[Elecraft] RJ-11 connector on bottom of the Front Panel

[Bruce McLaughlin]

I have frequently read that the jack in question is strictly for factory
production testing and has no use beyond that purpose.  I know that in the
past folks have speculated that perhaps it could be used for an external
keyboard or some other accessory.  Unfortunately, the Elecraft response has
always been no it can't.  Beyond that, it is a mystery.

Bruce-W8FU

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Brian Moran
Sent: Thursday, December 10, 2009 5:50 PM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] RJ-11 connector on bottom of the Front Panel

What signals are available on the RJ-11 connector on the bottom of the front
panel?  I see some lines on the schematic that indicate the data bus is
available.

Can the signals on the RJ-11 be controlled via macros, or can I cause a
front-panel button to put something on those control lines without otherwise
performing an in-radio operation?

I have an external switching matrix for listening antennas that I'd like to
control via the front-panel; I theorize that I could build something that
snoops the data bus via the RJ11 and then use M1-M4 to control which RX
antenna I'm listening to....

Brian N9ADG


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