[Elecraft] K3 Band Decoder

[Dick Dievendorff]

Also consider the Unified Microsystems BCD-10 at $18.95.  You'll probably
need to add 4 pullup resistors.

Dick, K6KR


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ron Chambers
Sent: Wednesday, April 09, 2008 12:30 PM
To: elecraft at mailman.qth.net; kd6kml at sbcglobal.net
Subject: [Elecraft] K3 Band Decoder

Buy a Phidget 16/16 board ($100), write a little Visual Basic 6 code,
input the K3's band data to the Phidget Board, and "bingo", out comes
whatever switching logic you need on any or all of the 16
outputs!....(slightly oversimplified of course...)
Ron N5QQ

Message: 39
Date: Tue, 8 Apr 2008 16:04:08 -0700 (PDT)
From: "J. Heide" <kd6kml at sbcglobal.net>
Subject: [Elecraft] K3 - Band Decoder
To: Elecraft at mailman.qth.net
Message-ID: <510420.99376.qm at web80707.mail.mud.yahoo.com>
Content-Type: text/plain; charset=us-ascii


OK, now that the Katiegram has arrived, I need to think about antenna
switching. I have the following antennas that I want to use with the
K3
Windom for most all bands
Yagi for 20 meters
Yagi for 6 meters (goes to the XV50)
Vertical for 160 meters
Vertical for 6m FM (which is not used with the K2)

Right now, I have a KRC2 that switches the 20m yagi and 160 vertical
on antenna port 2 on the radio. Since the K3 has 4 band decoder (TTL?)
lines coming out of it, it is easy enough to build logic to pull in
the right relay. Can the "DIGOUT" line be used (with proper buffering,
of course) to switch a relay for changing from horizontal to vertical
on 6m? Basically, windom and 6 meter antennas to antenna port 1 (with
the band decoder switching from windom to 6 meters, and digout
selecting wither the vert or horiz) and the 20m beam and 160 vert
switched on antenna port 2?

I have several RelComm RDL-SR002 relays, one of which I am using with
the KRC2 now, so quality relays are not a problem here.

Sorry if this is a bit long, but without equipment in front of me, I
have a hard time visualizing things.

73
Josh
K6ZRX
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