On Wed, 23 Jan 2008 12:06:39 -0800, Ron AC7AC wrote: > >You won't often need the full 6 KHz bandwidth to listen to AM sigs in SSB >mode unless you have a very critical 'ear'. Most conventional AM radios >today, especially car radios, roll off the audio bandpass at about 3 kHz, >just like the K3 using the 6 kHz roofing filter in AM mode. They do that to >reduce noise on marginal signals. Consumers have expressed a strong >preference for a narrower audio bandwidth and less noise on weak signals. > >Where the 6 KHz filter become critical is if you want to TRANSMIT in AM mode >with the K3. > >Ron AC7AC >
For AM MW/SW BC reception only, is there any reason to choose a 6 kHz filter over the 12(?) kHz FM filter (available in Feb)? 73, Drew AF2Z _______________________________________________ Elecraft mailing list Post to: [email protected] 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
