[Elecraft] Elecraft KX3 Owner's Manual now available (*preliminary*)

[Wayne Burdick]

We could provide the equivalent of RTS using the GPIO pin of the ACC2  
jack. You'd have to split the signal out from the RS232 cable.

Wayne


On Mar 5, 2012, at 9:43 AM, Lance Collister, W7GJ wrote:

> Hi Don,
>
> MNI TNX.  That is what I was afraid of.  I have been requesting the  
> WJST option to be
> able to turn the XMTR on and off with TXD and RXD line commands for  
> years, but I
> guess it just has not risen high enough on the list :-(  This is the  
> first time that
> it is actually ME who needs it though - in the past it is all the  
> ICOM users who
> would benefit from having that option available.
>
> Looks like I will have to get a second USB cable for the KX3, and  
> build some sort of
> interface that will plug into the KX3's custom mic jack to trigger  
> the PTT.
>
> VY 73, Lance
>
> On 3/5/2012 5:15 PM, Don Wilhelm wrote:
>> Lance,
>>
>> There are only 2 conductors in the ACC1 jack, so no RTS input -  
>> only TXD and RXD.
>> Your application will have to put the KX3 into transmit via the TX  
>> command (HRD can
>> do that, I don't know about others), then use RX to get back to  
>> receive.
>>
>> You can build the "one transistor keying circuit" that is published  
>> in so many of the
>> digital application help files and use that output to drive PTT.  
>> Unfortunately, that
>> solution rules out using the KXUSB cable - you would need to use a  
>> USB to serial
>> adapter or a real serial port to have the RTS (or DTR) signal  
>> available.
>>
>> 73,
>> Don W3FPR
>>
>> On 3/5/2012 11:51 AM, W7GJ, Lance wrote:
>>> Anybody know if the KX3 can be set into XMIT mode via the RTS  
>>> serial line from the
>>> computer going into ACC1? I looked in the manual, but I could not  
>>> find it. I know
>>> many people with barefoot rigs or modern QSK amplifiers don't care  
>>> if they are
>>> running digital modes in VOX mode, but all my amplifiers use  
>>> mechanical relays and
>>> when I run WSJT modes (such as FSK441 and JT65), I need to take  
>>> advantage of the
>>> built-in delay afforded through that software to turn on  
>>> everything to XMIT well
>>> BEFORE the tones are started.
>>>
>>> If there is no way to do this with the ACC1 jack, it appears I  
>>> will have to build a
>>> separate transistor switch to interface with my USB to Serial port  
>>> converter cable so
>>> I can turn on the PTT somewhere else....possibly via a special Mic  
>>> connector or
>>> something. Just more stuff to haul around on DXpeditions....
>>>
>>> Any guidance would be appreciated! MNI TNX and VY 73, Lance
>>>
>>
>
>
> -- 
> Lance Collister, W7GJ
> (ex WA3GPL, WA1JXN, WA1JXN/C6A, ZF2OC/ZF8, E51SIX, 3D2LR, 5W0GJ)
> P.O. Box 73
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