Noise blankers "punch holes" in the signal by turning the I.F. amplifier On and Off. Hopefully it's off during the noise pulses.
That works really great for killing noise pulses when they are regular enough for the system to anticipate when the pulses occur. However, turning the I.F. amplifier On and Off like that makes it a pretty dandy "frequency mixer" too! That means that many strange artifacts can show up in the receiver passband as various strong signals - sometimes signals way off frequency - mix together in the I.F. amplifier. That's likely what you are hearing. And it's why Elecraft recommends having the noise blanker On only when it's really needed. Ron AC7AC -----Original Message----- Group, Had a question about the opperation of the noise blanker in the k1. When turned on 'low' it almost sounds like an am radio station in the background noise. Do not notice this on 'high' or when the noise blanker is off. K1 #382 ,2 band, auto tuner Dwight N4GSD _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
