K3 Band Decoder
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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" <[hidden email]> Subject: [Elecraft] K3 - Band Decoder To: [hidden email] Message-ID: <[hidden email]> 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: [hidden email] 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 |
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Also consider the Unified Microsystems BCD-10 at $18.95. You'll probably
need to add 4 pullup resistors. Dick, K6KR -----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of Ron Chambers Sent: Wednesday, April 09, 2008 12:30 PM To: [hidden email]; [hidden email] 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" <[hidden email]> Subject: [Elecraft] K3 - Band Decoder To: [hidden email] Message-ID: <[hidden email]> 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: [hidden email] 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 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by Ron Chambers
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
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