[Elecraft] 9 and 15 Pin Y Connectors

[Don Wilhelm]

Bob,

I don't have a source, but I need to give you some information regarding 
the 9 pin connector.

The 9 pin 'Y' may give you problems.  RS-232 signalling is for point to 
point communications only.  If there are two drivers on a signal line, 
they will interfere with each other (even if idle).
In other words, if there is anything connected to pins 3, 4 or 7 in the 
device on the far side of the "Y" connector, it will interfere with 
communications between the K3 and the computer (Microham Digikeyer).

In other words, you cannot connect another device that normally drives 
an RS-232 interface.
Anything that is connected to the "Y" must be 'listen only'

73,
Don W3FPR

On 10/15/2012 8:02 PM, Bob Garrett wrote:
> Greetings Listers,
>
>
>
> I'm getting ready to configure my K3 with my THP amplifier, Microham
> DigiKeyer II and my K3 Pod with is a speech box for us blind hams.  I know
> connecting more than one device to a 9 and/or 15 pin port is a slippery
> slope however, I need to do it and will figure out the conflicts along the
> way.
>