[Elecraft] Low Voltage Band Data Output

[Jack Brindle]

It won’t directly drive either. The K3/K3S outputs BCD band data. You need a decoder box to convert that into direct drive signals (high side drive) for both of the antenna switches.
The Elecraft KRC2 will do the job quite well, as will quite a few other boxes. Be sure they have TTL-level inputs. The ones with opto-isolators tend to require quite a bit of current, more than the K3/K3S may be able to drive.
Some will work, others, even from the same manufacturer will not. 

73,
Jack, W6FB


> On Jul 4, 2018, at 12:55 PM, William Liporace <wc2l at wc2l.com> wrote:
> 
> I really should have said antenna switch controller. I have two controllers.
> A) Is the DX Solutions SAS-6 (Smart Antenna Switch-6)
> B) The KK1L 2x6 Controller.
> Both devices worked flawlessly from the FTdx5000.
> 
> Will WC2L
> 
> On 7/4/2018 11:55 AM, William Liporace 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
> 
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