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K3 and KRC2 for controlling 12VDC

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Rich-4

K3 and KRC2 for controlling 12VDC

I have pretty much done an thorough search on this topic and have
concluded it cannot be done, but I thought I would throw it out here anyway.

I believe that the outputs on the KRC2 on strictly controlled by band
information which it receives. I was wondering if there was a way to
send RX antenna status to the KRC2 which would close an output to send
12VDC to my active RX antenna and another to activate 12VDC to the
preamp for the RX ant when I chose.

My thought was along the lines of the DVK messages which can be
activated via the keyboard when using Writelog or other contest
programs. I was hoping to send a command via the keyboard to activate
the RX ant on the K3 and at the same time send the required 12vdc to the
RX antenna via an output on the KRC2 and the same for the preamp if I
want it on/off.

I hope this is clearer than mud.

Rich
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Don Wilhelm-4

Re: K3 and KRC2 for controlling 12VDC

Rich,

If the RX antenna is the only thing you want to control with the KRC2,
the answer is easy - just use the KRC2 configurator application to
select the outputs for the bands you desire.
The High level outputs can provide the source of 12 volts (up to the
current limit of the drivers).

I am not sure what that has to do with the DVK messages - I do not see
how those can be related.

73,
Don W3FPR

On 7/6/2014 11:46 PM, Rich wrote:

> I have pretty much done an thorough search on this topic and have
> concluded it cannot be done, but I thought I would throw it out here
> anyway.
>
> I believe that the outputs on the KRC2 on strictly controlled by band
> information which it receives. I was wondering if there was a way to
> send RX antenna status to the KRC2 which would close an output to send
> 12VDC to my active RX antenna and another to activate 12VDC to the
> preamp for the RX ant when I chose.
>
> My thought was along the lines of the DVK messages which can be
> activated via the keyboard when using Writelog or other contest
> programs. I was hoping to send a command via the keyboard to activate
> the RX ant on the K3 and at the same time send the required 12vdc to
> the RX antenna via an output on the KRC2 and the same for the preamp
> if I want it on/off.
>
> I hope this is clearer than mud.
>
> Rich
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> Elecraft mailing list
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>

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Iain MacDonnell - N6ML-2

Re: K3 and KRC2 for controlling 12VDC

In reply to this post by Rich-4

On Sun, Jul 6, 2014 at 8:46 PM, Rich <[hidden email]> wrote:

> I have pretty much done an thorough search on this topic and have concluded
> it cannot be done, but I thought I would throw it out here anyway.
>
> I believe that the outputs on the KRC2 on strictly controlled by band
> information which it receives. I was wondering if there was a way to send
> RX antenna status to the KRC2 which would close an output to send 12VDC to
> my active RX antenna and another to activate 12VDC to the preamp for the RX
> ant when I chose.
>
> My thought was along the lines of the DVK messages which can be activated
> via the keyboard when using Writelog or other contest programs. I was
> hoping to send a command via the keyboard to activate the RX ant on the K3
> and at the same time send the required 12vdc to the RX antenna via an output
> on the KRC2 and the same for the preamp if I want it on/off.

Theoretically, the K3 could convey RX ANT status to the KRC2 over
AUXBUS, and the KRC2 could drive some outputs based on that, but
(AFAIK) that is not implemented in either firmware.

73,

~iain / N6ML
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Jack Brindle-2

Re: K3 and KRC2 for controlling 12VDC

In reply to this post by Rich-4

Rich;

Since you are talking about the K3, I believe your conclusion to be correct, but I would not (yet) rule it out. I don’t believe that the K3 outputs the RxAnt status on the Auxbus. Interestingly, the K2 _does_ output the Rxant status, and the KRC2 can respond to that inout, although it may require a bit of extra work on my part.

I will do some additional research on the code (it has been quite a while…) and let you know if what you want is doable with the K3.

Jack B, W6FB
Elecraft Engineering

On Jul 6, 2014, at 8:46 PM, Rich <[hidden email]> wrote:

> I have pretty much done an thorough search on this topic and have concluded it cannot be done, but I thought I would throw it out here anyway.
>
> I believe that the outputs on the KRC2 on strictly controlled by band information which it receives. I was wondering if there was a way to send RX antenna status to the KRC2 which would close an output to send 12VDC to my active RX antenna and another to activate 12VDC to the preamp for the RX ant when I chose.
>
> My thought was along the lines of the DVK messages which can be activated via the keyboard when using Writelog or other contest programs. I was hoping to send a command via the keyboard to activate the RX ant on the K3 and at the same time send the required 12vdc to the RX antenna via an output on the KRC2 and the same for the preamp if I want it on/off.
>
> I hope this is clearer than mud.
>
> Rich
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]