[Elecraft] USB to Serial adapter for KIO2

[Fred Jensen]

Paul:  There seem to be two distinct USB-serial chipsets, FTDI and 
Prolific.  Others [like Keyspan] appear to use the Prolific [most of the 
time].  Three older Prolific models are not supported in Windows 10 and 
will give "Error 10" when plugged in.  Prolific has also had problems 
with counterfeit chipsets from "you know where."  Many of these do not 
implement the entire standard and people have had problems with them and 
drivers, beyond the Win 10 issue.

You can purchase a guaranteed FTDI adapter cable from Elecraft, I just 
did and it works fine.  You can also find them on Amazon, however I 
decided against those since their provenance is not really clear.

BEWARE:  The DE-9 on the back of the K2 is *NOT* a regular RS-232 serial 
port.  Three of the pins [RXD, TXD, GND] conform to RS-232 standards, 
the remainder are internal K2 signals for the 100W ATU.  Elecraft sells 
an adapter cable that passes just the three signals, or you can easily 
make your own.  Plugging the USB-Serial adapter directly into the K2 
will likely damage the radio.

73,

Fred ("Skip") K6DGW
Sparks NV USA
Washoe County DM09dn



On 3/30/2017 6:43 AM, Paul Huff wrote:
> I am adding a KIO2 to my Elecraft K2 and will of course build the required interface cable per the Elecraft instructions.  But my computer will require adapting the serial connection to a USB.  I have heard that some adapters work well and others do not.  I would be interested in hearing specific brand suggestions for a good adapter.
>
> Thanks and 73,
>
> Paul - N8XMS
> NAQCC President
> NAQCC #0675
> http://www.naqcc.info/ <http://www.naqcc.info/>
>
>
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