The open collector outputs is F the K3 or K3s are lightly pulled up then fed thru a series resistor. Your decode must have adequate buffering in place to avoid drawing excessive current. A cmos buffer chip will do the trick.
73 Jim ab3cv (got the t shirt) On Jul 4, 2018, at 11:55 AM, William Liporace <w...@wc2l.com> wrote: Hi Folks, I thought it was me, but I guess not... When I hook up a cable to the ACC plug for band data output, I get about 4.8v (slightly less than 5v). When I hook up the radio to any antenna switch that has band data input, the voltage goes down to 3v. This is not enough to drive the antenna switches. This is a new KIO3B board, so is it a bad board? Is there something else not set right that I am missing?? I didn't anything in the manuals.. TNX Will WC2L -- William Liporace WC2L http://www.wc2l.com or http://dxc.wc2l.com AR-Cluster Node telnet dxc.wc2l.com or 144.93 MHz w...@wc2l.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to j...@jtmiller.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
