[Elecraft] Use of DB9 Switch with K3?

[Luis V. Romero]

Hi George:

Just heard you on 10 meters a couple of minutes ago calling CQ on CW.

Although I don't use a P3 (My new roof just finished being installed a
couple of hours ago, so the P3 will wait for later in 2011), my setup is the
following:

"Real" com port 1 from my computer goes to side B of the switch.  The
MicroHam MK2 serial output goes to port A.  There is a standard RS232 cable
going from the common output of the switch feeding the serial input of the
K3.  

When I need to load software or do any adjustments with K3-EZ or the
Utilities, I switch to the "real" comp port.  When I operate, I switch to
the MicroHam.  You can do this while the MicroHam is online, and it does not
bother it.  The frequency display on its front panel shows dashes until I
switch back to the MicroHam output on the switch.

Its transparent and I have never run into any issues with this setup at all.

-lu-W4LT-

------------------------------- 

Message: 23
Date: Fri, 17 Dec 2010 22:45:10 EST
From: Georgek5kg at aol.com
Subject: [Elecraft] Use of DB9 Switch with K3?
To: support at microham.com, elecraft at mailman.qth.net
Message-ID: <2b4b3.72d9996.3a3d8846 at aol.com>
Content-Type: text/plain; charset="US-ASCII"

At times, my microHam CW Keyer is connected to my K3 via the P3.   However, 
when I want to download new firmware for the K3, I have to disconnect  the 
CW Keyer from the RS232 port, and connect the DB9 from the computer's serial

 port to the K3 via the P3.
 
Can I use a DB9 A/B switch to switch between the the two DB9 cables without 
 creating any problems?
 
73, George
 
George  Wagner, K5KG
Sarasota, FL 
941-400-1960  cell



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