> is this just broadband hash >in my urban neighbourhood from er, broadband and wall warts etc? Yes, also known as frying bacon/eggs, atmospheric qrn, call it what you will.
The cure is a separate receiving antenna. For a fairly convincing demonstration of the Wellbrook 1530 loop in action on 160 listen to this http://www.wellbrook.uk.com/G0BDE/ Personally I have never found any NR implementation (from any manufacturer) to be very effective on audio signals and completely agree with Shaun's comment >one of the things with noise >reduction I've found is that it tends to detract some from the original >quality of the audio you're trying to weed out from all that noise as >well and in many cases, apply too much and everything's in the mud. >audio and all. What you really need is a method of identifying the actual ssb speech waveform, extracting the noise from it leaving the signal in the clear. There is a company in Germany that produces an outboard unit that I find very effective without the degradation in the audio. Audio demo here http://www.home.vrweb.de/michels/sound_demo.htm I use a pair of their DX-21 kit modules and feed the left/right stereo output into each one so I get independent NR control of each channel. There is an Eham review here http://www.eham.net/reviews/review/43017 By using a pair I also retain the audio fx and binaural I-Q. You would need to contact the company about the availability of the DX21 modules as I see they are no longer shown on the site. I find the combination of a receiving antenna (I use a rotatable 1530 loop) and the outboard noise reduction very effective on 80/160 grey line SSB weak signal work for instance. Anyway, something to think about. 73 to all Trevor G0KTN _______________________________________________ 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
