USB for K2

[Tom McCulloch]

Hi gang,

I think this may have been previously covered, so I apologize if I'm
redundant.

I know the cable from the K2 to the nine pin plug is not wired in a
"standard" way,  but how do I go about interfacing my K2 to the USB port
on my computer?

I see this on Amazon, but I'm hesitant to try it:

http://www.amazon.com/dp/B00425S1H8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2BU7MNUYG3YU2&coliid=I1591SJBBKODFX

Thanks for your help with this,

Tom, WB2QDG
K2 #1103
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[vk2rq]

Do not plug in *any* RS232 adapter, including those supplied by Elecraft, without using an adapter cable as described on page 13 of the KIO2 manual:http://www.elecraft.com/manual/KIO2%20man%20rev%20C%20.pdf
Failure to put that adapter between the K2 and the RS232 connection may result in serious damage to the K2.
73, Matt VK2RQ

Envoyé à partir d'Outlook




On Thu, Nov 5, 2015 at 3:50 PM -0800, "Tom McCulloch" <[hidden email]> wrote:










Hi gang,

I think this may have been previously covered, so I apologize if I'm
redundant.

I know the cable from the K2 to the nine pin plug is not wired in a
"standard" way,  but how do I go about interfacing my K2 to the USB port
on my computer?

I see this on Amazon, but I'm hesitant to try it:

http://www.amazon.com/dp/B00425S1H8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2BU7MNUYG3YU2&coliid=I1591SJBBKODFX

Thanks for your help with this,

Tom, WB2QDG
K2 #1103
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[k6dgw]

There are only 3 of the 9 pins on the K2 DE9 that are RS-232 levels [+/-
12 V more or less, greater than the logic levels in the K2 at any rate]:
TXD, RXD, and Sig Gnd.  All the rest are internal levels [+5/0 I think]
and are internal control signals for accessories.

The one you mentioned looks like a standard USB-Serial adapter.  It also
has the Prolific chipset.  I haven't had any problems with Prolific but
many folks have.  The FTDI chipset is recommended by Elecraft.

I sold my KPA100 and KAT100 when I went QRP on my K2, but while I had
them, I just made a Y-cable from the K2 that split out the 3 RS-232 to
one connector and the remainder to another.  It wasn't hard.

I think that's pretty much what you have to do.  Elecraft may sell the
Y-cable adapter.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the Cal QSO Party 1-2 Oct 2016
- www.cqp.org


On 11/5/2015 3:50 PM, Tom McCulloch wrote:

> I know the cable from the K2 to the nine pin plug is not wired in a
> "standard" way,  but how do I go about interfacing my K2 to the USB port
> on my computer?
>
> I see this on Amazon, but I'm hesitant to try it:

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[Don Wilhelm-4]

Tom,

It has been covered many, many times.  All those who have purchased a
used K2 and do not have the special K2 to PC special cable, please pay
attenion - the health of your K2 may be at stake.

Do *not* plug a computer serial cable into that connector.  Note that it
is labeled "AUX I/O" and that does *not* mean "RS-232"
In addition to 3 RS-232 signal lines (TXD, RXD and Signal Ground), it
contains internal K2 signals that are used to control the KAT100, XV
series tranverters and the KRC2.  RS-232 level signals from a computer
port can damage those internal K2 signals, or at least cause "strange
operation".

Download the K2 KIO2 and/or KPA100 manual and build the cable that is
shown in those manuals.
You will need a length of shielded 4 conductor with ground wire, a male
and a female DE-9 connector and 2 backshells to hold the connectors.
You can plug that special cable into a computer serial port or connect
the PC end of that cable to a USB to serial adapter (use an adapter with
an FTDI chipset for best results).

73,
Don W3FPR

On 11/5/2015 6:50 PM, Tom McCulloch wrote:

> Hi gang,
>
> I think this may have been previously covered, so I apologize if I'm
> redundant.
>
> I know the cable from the K2 to the nine pin plug is not wired in a
> "standard" way,  but how do I go about interfacing my K2 to the USB
> port on my computer?
>
> I see this on Amazon, but I'm hesitant to try it:
>
> http://www.amazon.com/dp/B00425S1H8/ref=wl_it_dp_o_pC_nS_ttl?_encoding=UTF8&colid=2BU7MNUYG3YU2&coliid=I1591SJBBKODFX 
>
>
> Thanks for your help with this,
>
> Tom, WB2QDG
> K2 #1103
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]
>

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