[Elecraft] K2 - computer interface

[Poul Erik Karlshøj (PKA)]

Don,
I have done the test suggested in the KIO2 manual (hearing the sidetone - does that really check the SIO module?). The test went OK. And also I know that the K2 connected last time I tried on a computer with RS-232 port.
I have tried to apply the 12V to the ATU either before or after applying 12V to the K2 (I seem to remember that there was an issue).

I checked that the K3 will connect at either speed 4800 or 38400 bps with this USB converter, so don't suspect it's a speed issue.

I have a KXUSB (which I assume is using the FTDI chipset), but I need info about how to connect the mini-jack (tip-ring-sleve) to a DB9 connector. Maybe you can help me?
At least it's worth a try I think.

73, Paul
OZ4UN

-----Oprindelig meddelelse-----
Fra: Don Wilhelm [mailto:w3fpr at embarqmail.com] 
Sendt: 29. april 2015 16:54
Til: Poul Erik Karlshøj (PKA); elecraft at mailman.qth.net
Emne: Re: [Elecraft] K2 - computer interface

Paul,

Try another adapter, preferably one with the FTDI chipset.
Many adapters do not like to run at the slower baud rate of the K2 (4800).  I suspect that may be problem with your K2.
Try an application other than HRD.  HRD polls rapidly, so that may be part of the problem - although if you cannot even connect, I would believe the adapter is the problem unless something has happened to the
K2 data port since the last time it was used.

Try the tests given in the KIO2 manual to determine if the K2 interface is working.  Even if you have the KPA100, try those tests - the TTL to
RS-232 conversion in the KPA100 is the same as in the KIO2.

73,
Don W3FPR

On 4/29/2015 10:09 AM, Poul Erik Karlshøj (PKA) wrote:
> I used to connect (using HRD) my K2 to a laptop having serial ports using the specially configured cable (K2 > ATU > computer). Worked just fine.
> Quite a few years ago I got the K3 and connected the K3 (using HRD)  to a computer with no RS-232 ports using a Targus PA088E USB/RS-232 converter cable. Works fine and I kind of forgot about the K2.
>
> Now, recently I decided to try to connect (using HRD) the K2 using this Targus USB converter and cannot get HRD to connect.
> Should I be able to connect K2 to the computer (WIN7)? As stated it works just fine with the K3.
>
> I think there should be a lot of (happy) K2 owners who can help me!
>
>