On the Elecraft web site, in the K3 order form section, they list a KUSB (Univ. Ser Bus Adapt.) for $39.00. I assume this is a adapter to convert the existing K3 RS-232 Port to a USB Port? If so, it sounds like Elecraft is endorsing at least one RS-232 to USB Adapter. Can anyone confirm this? Thanks, Frank - W6NEK