There are few, if any, K3 radios running pre-2013 firmware that added FSK
waveshaping. The radio has always had AFSK filtering. Both types of K3 RTTY
transmission are among the cleanest signals on the bands.There's no excuse for
wide RTTY in modern DSP radios.73,Ed W0YK
-------- Original message --------From: Tim Shoppa <tshoppa@gmail.com> Date:
6/9/20 06:59 (GMT-08:00) To: CQ-Contest Reflector <cq-contest@contesting.com>
Subject: Re: [CQ-Contest] WPX CW Signal Quality Concerns Just a decade ago, CW
contest signals with extreme power supply ripple(causing large sidebands
+/-100, +/-300, +/-500 Hz but also out a longerways to kHz in worst cases) were
extremely common from Europe. Today theyare rare to nonexistent and I think the
efforts by contest organizers incalling out these bad signals played a big
part.I have nothing against cleaning up CW keyclicks - for sure I was
botheredby them several times in WPX CW weekend - but on the impact severity
scalethe RTTY Keyclicks made by JA rigs (or unupgraded K3's there may be some
ofthem still left) with FSK keying is way way worse than CW keyclicks.
Thesesame guys go around bragging about how they do FSK keying so they
haveperfect signals. W0YK's Contest University presentation is on-the-nose.Tim
N3QE_______________________________________________CQ-Contest mailing
listCQ-Contest@contesting.comhttp://lists.contesting.com/mailman/listinfo/cq-contest
_______________________________________________
CQ-Contest mailing list
CQ-Contest@contesting.com
http://lists.contesting.com/mailman/listinfo/cq-contest
|