Is it possible to program GPIO pin to be a "standard" PTT INPUT ( GND to
XMIT mode) ?
I'm asking because to control my VUSHF X-verters I have standalone RX/TX
this unit take care about ANT-REL, LNA, PA, XVERT and RIG RX7TX timing.
you could just connect the last sequencer port (RIG RX/TX) to the PTT input
on the microphone connector, too, saving the GPIO for other functions.
Even simplier will probably be to use the GPIO's TX-INHIBIT function (can be
selected by the menu then). That will ensure although PTT/CW is pressed the
KX3 will not put out any power until unlocked from the sequencer. Advantage
is you can connect all directly to the KX3, i.e. mic and CW key, use the
PTT-OUT from the KX3 to trigger the sequencer and that's it. Works ufb on my
K3 (same logic; contact me directly if you need more info, don't have
schematics, PCB layout, etc. on my website yet). So no need to route the mic
and key through the sequencer first making wiring a lot easier and being
able to also use the K3's and KX3's internal voice & cw keyer. :-))
----- Original Message -----
From: "Mart Tagasaar" <[hidden email]>
To: <[hidden email]>
Sent: Friday, March 16, 2012 3:38 PM
Subject: [Elecraft] KX3 ACC2 description
> Hi Don,
> Is it possible to program GPIO pin to be a "standard" PTT INPUT ( GND to
> XMIT mode) ?
> I'm asking because to control my VUSHF X-verters I have standalone RX/TX
> sequencer and
> this unit take care about ANT-REL, LNA, PA, XVERT and RIG RX7TX timing.
> 73! de ES2NJ
> Elecraft mailing list
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