[Elecraft] KIO3B usb com port not communicating

[Jack Brindle]

Do you have BOTH plugs connected to the P3? You need to use the cable that has not one, but two DE-9 connectors - this allows the data to flow from the USB interface through the P3 and then back to the K3S. Without it, I would expect exactly the behavior you describe. In fact, I experienced exactly the behavior, which is why I know.

Be sure to use the double DE9 cable, not the one with just a single DE9. 

73!
Jack, W6FB

> On Jul 19, 2019, at 11:32 AM, Rajiv Dewan <rdewan1 at rochester.rr.com> wrote:
> 
> Hello all, especially Don,
> 
> The last tip helped make progress.  I unplugged the P3 connected via the RJ45 jack and suddenly my USB/CAT came back to life.
> 
>  And, this disruption is repeatable.  Plug the P3 back and again it stops working.  Unplug, works again.
> 
>  Now, I will look to see what is up with the P3.  I checked the firmware on the P3.  It is running the latest.
> 
>  Raj
> 
> --
> Raj Dewan, N2RD
> rdewan1 at rochester.rr.com
> 
> ------ Original Message ------
> From: "Don Wilhelm" <donwilh at embarqmail.com>
> To: "Rajiv Dewan" <rdewan1 at rochester.rr.com>
> Sent: 7/19/2019 1:32:38 PM
> Subject: Re: [Elecraft] KIO3B usb com port not communicating
> 
>> Raj,
>> 
>> Email support at elecraft.com
>> 
>> 73,
>> Don W3FPR
>> 
>> On 7/18/2019 10:03 AM, Rajiv Dewan wrote:
>>> Hello,
>>> 
>>>   I have KIO3B (USB interface) in my K3.  It was working well. Single USB for audio, and CAT.
>>> 
>>> Suddenly, now the CAT part is not working.  Here are some aspects:
>>> * RS232 in K3/Config shows USB
>>> * Serial port 1 shows up in device manager on the windows computer when the USB is plugged in.  The sound codecs are working.
>>> * Nothing communicates with the K3 CAT any more (K3 utility, and logging programs do not see the K3 on the com1.)
>>> * I tried it on a new laptop with a fresh USB cable.  Exactly the same issue.
>>> 
>>> Any help appreciated.
>>> 
>>> Raj, N2RD
>>> K3 sn 170
>>> 
>>> -- Raj Dewan, N2RD
>>> rdewan1 at rochester.rr.com
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