Tired of noise? Noise that isn't the signal you want to copy? White noise, line noise, hiss? And off frequency stuff you don't want to hear? Do you want to modernize your old rig without spending thousands of dollars? The new SCAF-1 filter from Idiom Press makes your radio listener friendly, whether you are an SSB or CW operator.
Modern IF filtering design is the best ever. But the engineer still has to design an audio output that will accommodate the widest signal the radio is designed to copy. Typically, this is 6 kHz. for wide band AM or for FM. The audio passband must be capable of passing such signals through. The designers have accomplished this beautifully - and as a result, when using narrower band modes, off frequency QRM can be passed through with brilliant fidelity. Even if you don't want to hear it.