Bravo Bernie - again, GREAT comments! --
Best regards - Bry Carling, AF4K ---- Bernie Doran <qedconsulta...@embarqmail.com> wrote: > reading these comments about bandwidth suggests to me that there are more > than a few the believe under 3 kc bandwidth is fine for AM as it conserves > space. if so why does one even operate AM? why not use only ssb, psk or cw? > better yet do not operate at all, look at the space saved then!!! I thought > most operated AM because they like the quality of the audio produced. one > thing the SDR-Iq that I acquired a few months ago does rather well is show > the spectrum, on the local BC stations they seem to limit sharply at a > total 15 kc. I have watched the male voice spectrum and with the exception > of the S,F and C sounds nearly all is below 5 kc each side. narrowing to 3 > kc with below 300 cutoff turns those same voices into something that is not > really pleasant to listen too. I have noticed the same effect on a few that > are trying AM with a rice box that uses only 300 to about 3kc. the same > thing can be observed with the ESSB guys on the bottom of 80, they sound > much better, but still a little strange. > > again, this is good reason to operate down low on 80 where there is usually > plenty of room. if there are contests it might be best to simply avoid > operating, not only to give the contesters a band, but to simply avoid the > QRM created by others. However, there is so much racket no one would > notice if an AM station was 30 kc wide during the contests. > > RE the comments about power, the antenna is far above every thing else, > listen to what the strong stations are using, rarely does an out of the box > multiband antenna come in at the top of the heap. Dipole, open wire feeders > from a good antenna matching device (balanced link coupled) is the simplest > way to go with a multiband operation. The always perform well. the > comments about " use only the " necessary power and/or bandwidth" I believe > that to mean full quieting and the audio quality of a person sitting the > same room with me. It does not mean if I am on a particular freq for an hour > or so and someone decided to operate 1.5 kc away that it is my fault for > causing QRM to them. some of these comments sound similar to those I have > seen where it is believed that we are supposed to be on certain freq ( > channels) . At least there has been a lot of chatter on this topic. that > is good. 73 Bernie > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
