[Elecraft] K3 Auto antenna switching

[Guy Olinger K2AV]

You speaking of digout0 or digout1?

On Thu, Aug 25, 2011 at 2:10 PM, Joe Subich, W4TV <lists at subich.com> wrote:

>
> The only "official" use right now is for turning the PR-6 on/off on
> six meters.
>
> 73,
>
>   ... Joe, W4TV
>
>
>
> On 8/25/2011 2:02 PM, Guy Olinger K2AV wrote:
>
>> Joe&  Fred,
>>
>> Hmm, I was somehow under the impression that was "needed for something",
>> but
>> reading it all again from scratch, that is the digout0 which apparently
>> only
>> works in relation to some transverter function.  Thanks all for the info.
>>  73, Guy.
>>
>> On Thu, Aug 25, 2011 at 10:57 AM, Cady, Fred<fcady at ece.montana.edu>
>>  wrote:
>>
>>  Hi Guy and all,
>>> You could "kind of" do this with the DIGOUT1 signal from the ACC
>>> connector.
>>> It can be programmed OFF (floating, open-drain output, you need a pull up
>>> if
>>> you want a high) or ON (pulled down to ground).
>>> The Elecraft Owner's manual describes it on page 55 and here is what the
>>> KE7X K3 book says:
>>> (Figure 7 16.) This output signal is a general-purpose, open-drain output
>>> that may be programmed (OFF = floating, ON = pulled down to ground) on a
>>> per-band and a per-antenna basis (if the KAT3 ATU is installed). For
>>> example, you might use this feature to turn on the PR6 six meter preamp
>>> only
>>> when the six meter band and the six meter antenna are selected. To
>>> program
>>> DIGOUT1, tune the K3 Main receiver to the desired band with the selected
>>> antenna and go to CONFIG:DIGOUT1 and set it to ON. The maximum sinking
>>> current is 250 mA and the maximum load voltage is 25 VDC.
>>>
>>> So, "kind of" means you could program DIGOUT1 to be ON (pulled low) when
>>> you are on 80 and have ANT2 (for example) selected. For any other
>>> combination of band/ant DIGOUT1 would be floating (or pulled up). This
>>> would
>>> work if you are using an external band decoder to select antennas and you
>>> simply want to activate another switch or relay to switch in one of two
>>> 80
>>> meter antennas.
>>>
>>> Cheers and 73,
>>> Fred KE7X
>>>
>>>
>>> Fred Cady
>>> fcady at ieee dot org
>>> "The Elecraft K3: Design, Configuration, and Operation"
>>> www.ke7x.com
>>>
>>>  -----Original Message-----
>>>> From: elecraft-bounces at mailman.qth.**net<elecraft-bounces at mailman.qth.net>[mailto:
>>>> elecraft-
>>>> bounces at mailman.qth.net] On Behalf Of Guy Olinger K2AV
>>>> Sent: Thursday, August 25, 2011 2:05 AM
>>>> To: Oliver Dröse
>>>> Cc: elecraft at mailman.qth.net; DBellW6AQ at aol.com; K6YR at aol.com
>>>> Subject: Re: [Elecraft] K3 Auto antenna switching
>>>>
>>>> I would really like an external signal that tells whether ANT1 or ANT2
>>>> is
>>>> selected.  Any way to do that?  73, Guy
>>>>
>>>> On Wed, Aug 24, 2011 at 7:28 PM, Oliver Dröse<droese at necg.de>  wrote:
>>>>
>>>>  Hi Dave,
>>>>>
>>>>> unfortunately not, it's just one BCD code per band.
>>>>>
>>>>> 73, Olli - DH8BQA
>>>>>
>>>>>
>>>>>
>>>>> ----- Original Message -----
>>>>> From:<DBellW6AQ at aol.com>
>>>>> To:<elecraft at mailman.qth.net>
>>>>> Cc:<K6YR at aol.com>
>>>>> Sent: Wednesday, August 24, 2011 8:29 PM
>>>>> Subject: [Elecraft] K3 Auto antenna switching
>>>>>
>>>>>
>>>>>  I have two 80 meter  antennas.  Is it possible to program the band
>>>>>>
>>>>> data
>>>>
>>>>> output on the K3 for 80  meters # 1 and # 2?  I couldn't find an
>>>>>>
>>>>> answer
>>>>
>>>>> to
>>>>>
>>>>>> this
>>>>>> in the  manual.
>>>>>>
>>>>>> 73,  Dave
>>>>>>
>>>>>
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