removing adjacent channel CW and SSB QRM. Annotations added for Morse code practice.