K2 and ICE 419 filter

[Ted K8AQM]

Has anyone connected the ICE 419 filter box in the "automatic mode" with
their K2 and still used the db-9 for computer logging?  If so, how did
you do it?
73 es tnx

Ted K8AQM
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[Joe Subich, W4TV-4]

The ICE 419 requires one line per band control.  Neither the K2 nor K3
provide such an output.  Automating any of the bandpass filters with
K2/K3 require a band decoder of some kind - in the case of the K2 that
means decoding frequency/band from the CAT interface.

To my knowledge there are only two currently available band decoders
that will connect to the CAT interface of the K2 and still provide for
"pass through" of control data for a logging program - those being the
Elecraft KRC-2 and the microHAM Station Master.  The KRC-2 passively
"snoops" on responses from the K2 to the logging program, whilst the
Station Master provides an active (USB based) interface for the logger
using microHAM's Router software.

73,

    ... Joe, W4TV


On 7/22/2012 10:19 AM, Ted K8AQM wrote:

> Has anyone connected the ICE 419 filter box in the "automatic mode" with
> their K2 and still used the db-9 for computer logging?  If so, how did
> you do it?
> 73 es tnx
>
> Ted K8AQM
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>

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[Jim Brown-10]

On 7/22/2012 7:19 AM, Ted K8AQM wrote:
> Has anyone connected the ICE 419 filter box in the "automatic mode" with
> their K2 and still used the db-9 for computer logging?  If so, how did
> you do it?

I haven't done exactly that, but it can certainly be done with a home
brew cable that uses only pins 2, 3, and shield of the DB9 connector for
the serial connection, breaks out pin 4 from the computer to send CW and
pin 7 for PTT, and breaks out the Aux Bus to a KRC2.  I've done all of
that except the feed to the KRC2, which then controls the 419.  See the
manual for the KRC2 for details of wiring between the KRC2 and the K2.

All you need are some good quality DB9s that you can solder to (some
cheapies melt) and a suitable length of CAT5 or CAT6.

Note that the "official" serial cable for the K2 was NOT twisted pair,
which is a bad thing. Untwisted signal and control wiring is well known
to be susceptible to RF pickup, and it caused my computer to shut down
at power levels as low as 12W when using a long wire antenna ending in
the shack.  I solved the problem by replacing that original cable with
CAT5.

73, Jim K9YC



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