[Elecraft] KX3 CW from computer

[KU7Y]

If I'm reading the manual right, there is no need for PTT when using CW.

Set the transmitter keying method to VOX and it will key without needing to 
use the PTT line.  If you set the break-in delay (DLY) to 0, (zero), you 
will have full QSK.

I have no idea how the 100w amp will work.  IMHO it should be able to do 
full QSK but time will tell......

OK, back in my hole,

Ron, KU7Y
SOWP 5545M
Arizona Outlaws Contest Club
Brenda, AZ (Winter)
Caldwell, ID (Summer)
ku7y at qsl.net
http://www.hatpinsandmore.com
----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at embarqmail.com>
To: <elecraft at mailman.qth.net>
Sent: 12 March, 2012 10:54 AM
Subject: Re: [Elecraft] KX3 CW from computer


>I do not believe there is a need for 2 com ports.
> Most logging applications only handle 1 port.  They use TXD and RXD for
> rig control and do keying and PTT with RTS and/or DTR in the same port.
> All you need in addition to the KX3SER cable is to make two of the "one
> transistor keying circuit" to convert the RS-232 levels to TTL - connect
> one circuit to the RTS pin, the other to DTR (in the same KX3SER
> cable).  on the KX3 side of the 2 circuits, one connects to the hand key
> input and the other connects to  PTT.
>
> Actually, you will probably want to make your own KX3SER cable because
> the production cables will have a molded backshell according to a post
> by Eric last week - but making your own should not be difficult at all,
> a male DE-9 connector, a backshell, a 3.5mm stereo plug and some wire -
> add 2 transistors for the one transistor keying circuits and you are done.
>
> 73,
> Don W3FPR
>
> On 3/12/2012 12:51 PM, Tony Estep wrote:
>> On Mon, Mar 12, 2012 at 11:18 AM, KU7Y<ku7y.cw at gmail.com>  wrote:
>>> ...I changed over to using a USB WinKeyer...
>> ========
>>   I can set up my software to use 2 Com ports, one for
>> rig control and one for keying, and have a second gadget attached to
>> the computer to key the radio.
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