> I've heard it said that some contest stations deliberately transmit a > wider-than-necessary signal to keep competitiors away from "their" channel.
David G3UNA > > > > Within the context of SSB useage in ham radio I believe that the 'hype about > audio' could lead to another related problem, if not already existing, which > is poor use of the HF spectrum available to us. Given the proven fact that a > SSB transmitter filter bandwidth of 2.1 kHz will result in the transmission > of a very 'good quality' speech signal, provided that the carrier is > positioned properly and that the mic - audio - modulator system > characteristics suit human speech, I see no valid reason for using wider SSB > filters. In addition to the increased amount of spectrum used, the use of > wider filters followed by linear amplifiers whose IMD products might be only > 30db or so below a test tone obviously results in a wider 'Interference > Bandwidth', and should be discouraged IMHO. Adding Reverse ALC to the mix > can further increase interference. > > Just an opinion. > > 73, > Geoff > GM4ESD > ----------------------------------------- Email sent from www.virginmedia.com/email Virus-checked using McAfee(R) Software and scanned for spam _______________________________________________ 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
