The poor man's solution is a CD4514 IC, some diodes and resistors. It will decode all 11 bands and run off the K3 +12v jack. Diodes allow for handling multiband antennas.
Personally, I prefer a cheap PIC but you have to have the programmer. 73 de Brian/K3KO Ron Chambers wrote: > > 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" <[EMAIL PROTECTED]> > Subject: [Elecraft] K3 - Band Decoder > To: [email protected] > Message-ID: <[EMAIL PROTECTED]> > 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 > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://www.nabble.com/K3-Band-Decoder-tp16594829p16596454.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
