Thanks for the info. I will have to make up that short cable! Fortunately my K2 is the B level.
73, Dave On Sat, Feb 27, 2021 at 5:10 PM Geert Jan de Groot <[email protected]> wrote: > > > Is the KUSB cable compatible with the K2? Should have asked this before > I > > bought the cable. My K2 has worked with a serial port adapter from > Keyspan > > for several years and with a variety of logging programs. > > So I went with the KUSB. When I connect it, the K2 does strange things. > > Power control turned all the way down results in a nice 10 watt output > and > > normal operation. When Power control is turned up I get a HiCurr and > LoPWR > > error and the display only shows power, not frequency. > > Please read the KIO2 documentation: any serial device may only be > connected *if only pin 2, 3, 5* are connected. If you connect a serial > device with the other pins connected, which the KUSB as well as most > other devices have, *you can cause serious damage to your K2*. > > It is essential that the other pins are left unconnected, they are used > for other signals and the RS232 signals give voltages that cause damage. > > So, if you use the KUSB, make sure to insert a short cable that ONLY > connects these 3 wires, NOTHING ELSE. > > How much damage is done partially depends on the hardware mod version of > your K2. The "B" mods includes some modifications that should limit some > of the most serious damage, like blowing up the main processor of your > K2. There is a document somewhere that describes what damage a K2 > suffers because of this; it's a long list > > Despite the fact that the KIO2 sports a DE9 connector, it really isn't a > standard serial port. In hindsight, Elecraft should have chosen a DE15 > connector instead (making sure that a "VGA cable" would not cause > damage. Ah well, too late now.. > > 73, Geert Jan > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
