Re: Elecraft KX3 Owner's Manual now available (*preliminary*)
Posted by
Don Wilhelm-4 on
Mar 05, 2012; 7:13pm
URL: http://elecraft.85.s1.nabble.com/Elecraft-KX3-Owner-s-Manual-now-available-preliminary-tp7343177p7346041.html
Lance,
You should not need another USB cable, but use the KXSER cable (and a
USB to serial adapter if needed) which will give you access to the RTS
and DTR pins of the serial port.
Yes, you will have to add the wires to the existing KXSER cable.
73,
Don W3FPR
On 3/5/2012 12:43 PM, 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
>>>
>
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