[Elecraft] K2 USB vs. DB9

[Larry Phipps]

I have played with those chips (FTDI), and the integrated connectors 
with built-in chips, for possible use in my kits to replace the RS232 
ports. The chips are reasonably priced, although still a tad more 
expensive than the MAX232 series, and only available in SMT, which adds 
assembly cost for me. The integrated connector assemblies are not cost 
effective IMO.

I have tested a converter cable sold by ByteRunner...

http://www.byterunner.com/byterunner/product_name=Y-105 

It uses a Prolific chipset, and it seems to work just fine. The price is 
$8.69 in unity quantities plus 1st class shipping. That's about $10, and 
it lets the user decide whether to use RS232 or USB. They claim to have 
Vista drivers, but I have no need for them at this time.

I have used it with my K2, TS-480S, IdiomPress rotorcard, and of course 
all my own LP products, and it seems to be solid. Even the handshaking 
pins are implemented properly. I plan to recommend this cable to my 
customers in the future... it appears to be a real bargain.

73,
Larry N8LP
www.telepostinc.com



John Hoaglun wrote:
> Hello to the folks on the list.
>
> I am getting ready to order my K2 kit sometime over the next few days.
> (I sold my 746pro to be replaced with the K2 in QRP mode.) I was
> wondering if anyone on the list has designed a USB connection to the
> replace the DB9 serial interface?
>
> I see no point in having to use a USB to Serial dongle in today's age.
> Most new PCs only have USB especially laptops. It seems like it would
> pretty simple to replace replace the DB9 with USB driver chip. (I
> thought that there was an article in Nuts & Volts recently that maybe
> tackled the Serial to USB conversion.)
>
> Thanks for the bandwidth.
>
> 73
>