[Elecraft] Low Voltage Band Data Output

[Jim Miller]

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 <wc2l at 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
wc2l at wc2l.com

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at 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 jim at jtmiller.com