[Elecraft] K-Line system integration questions

[Don Wilhelm]

Actually, most of the RS-232 manual switches that I have disassembled 
have 25 or more poles on the rotary switch, and they have plenty of 
positions too, but only two positions are available until you break off 
additional tabs on the switch.

73,
Don W3FPR

On 11/26/2012 9:42 AM, Ed Muns wrote:
> Dick K6KR has covered the issues well.  To expand Dick's advice on the
> RS-232 switch, here is some more detail.
>
> microHAM products that provide K3 Serial CAT control via their USB
> connection to your PC cannot be used with the K3 Utility for firmware
> upgrades.  You will need to use a direct Serial connection to your PC with
> the K3 Utility.  That means disconnecting the microHAM Serial connection
> from the K3 and then connecting a Serial cable to your PC.  (The latter can
> be a Serial COM port on your PC or via a USB-Serial adapter such as Dick
> describes below).  Therefore a simple manual switch is handy so you can
> switch between CAT control with the microHAM box and K3 Utility usage via
> the direct Serial connection.  Connect the common DB9 port of the switch to
> the K3 Serial connector and then each of the switched DB9s to the microHAM
> K3 Serial DB9 and the direct Serial DB9 cable respectively.  This assumes
> that the "2x1 RS232 manual switch" is what we think it is ... a SPDT DB9
> switch.
>
> Ed W0YK
>
>   
>