A standard practice in any business, school, government or relationship is to never respond to anonymous comments. Once you do they have control of you and you will never know where it is coming from, regardless of the topic. Anyone of integrity, character and courage will sign their name to such comments, others wise its invalid input and just meant to stir a quiet pot.....
All the Best Ron Weaver W6OM www.qsl.net/w6om -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Joe Crawford Sent: Friday, April 18, 2008 7:13 AM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Anonymous QST Author suggests that Part 97 requires6kHzAM Bandwidth Limit Don K4KYV hasn't been back on the forum, so I will say that he has a 3400 Hz filter in his audio chain that has a sharp cutoff right at 3400. He bought it from a surplus dealer in D.C. in the '70's for $5.00 or so. He commented on here that he wish he has bought all the guy had, because they are unobtainable now. Joe W4AAB ----- Original Message ----- From: "WB3AWJ" <[EMAIL PROTECTED]> To: "Discussion of AM Radio in the Amateur Service" <amradio@mailman.qth.net> Sent: Friday, April 18, 2008 7:06 AM Subject: Re: [AMRadio] Anonymous QST Author suggests that Part 97 requires6kHzAM Bandwidth Limit >I wonder if the writer of the original considered this "usual approach" of > 300-2.7 Kc most likely came about from the practice of using the same > filter to select the sideband in the exciter and defining the IF bandwidth > of the receiver. > > Rather than on any real spectrum efficiency considerations. > > As the the 30 Kc wide AM signals.... probably another case of the > relatively > poor design of the "modern" receiver. > I'll keep using my good old Collins receivers..... > > > WB3AWJ > Robert A. Poff > Loganville, PA. > > S/V Loon > 1983 Hunter 34 > Havre de Grace, MD > > "Lieutenant, target the offending power boat and launch photon torpedoes" > > ----- Original Message ----- > From: "rev. don" <[EMAIL PROTECTED]> >> > high frequency hearing". He goes on to allege that an AM signal > occupies >> > "a bit more spectrum" than two SSB signals, based on the notion that > there >> > is no need to transmit audio frequency components of the voice that >> > fall >> > below 300 Hz, and that the "usual approach" with SSB is to transmit >> > frequencies from 300 to 2700 Hz. > > ______________________________________________________________ > 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 > Help: http://mailman.qth.net/mmfaq.html > Post: mailto:AMRadio@mailman.qth.net > To unsubscribe, send an email to [EMAIL PROTECTED] with > the word unsubscribe in the message body. > ______________________________________________________________ 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 Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. ______________________________________________________________ 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 Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
