[Elecraft] [K3] splitting RS232 output for 2 serial ports

[Don Wilhelm]

John,

I am talking about the PTT IN and the KEY jacks on the back of the K3 - 
not KEYOUT - that is an output, you are looking for inputs to the K3.

73,
Don W3FPR

On 8/7/2012 6:27 PM, John Shadle wrote:
> Thanks, Don. Are you talking about the "PTT IN" and "KEY OUT" RCA jacks?
>
> I Googled "one transistor keying circuit" and it came back with some
> amplifier keying circuits. Is that what I should be looking for, or
> something else? I'm sure the answer is obvious, but I'm just having a
> hard time seeing it. ;-)
>
> Take care.
> -john W4PAH
>
> On Tue, Aug 7, 2012 at 6:20 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>> John,
>>
>> I would suggest that you use the "one transistor keying circuit" (Google and
>> you will find many sources) for the keying and PTT. Connect the output of
>> the one transistor keyer to the K3 rear panel keying input and PTT input.
>>
>> You will still have the problem that the computer will activate those
>> signals when the computer boots, so boot the computer and than turn on the
>> K3 - or take other common sense precautions like switching the K3 to a dummy
>> load during computer boot times.
>>
>> 73,
>> Don W3FPR
>>
>>
>> On 8/7/2012 5:38 PM, John Shadle wrote:
>>> Hi all,
>>> I'm trying to accomplish keying with my K3 using the RS232 port and a
>>> COM port on my desktop computer.
>>>
>>> I currently use the RS232 for station logging to provide frequency,
>>> mode, etc. information and for rig control (e.g., click on a spot and
>>> then the radio changes frequency/mode). Unfortunately, the program I
>>> use (AC Log by N3FJP) does not allow you to choose the same COM port
>>> for both rig control and CW keying.
>>>
>>> My question is whether or not I could use a splitter of some type (at
>>> the K3) to go to 2 separate ports (e.g., COM 1 and COM 2), then use
>>> COM 1 for rig control and COM 2 for keying. Has anyone else done this?
>>> Is this acceptable practice?
>>>
>>> Thanks!
>>> -john W4PAH
>>> Madison, WI
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