On Jan 27, 2013, at 4:17 PM, "Dave Hachadorian" <k6ll@arrl.net> wrote:
>
> I am also considering going to AFSK, just to get rid of the K3's whacky power
> transients on FSK. I am tired of seeing amplifier screen current jump all
> over the place. It makes me nervous.
I was under the impression the K3's power fluctuations when transmitting FSK
were mainly the result of the standard 2.7 kHz 5 pole roofing filter's
considerable passband rolloff.
The optional 8 pole 2.8 kHz filter is much flatter. KE7X's latest K3 book has
a comparison of the two filters on page 13 where the difference is obvious.
73 Phil NA4M
-. .- ….- --
Phil Duff
Georgetown, TX
http://priceless.apduff.com
http://stockphoto.apduff.com
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