David, Agreed, the exception to the rule!
73 Rein W6SZ -----Original Message----- >From: David Little <dalit...@bellsouth.net> >Sent: Mar 9, 2010 2:21 PM >To: digitalradio@yahoogroups.com >Subject: RE: [digitalradio] Re: Question for experts > >One exception to that would be if it is part of a NASA rebroadcast > >IE: Wake-Up or Morning music on the Shuttle > >David >KD4NUE > > > > > >-----Original Message----- >From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] >On Behalf Of rein...@ix.netcom.com >Sent: Tuesday, March 09, 2010 5:15 PM >To: digitalradio@yahoogroups.com >Subject: Re: [digitalradio] Re: Question for experts > > > > > >Jose, > >Oversight, we are certainly not allowed to transmit Music! > >73 Rein W6SZ > >-----Original Message----- >>From: "José A. Amador" <ama...@electrica. ><mailto:amador%40electrica.cujae.edu.cu> cujae.edu.cu> >>Sent: Mar 9, 2010 1:26 PM >>To: digitalradio@ <mailto:digitalradio%40yahoogroups.com> >yahoogroups.com >>Cc: rein...@ix.netcom. <mailto:rein0zn%40ix.netcom.com> com >>Subject: Re: [digitalradio] Re: Question for experts >> >>El 09/03/2010 03:55 p.m., rein...@ix.netcom. ><mailto:rein0zn%40ix.netcom.com> com escribió: >>> Hello All, >>> >>> Suppose I would build an transmitter with a x-tal oscillator, lets >say >>> running at 7040.000 Hz >>> >>> Part of the system was a balanced modulator and just to make sure a >>> a high quality crystal filter, with a 1:1.05 shape factor, was added >>> in the driver stages for the final amplifier. >>> >>> With a lot of tweaking a carrier suppression of the balanced >>> modulator was reached of 67.3 dB and the balanced modulator >>> was kept temperature stabilized within .1 degree Fahrenheit. >>> >>> On the modulation section, I constructed a tone generator which could >>> be changed in steps of 7.3 Hz starting from 1354 Hz to all the way up >>> to 1646 Hz. >>> >>> I went out and got the xtal filter ordered for a lot of money. >>> >>> Center frequency of xtal filter ordered and delivered for 7041.500 Hz >>> filter at - 80 dB BW 500 Hz. >>> >>> My question is what would the modulation be of this transmitter? >>> >>> The amount of audio was set in such a way that the output of >>> the transmitter had no distortion what so ever totally >>> linear! >>> >>> 73 Rein W6SZ >>> >> >>All that trouble for MFSK ? :-) >> >>73, >> >>Jose, CO2JA >> >> >> >> >> >> >>------------------------------------ >> >>Try Hamspots, PSKreporter, and K3UK Sked Page >>http://www.obriensw <http://www.obriensweb.com/skedpskr4.html> >eb.com/skedpskr4.html >>Suggesting calling frequencies: Modes <500Hz 3583,7073,14073,18103, >21073,24923, 28123 . Wider modes e.g. Olivia 32/1000, ROS16, ALE: >14109.7088. >>Yahoo! Groups Links >> >> >> > > > > >
