Dave - I experience the same issue and Elecraft indicated that the FSK mark/space power fluctuations are caused by the transmit filter's passband ripple and where the transmit signal falls within the filter's passband. I'm using the standard 5 pole 2.7khz filter. They indicated the 8 pole filter should be flatter.
73 Phil NA4M Dave Hachadorian wrote: > > I'm getting my K3's set up for the CQWW DX RTTY, and notice > that there is a significant variation in power output > whenever the FSK goes from mark to space or space to mark. > One of these K3's is driving a high gain tetrode amp, and > the amp's screen current is jumping all over the place. The > power transient is only at the time of transition. The > steady-state power of the mark and space are equal. > > I've complained about this before, but it seems to be even > worse now. I'm using FW rev 3.30. > > This amplitude modulation has got to be producing some > illegal sidebands. > > Dave Hachadorian, K6LL > Yuma, AZ > > > > > > > > > > > > > > > > > > > > > > > > . > > ______________________________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3-FSK-power-transients-tp3712691p3716185.html Sent from the [K3] mailing list archive at Nabble.com. ______________________________________________________________ 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
