[Elecraft] K3, LP-Bridge, SteppIR BiggIR antenna

[Larry Phipps]

  Hi John. First, make sure that you are using the top port on the 
SteppIR controller. Second, you can't use a standard cable. The SteppIR 
requires a special cable which you can make yourself. It needs to be 
3-wire null modem (crossover), with pins 7&9 tied together on the 
SteppIR side. Here is a rough sketch of how it works...

SteppIR end ...................  PC end
---------------------------------------------
1 --------------------------------- 2
2 --------------------------------- 1
5 --------------------------------- 5
7
I
9

You can also try a Y cable on the K3 side of the USB adapter, but you'll 
have to set the baud rate in the SteppIR controller to 38,400 if that's 
possible. There are subtle advantages to using the LP-Bridge output, as 
long as you always have LP-Bridge running.

73,
Larry N8LP


On 1/11/2011 12:00 PM, elecraft-request at mailman.qth.net wrote:
> Date: Mon, 10 Jan 2011 23:25:59 -0500
> From: "John Gaynard"<jgaynard at columbus.rr.com>
> Subject: [Elecraft] K3, LP-Bridge, SteppIR BiggIR antenna
> To:<elecraft at mailman.qth.net>
> Message-ID:<04ae01cbb147$a6087e80$f2197b80$@columbus.rr.com>
> Content-Type: text/plain;	charset="us-ascii"
>
> I have the LP-Bridge functioning with the logger.  I now need to get it
> working with the SteppIR.  The K3 connects to the computer via the COM1
> port.  I have the current  K3 USB serial cable connected to the SteppIR via
> COM9 port  using a serial extension cable with DB9 F to DB9F adapter to
> match up with the DB9M connector on the K3 USB cable.  The SteppIR is set to
> Kenwood command set and 4800bps.  The SteppIR is not responding to frequency
> changes on the K3.  I see the USB serial output on the LP-Bridge port
> display.
>
>
>
> John K8WDN