I have used a Signalink with my K3 with good results. I have cables (and
headers) for both the K3 and my Kenwood TS-870 and have used it with both
radios. However, when I added a SDR-IQ as a panadapter to the K3 I ran out of
USB ports on my laptop and went to a straight connection from the K3 Line
In/Out to the built-in sound card on the Lenovo T400 laptop. (I use a second
monitor for more screen real estate) Performance has been acceptable but I have
not done an A/B comparison with two instances of MMTTY running. The Signalink
might be better (or worse) but I can't say.
In the K3 I have the 400 Hz, 8-pole filter and usually use a 200 Hz DSP BW
without the dual peak turned on.
The Signalink is AFSK only and to use the better FSK filtering in my Kenwood, I
have built a prototype FSK decoder board that decodes the Signalink AFSK signal
to a digital signal for direct FSK transmit. I was well on the way to
committing this to a PC board that would install inside the Signalink case, but
my lovely wife passed away early last month and I've lost all interest in this
project (and a lot of other things).
In testing the FSK board I've used the K3 as the receiver and can say that the
K3 internal RTTY decoder is very poor compared to MMTTY using the laptop
soundcard.
Wes N7WS
--- On Wed, 2/23/11, r...@aol.com <r...@aol.com> wrote:
>
> Hi Guys,
>
> I really like the K-3 for RTTY. But I'm trying to
> maximize reception as
> during contests I often hear stations calling me that I
> can't copy. I
> believe the weakest link with my RTTY reception is
> the SoundCard in my current
> Desktop. I say this because I use a different
> Desktop while operating from
> my Midwest QTH and that computer seems to decode weak
> signals with the same
> K-3 a lot better. Funny thing is that the
> processor in that Desktop that
> decodes better is about 50% slower. So my question
> is: do you thinking
> replacing my current Desktop's SoundCard with a USB
> SignaLink would improve
> weak signal RTTY reception? Note: I have done
> various routines to calibrate
> the Desktop Sound Card with little improvement.
>
> Thanks & 73,
>
> Dick- K9OM
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