Folks - This thread was closed earlier today. Its well over the max posting limit,
Please take further correspondence off list. 73, Eric WA6HHQ List moderator --- www.elecraft.com On 11/21/2011 11:27 AM, Phil Kane wrote: > On 11/20/2011 8:45 PM, Don Wilhelm wrote: > >> down by 1.4 kHz. NOW, I can't resolve why everyone uses a downward >> shift of 1.5 kHz instead of a shift of 1.4 kHz - perhaps someone can >> explain that difference to me. I see nothing in the FCC documents that >> provides for a 100 Hz guard band which would increase the effective >> channel width to 3.0 kHz and thus yield a suppressed carrier shift of >> 1.5 kHz from the channel center. Mysteries, mysteries, mysteries - but >> that is the way we are told to do it, and the FCC has not complained so >> far - maybe just "let sleeping dogs lie" is the best recourse. > Enter stage left, the U S Coast Guard whose GMDSS (Marine > safety) SITOR (commercial version of AMTOR) transmissions say: > > NMC GMDSS SITOR FEC BROADCAST > > FREQUENCIES: 8416.5 KHZ > 16806.5 KHZ > > TIMES: 0015 AND 1735 UTC > > NOTE: CARRIER OR DIAL FREQUENCY IS LOCATED 1700 HZ BELOW THE > ASSIGNED FREQUENCY (-1.7 KHZ). > > On my (some say ancient) ICOM R-7000 HF receiver in FSK mode, > I set the dial 800 Hz below the assigned frequency. On my > TenTec RX 320D SDR HF receiver in LSB mode, I set the dial 2.19 > kHz above the assigned frequency. > > Mysteries indeed. > > My K2 doesn't tune those frequencies so I can't comment on > that, but I do like the idea of setting the first five memory > channels for USB/data/RTTY mode in VFO A and for CW mode in > VFO-B. Cheap and easy solution. > > -- 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
