They weren't only on digital modes like that. Plenty of "all knobs all the way to the right" operators on phone too. Of course that is nothing new on Field Day.
On Sun, Jun 26, 2022 at 3:08 PM Lance Collister, W7GJ <w...@bigskyspaces.com> wrote: > Hi Bob, > > I agree that there are a lot of improperly set up radios and improperly > set up > software programs on the bands! I operate mostly 6m and see that many > people think > that they can just connect the cables and start operating FT8 :-( FT8 is > most > certainly a very powerful innovation, and can lead to some amazing > contacts. However, > FT8 is NOT "Plug and Play"! > > Besides setting the audio levels properly for transmit, many users seem to > have no > idea about audio harmonics or why the WSJT-X developers took so much > effort to make > the program compatible with hundreds of different radios. This was not > done without > purpose! This feature enables those radios to automatically shift > frequency on > transmit, so the audio tones sent through the transmitter filter will not > be > generating harmonics throughout the entire (typically) 2800 Hz transmitter > filter > passband. An FT8 audio signal generated at 300 Hz will generate signals at > 300, 600, > 900, 1200, 1500, 1800, 2100, 2400 and 2700 Hz, and will become broader at > each > harmonic. It doesn't take a rocket scientist to see that is pretty easy to > completely > destroy the band by transmitting an FT8 signal using audio frequencies > below 1500 Hz! > > My suggestion to any newcomers to FT8 is the read the manual, and choose > the proper > settings from the FILE/SETTINGS/RADIO screen so the transmitter frequency > on your > particular radio will automatically shift as required when a different > "offset > frequency" on the waterfall is selected for transmit. > > If that cannot be understood or figured out, then the simple solution is > to ALWAYS > KEEP YOUR TRANSMITTED AUDIO TONES ABOVE 1500 HZ BY SELECTING A TRANSMITTER > OFFSET > ABOVE 1500 HZ! Simple as that. > > Please share this information with anyone you see clogging up the bandpass > with audio > harmonics. They probably are not aware of the problem and will be grateful > for the > insights on how they can prevent generating QRM. It is the responsibility > of everyone > to make sure that we educate everyone so the bands remain usable! > > GL and VY 73, Lance > > > On 6/26/2022 19:26:35, Bob McGraw wrote: > > ------------------------------------------------------------------------ > > > > I operated FD from here at the house this weekend. Most all of my FT-8 > > contacts were on 6M. > > > > I was appalled at the poor quality of many signals. Many show spurious > > every 1 kHz to 2 kHz either side of their primary signal. Several were > > noted to be bands of noise on the order of 2 kHz to 3 kHz wide. What > > gives with hams and their pride for good quality signals? Bottom > > line......this is poor operating and technical practice. Just because > > it was Field Day, that is no excuse either. Have the masses digressed > > to this level of non technical expertise? It sure seems so. > > > > Then I was off to 80M and 40M for a few FT-8 contacts. No different. > > WOW! This is all very disappointing. > > > > 73 > > Bob, K4TAX > > > -- > Lance Collister, W7GJ(ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, > 3D2LR, 5W0GJ, E6M, TX5K, KH8/W7GJ, V6M, T8GJ, VK9CGJ, VK9XGJ, C21GJ, CP1GJ, > S79GJ, TX7MB, TO7GJ) > P.O. Box 73 > Frenchtown, MT 59834-0073 > USA > TEL: (406) 626-5728 > QTH: DN27ub > URL: http://www.bigskyspaces.com/w7gj > Skype: lanceW7GJ > 2m DXCC #11 - 6m DXCC #815 - FFMA #7 > > Interested in 6m EME? Ask me about subscribing to the new Magic Band EME > email group, or just fill in the request box at the bottom of my web > page (above)! > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jimk...@gmail.com -- Jim K0XU j...@rhodesend.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
